This was one of the most wicked cool things I've read in a long time.
I grew up in a TV market that was UHF only (South Bend, IN) in the 1970s. TVs from before about 1963(?) didn't have to have UHF dials. So a company named Blonder-Tongue (Blonder was pronounced like blunder) produced UHF receivers you could attach to your TV through the little screw tab things on the back, the predecessor to the coax input. I had never seen Blonder-Tongue referenced anywhere except in nostalgia articles about my hometown.
Ah yes, South Bend is too close to Chicago, too close to Indianapolis, too close to Detroit... No VHF frequency left to allocate! The biggest problem is Chicago. South Bend is on a subcontinental ridge, with an average elevation nearly 300 feet higher than Chicago, and with all the transmitters in Chicago up 1500-1800 feet above ground and close to the lake, overcoming the curvature of the earth limitations on VHF propagation is fairly simple. Anyone in South Bend with a large antenna on their roof would easily receive all the stations.
On the upside, that meant having two versions of CBS and NBC (I don't remember an ABC affiliate in South Bend) plus the couple of other stations. My cousin got his start as a weatherman on NBC in South Bend simply by them needing someone to fill in from time to time and him being essentially the only person they could find that grew up in South Bend but had gone off to study meteorology at a university that was very very good for meteorology.
Blonder tongue was a well known vendor for regional cable tv network (analog) operator equipment, supplies, electronics. I think it still exists in some form for video mixing/live studio broadcast equipment.
I work in a lot of nursing homes and their in-house "cable" systems are almost universally a rack full of DirecTV receivers connected to a rack full of Blonder Tongue NTSC modulators. I would have to assume similar systems were common in all sorts hospitality environments in the past, and only survive in nursing homes because most of the residents don't care about HD and might not even want it.
The is probably how all jails and prisons are running their systems, too. Lots of these places still running CRT 4:3 TVs too. The 4:3/16:9 issues are rampant. And obviously the picture quality is just like you remember from the 1980s.
My time to shine! I still own an early square body truck with the 6.2L Detroit Diesel. The thing that stands out to me in this article is that the Suburbans shown are an earlier generation produced from 67-72. Those did not have a Diesel engine, however the 6.2L Detroit Diesel was designed to drop into anything with a Small Block Chevy, so I can see how these may have been retrofitted. In fact, these engines are still produced today in 6.5L form (see the AM General Optimizer) and are used in the HMMWV.
These really are very simplistic engines and simplistic vehicles in general. Mine has power nothing, at least electronically. The shifter really is comically large and very inconvenient to whoever sits in the middle. The highest gear is third gear.
Powerful? No, not really. But surprisingly efficient for the size. Reliable as well.
You must get a lot of questions (or confused looks) when people see that thing still running! The simplicity of those engines is kind of a lost art these days. Everything now is so computerized that you can't even diagnose half the issues without special software.
The original castings were pretty poor in the 6.2 and 6.5 and lots of them crack at the crank webbings. This is supposedly fixed in the AM General blocks. They were common work trucks in the PNW (forestry, mining) but while you see the old Cummins or Ford IDI's around still the "Detroit"'s (no relation to the 2 stroke Detroit or Series 60) are quite rare. My family still has an early mechanically injected 6.5 that's held up OK though (~300,000km on it).
the 6.2 and 6.5 are good engines - but dodge has the cummins and the ford powerstroke (other than the 6.0) are a much better engine and so they get a bad reputation.
The Power and Signal Distribution (PaSD) SMART boxes (Small Modular Aggregation RFoF Trunk) are an essential component of the Square Kilometre Array Low frequency (SKA-Low) telescope, currently under construction at Inyarrimanha Ilgari Bundara, the CSIRO Murchison Radio-astronomy Observatory, in Western Australia.
The SMART boxes provide electrical power to the SKA-Low telescope's 131,072 antennas and collect signals received from the sky to go off-site for processing.
[ .. ] “The ‘radio quiet’ results that the ICRAR-designed SMART boxes achieved were to the highest standards in radio astronomy. A mobile phone on the surface of the moon would cause more interference to the antennas than the SMART boxes that sit among them,”
RF over fiber is a fairly well established thing, it's used in two way data satellite earth stations to convert a L or S band signal into something that can go a longer distance from the antenna to a conditioned equipment room at the same place.
I would imagine it's because electrical amplifiers, filters, and other such items are cheap and well understood. Whereas optical amplifiers, filters, and other such things, particularly ones that operate at low-GHz frequencies are expensive and kinda wild
well, an optical amplifier wouldn't do anything at all attached to a waveguide into a feed horn, in something like a 6.3 meter ku or c band cassegrain antenna design antenna aimed at a geostationary satellite... that's the job for a BUC/SSPA. You need. it needs to be RF.
rf over fiber in a satellite teleport application is more about being able to separate the modem from the antenna-mounted LNB and BUC/SSPA which might be some distance away.
your typical satellite modem will have an RF interface either somewhere between 70 to 140 MHz (where it's intended to be upconverted/downconverted by the LNB and BUC/SSPA at the antenna), or somewhere between 1100 to 1900 MHz, both intended for attachment to low loss coaxial cables. This works fine if you're putting the modem fairly close to the LNB and BUC/SSPA. If it needs to be a hundred meters away or something, it's a lot of RF loss, and path loss/link budgets in geostationary satellite are already hard enough without introducing any more loss at the ground side.
I spent two weeks there, during the commissioning of the Green Bank Telescope (GBT). Our team was designing the monitor and control system for an upgrade for another NRAO telescope, the Very Large Array in New Mexico. The team from the GBT led us through their design during the day; our nights sleeping in the on-site dormitory, complete with the break room where Frank Drake came up with his Drake Equation estimating the number of extraterrestrial civilizations...
Those old diesel trucks!
The GBT is so big, it's just wrong. Experiencing the forest moon of Endor, in real life.
(The single-dish GBT is sensitive to near-field RFI, whereas the multi-dish Very Large Array is a bit more tolerant. The VLA isn't restricted to antiquated diesel vehicles. Although they do ask visitors to power off cell phones and refrain from any microwave ovens that RVs might bring in.)
I'd happily settle for embedded computer free anything. Or even just not-cell-network-connected and no touchscreens. The bar has dropped quite low at this point.
Not ever. But apparently there's some new model called the Champ that starts around 10k, and has people who want simple trucks raging out. For good reason, it's a solid looking simple truck.
> Before retiring from NRAO (years after my interviews with him), Mr. Sizemore outfitted a new Dodge Ram extended cab truck as an RFI vehicle, a feat which was written up in USA Today.
This is an awesome article. I'm a HAM in an urban area trying to figure out how to operate in the mess that is my EM spectrum with low power gear. It's a fun challenge, but having some quiet would be nice!
I haven't had the pleasure of seeing this site, but I did have the opportunity to visit Sugar Grove Station (not too far away) while it was in operation. I had a friend stationed there while I was nearby, and took a detour to spend the weekend at his house on the base.
Seeing the massive old radio telescopes and the tracks they used for positioning them was something else. The scale is hard to communicate; it's kind of like the first time you get up close with a Navy Aircraft Carrier. It's hard to fathom just how BIG they are until you are next to them.
Were you allowed on base? What was your experience like and your perception of what was going on?
I had the opportunity to perform a bat survey at Sugar Grove, and a poor guard had to come out to keep an eye on us until 3am because we couldn't be left alone. We noted curious wooden gazebos positioned around a featureless meadow, hinting at significant manned infrastructure underground.
Unlike the Green Bank Observatory from the above article, Sugar Grove was piggybacked on the National Radio Quiet Zone so the NSA could intercept intercontinental telecom traffic as a part of the ECHELON network. The cover story was that it was a run-of-the-mill AT&T site, but was an open secret for all the Pendleton County WV locals that it was a spy site. The base was also home to the best restaurant in the whole county, which isn't saying much for a single-traffic-light county.
Yes; I was cleared to the level required (but not need to know) and the visit was approved by his (the base) CO. He was stationed there as a Crypto Tech, and though I couldn't see the really neat underground stuff I was mostly free above ground as long as I was chaperoned by him. He gave me quite the tour.
The gazebos are there due to the underground facilities, yes. There is likely a whole lot more than even you realized.
As for my impressions: I was a Security Manager for a more operational side of the Navy for years (later). I informed a lot of my edge case thinking with what I saw of how they handled things there. I don't know that I really want to go into more detail than that.
One of my favorite parts about the old perkins diesel engine in our boat is that you need to press a button to stop it from running once started. You turn off the ignition and it just runs on physics until you do something to interrupt the fuel or air supply.
The scariest story I've heard was a parked diesel pickup truck going runaway acceleration because of the hydrocarbon vapours in the air due to an industrial accident.
They abandoned the pickup and it subsequently got blamed "A diesel pickup truck that was idling nearby ignited the vapor, initiating a series of explosions and fires that swept through the unit and the surrounding area".
I read about it in one of the disaster reports about the Texas City BP refinery explosion. Ugly mistakes were made.
I grew up in this area of West Virginia, it's such a crazy thing that a community of really amazing scientists are nestled in the middle of this incredibly rural area. It's really neat to see the old blue trucks if you take the tour, and the Cass Scenic Railroad is just nearby and gives a really beautiful view of the telescope array. The National Youth Science Academy Camp is also surprisingly located nearby, it was wild as a kid knowing that this batch of future scientists were flying in from all over the country and once I learned of it I wished I'd studied a bit harder. Such a beautiful, strange place.
I imagine that there will come a time when they’ll need to revert to horse and wagon transport at the site. Or perhaps lay down railroad tracks and use cable cars.
Up until the 2000s diesel engines in cars used mechanically controlled injection. With those, once started, the engine will run without any electronics.
Engines produced for industrial applications (such as tractors) in developing countries still use this, as it's a lot simpler and more reliable. Military trucks are the same. Just don't tell the EPA.
I have a 10kW diesel motor that doesn't have any wires at all, no battery. It's my SHTF generator for my well.
I might have to wind a generator motor if the reason stuff went bad is because of emp, but otherwise, yeah, you can buy 100% mechanical diesel engines still.
In 2006 my friend and I decided to stop talking about visiting the NRAO and actually go. We picked a weekend and then discovered that that Sunday was the 50th Anniversary open house! There were special exhibits and more of the facilities were open to tours than on regular visitors days. I can highly recommend visiting if you get the chance.
Coincidentally, my friend's last name is Blonder! And he's related to the Blonder-Tongue founder. According to my friend, all Blonders are related, the family name was originally Gottlieb, but was changed to something more Anglo sounding, to avoid anti-semitic discrimination, probably when they immigrated to the US from Russia.
> Here he monitors the gross violations of the Quiet Zone and also looks at the local environment: powerline noise, illegal use of radios, etc.
For example, at the time of my visit there, the amateur radio bands were being used improperly by a group of people and the signal was strong enough to overload the 140-foot telescope, so it became a serious problem... The likely action taken will be that he calls the FCC in to enforce the rules in place. After 20 years on the job, Wesley has built up a network of contacts he can call upon when he needs help. One of those contacts is the man in charge of the Enforcement Bureau at the FCC, whom Wesley knew when he was still a satellite technician.
Always interesting to hear examples how effective coordination often comes down to networks of people-connections that get built up over time. Software folk often think it's simply automating whatever process -- I certainly thought that early on -- but more and more I'm seeing it's about knowing the person in the right role with the right experience. Your personal network is leverage.
The last two sections about helping out a grumpy farmer with an old burned out amplifier and coordinating secret fly-overs with the Cheyenne Mountain guys are also great people-network stories.
It's a shame we don't better contain all the EM noise emanating from our modern vehicles.
I'm dealing with this issue right now on my boat (EM noise from hydraulic trim pump for the drive leg is coupling to a power supply line running to a more sensitive electronic component).
Since the unwanted interference is from sparkplug, I wonder - assuming it would contain no additional electrincs, could they get some EV? Or does the electric engine itself generate noise by necessity?
The seats weren't really all that comfortable to begin with. However, you can rebuild the seats. LMC Truck has rebuild kits with new foam and covers. You can even add heated seats.
1987 E30 owner - even after getting the mold out during a restore, and in spite of a crack in the bolstering, the E30 sport seats are the _second_ most comfortable I've had the pleasure of owning. The seats in these old cars definitely have something up on modern leather seats, even its 27-years-older brother (4-series) that I drive daily.
The champion in that department, though, was the 1986 Volvo 740 that I briefly owned. Those seats were perfect in nearly every way.
Diesels use glow plugs to heat the cylinders prior to starting, to explain why sibling mentioned needing to keep them warm. Luckily resistive heat doesn't make RF noise, at least not that I've noticed. But they could also garage them with potbelly oil burners, too.
Not sure what you mean by the brute force approach. The problem is that the terrestrial noise sources are many orders of magnitude stronger than the faint signals that the ultra-sensitive receivers are designed to receive, and easily saturate them. The only recourse is to excise any data taken during an RFI episode. It would be extremely difficult, if not impossible, to do science in many RF bands of interest were it not for the NRQZ.
I figured as much. The question about why it is needed brought to mind something I was told when I started work there, over three decades ago. It was something along the line that all the signal energy recorded by the observatory’s telescopes integrated over their lifetimes amounted to less energy than is expended by one flea making one jump. I don’t know exactly how accurate that is, but it does rather vividly illustrate the problem.
The 5.9L 12-valve Cummins is also a fine choice. Another fully mechanical engine. In theory, with a manual transmission, you can operate a vehicle without even a battery after it's started.
Well, almost. The 5.9L fails safe: there is a fuel shutoff solenoid which operates in reverse: you give it power to keep the fuel flowing. You’d need to modify it to force the solenoid open (or remove it).
The OM617 (as used in many 1980’s Mercedes sedans) fuel shutoff operated on vacuum, and once started, the engine would run with no electrical system at all.
What ECM? They're mechanically injected diesels. The main purpose of the electrical system is to run the starter to crank the engine. And maybe headlights and stuff.
Grew up around some farm trucks that were electronic free diesels. My grandfather called them "luddite diesels". Later in life I realized the humor, considering that a diesel engine is a technology, and that luddites likely prefer horses...
No, the technologies that the Luddites disliked were very specific and regional. They only cared about machines that threatened their own personal jobs, not anyone else’s job.
This was one of the most wicked cool things I've read in a long time.
I grew up in a TV market that was UHF only (South Bend, IN) in the 1970s. TVs from before about 1963(?) didn't have to have UHF dials. So a company named Blonder-Tongue (Blonder was pronounced like blunder) produced UHF receivers you could attach to your TV through the little screw tab things on the back, the predecessor to the coax input. I had never seen Blonder-Tongue referenced anywhere except in nostalgia articles about my hometown.
Ah yes, South Bend is too close to Chicago, too close to Indianapolis, too close to Detroit... No VHF frequency left to allocate! The biggest problem is Chicago. South Bend is on a subcontinental ridge, with an average elevation nearly 300 feet higher than Chicago, and with all the transmitters in Chicago up 1500-1800 feet above ground and close to the lake, overcoming the curvature of the earth limitations on VHF propagation is fairly simple. Anyone in South Bend with a large antenna on their roof would easily receive all the stations.
On the upside, that meant having two versions of CBS and NBC (I don't remember an ABC affiliate in South Bend) plus the couple of other stations. My cousin got his start as a weatherman on NBC in South Bend simply by them needing someone to fill in from time to time and him being essentially the only person they could find that grew up in South Bend but had gone off to study meteorology at a university that was very very good for meteorology.
It's funny how certain brands or bits of tech can feel almost legendary in one place but totally unknown everywhere else
Blonder tongue was a well known vendor for regional cable tv network (analog) operator equipment, supplies, electronics. I think it still exists in some form for video mixing/live studio broadcast equipment.
https://www.blondertongue.com/
I work in a lot of nursing homes and their in-house "cable" systems are almost universally a rack full of DirecTV receivers connected to a rack full of Blonder Tongue NTSC modulators. I would have to assume similar systems were common in all sorts hospitality environments in the past, and only survive in nursing homes because most of the residents don't care about HD and might not even want it.
Also white labelled so e DishNetwork receivers with a few mods: https://www.youtube.com/watch?v=jBf3dZUAImk
The is probably how all jails and prisons are running their systems, too. Lots of these places still running CRT 4:3 TVs too. The 4:3/16:9 issues are rampant. And obviously the picture quality is just like you remember from the 1980s.
Like industrial equipment - you know it’s going to be good when it has an absurd name (company or model). Assuming it’s been around awhile.
My time to shine! I still own an early square body truck with the 6.2L Detroit Diesel. The thing that stands out to me in this article is that the Suburbans shown are an earlier generation produced from 67-72. Those did not have a Diesel engine, however the 6.2L Detroit Diesel was designed to drop into anything with a Small Block Chevy, so I can see how these may have been retrofitted. In fact, these engines are still produced today in 6.5L form (see the AM General Optimizer) and are used in the HMMWV.
These really are very simplistic engines and simplistic vehicles in general. Mine has power nothing, at least electronically. The shifter really is comically large and very inconvenient to whoever sits in the middle. The highest gear is third gear.
Powerful? No, not really. But surprisingly efficient for the size. Reliable as well.
I once swapped an OM617 (the 5-cylinder turbodiesel used in many 80’s Mercedes sedans) into a 67 Chevy pickup.
Once started, the engine would run with no electrical system at all! Even the fuel shutoff operated on vacuum.
https://youtu.be/5teg3Zlj0bo
https://youtu.be/q8LEWIZi21Q
https://youtu.be/kuDcSuwdzaw
https://youtu.be/MqWwUC3h3VU
By far my favorite hack :)
You must get a lot of questions (or confused looks) when people see that thing still running! The simplicity of those engines is kind of a lost art these days. Everything now is so computerized that you can't even diagnose half the issues without special software.
The original castings were pretty poor in the 6.2 and 6.5 and lots of them crack at the crank webbings. This is supposedly fixed in the AM General blocks. They were common work trucks in the PNW (forestry, mining) but while you see the old Cummins or Ford IDI's around still the "Detroit"'s (no relation to the 2 stroke Detroit or Series 60) are quite rare. My family still has an early mechanically injected 6.5 that's held up OK though (~300,000km on it).
I'd say that 6.5 as plenty of life left. My 6.2 is pushing 400,000km.
the 6.2 and 6.5 are good engines - but dodge has the cummins and the ford powerstroke (other than the 6.0) are a much better engine and so they get a bad reputation.
Came to say 6bt aka the 12 valve must be a contender
The 6.2/6.5 were gm engines not detroit diesel. very different engenes.
Detroit Diesel was a division of GM at the time: https://en.wikipedia.org/wiki/Detroit_Diesel#Origins
Today, in the Murchison Radio Quiet Zone:
~ https://www.australiandefence.com.au/defence/cyber-space/icr...I still haven't found any vehicle guidelines for the Inner Zone ( 70 km radius ), but for anyone with an interest:
* General introduction: https://www.industry.gov.au/science-technology-and-innovatio...
* Restricted airspace: https://www.avsef.gov.au/consultations/restricted-airspace-o...
* Limits of intereference by frequency and distance table: https://www.ursi.org/proceedings/procGA11/ursi/JP2-17.pdf
RF over fiber is a fairly well established thing, it's used in two way data satellite earth stations to convert a L or S band signal into something that can go a longer distance from the antenna to a conditioned equipment room at the same place.
https://www.vialite.com/market-sectors/satcom/
https://dev-systemtechnik.com/rf-over-fiber/
Very cool. Is there a reason the RF has to be converted back to RF after the fiber link vs processing the RF spectrum data optically?
I would imagine it's because electrical amplifiers, filters, and other such items are cheap and well understood. Whereas optical amplifiers, filters, and other such things, particularly ones that operate at low-GHz frequencies are expensive and kinda wild
well, an optical amplifier wouldn't do anything at all attached to a waveguide into a feed horn, in something like a 6.3 meter ku or c band cassegrain antenna design antenna aimed at a geostationary satellite... that's the job for a BUC/SSPA. You need. it needs to be RF.
rf over fiber in a satellite teleport application is more about being able to separate the modem from the antenna-mounted LNB and BUC/SSPA which might be some distance away.
your typical satellite modem will have an RF interface either somewhere between 70 to 140 MHz (where it's intended to be upconverted/downconverted by the LNB and BUC/SSPA at the antenna), or somewhere between 1100 to 1900 MHz, both intended for attachment to low loss coaxial cables. This works fine if you're putting the modem fairly close to the LNB and BUC/SSPA. If it needs to be a hundred meters away or something, it's a lot of RF loss, and path loss/link budgets in geostationary satellite are already hard enough without introducing any more loss at the ground side.
https://www.comtechefdata.com/products/satellite-modems
I spent two weeks there, during the commissioning of the Green Bank Telescope (GBT). Our team was designing the monitor and control system for an upgrade for another NRAO telescope, the Very Large Array in New Mexico. The team from the GBT led us through their design during the day; our nights sleeping in the on-site dormitory, complete with the break room where Frank Drake came up with his Drake Equation estimating the number of extraterrestrial civilizations...
Those old diesel trucks!
The GBT is so big, it's just wrong. Experiencing the forest moon of Endor, in real life.
(The single-dish GBT is sensitive to near-field RFI, whereas the multi-dish Very Large Array is a bit more tolerant. The VLA isn't restricted to antiquated diesel vehicles. Although they do ask visitors to power off cell phones and refrain from any microwave ovens that RVs might bring in.)
The NRAO should kickstarter a new, electronics free diesel fullsize.
Not to build it, just to prove how much demand exists for it. Because this is something every truck guy I know has been asking for forever.
There's even an online rebellion of sorts over the new Hilux not being available here.
> electronics free diesel fullsize
I'd happily settle for embedded computer free anything. Or even just not-cell-network-connected and no touchscreens. The bar has dropped quite low at this point.
When has the hilux ever been available here? I've wanted one for over 20 years, but not enough to pay to import...
Not ever. But apparently there's some new model called the Champ that starts around 10k, and has people who want simple trucks raging out. For good reason, it's a solid looking simple truck.
An old-school, no-nonsense diesel truck with zero unnecessary electronics? I feel like it would get funded overnight
> Before retiring from NRAO (years after my interviews with him), Mr. Sizemore outfitted a new Dodge Ram extended cab truck as an RFI vehicle, a feat which was written up in USA Today.
Dead link but luckily archive.org has it.
https://web.archive.org/web/20140725075606/http://usatoday30...
This is an awesome article. I'm a HAM in an urban area trying to figure out how to operate in the mess that is my EM spectrum with low power gear. It's a fun challenge, but having some quiet would be nice!
I haven't had the pleasure of seeing this site, but I did have the opportunity to visit Sugar Grove Station (not too far away) while it was in operation. I had a friend stationed there while I was nearby, and took a detour to spend the weekend at his house on the base.
Seeing the massive old radio telescopes and the tracks they used for positioning them was something else. The scale is hard to communicate; it's kind of like the first time you get up close with a Navy Aircraft Carrier. It's hard to fathom just how BIG they are until you are next to them.
Were you allowed on base? What was your experience like and your perception of what was going on?
I had the opportunity to perform a bat survey at Sugar Grove, and a poor guard had to come out to keep an eye on us until 3am because we couldn't be left alone. We noted curious wooden gazebos positioned around a featureless meadow, hinting at significant manned infrastructure underground.
Unlike the Green Bank Observatory from the above article, Sugar Grove was piggybacked on the National Radio Quiet Zone so the NSA could intercept intercontinental telecom traffic as a part of the ECHELON network. The cover story was that it was a run-of-the-mill AT&T site, but was an open secret for all the Pendleton County WV locals that it was a spy site. The base was also home to the best restaurant in the whole county, which isn't saying much for a single-traffic-light county.
https://en.wikipedia.org/wiki/Sugar_Grove_Station
https://en.wikipedia.org/wiki/ECHELON
Yes; I was cleared to the level required (but not need to know) and the visit was approved by his (the base) CO. He was stationed there as a Crypto Tech, and though I couldn't see the really neat underground stuff I was mostly free above ground as long as I was chaperoned by him. He gave me quite the tour.
The gazebos are there due to the underground facilities, yes. There is likely a whole lot more than even you realized.
As for my impressions: I was a Security Manager for a more operational side of the Navy for years (later). I informed a lot of my edge case thinking with what I saw of how they handled things there. I don't know that I really want to go into more detail than that.
I can only imagine what it must have been like standing next to those giant dishes and realizing just how massive they really are
One of my favorite parts about the old perkins diesel engine in our boat is that you need to press a button to stop it from running once started. You turn off the ignition and it just runs on physics until you do something to interrupt the fuel or air supply.
Diesels diesel (the verb). It keeps them exciting.
I’ve been in a friend’s car while it ran away on motor oil passed by a failed turbo. Turning it off didn’t stop the engine.
The scariest story I've heard was a parked diesel pickup truck going runaway acceleration because of the hydrocarbon vapours in the air due to an industrial accident.
They abandoned the pickup and it subsequently got blamed "A diesel pickup truck that was idling nearby ignited the vapor, initiating a series of explosions and fires that swept through the unit and the surrounding area".
I read about it in one of the disaster reports about the Texas City BP refinery explosion. Ugly mistakes were made.
> I read about it in one of the disaster reports about the Texas City BP refinery explosion.
Relevant part of USCSB accident reconstruction animation: https://youtu.be/goSEyGNfiPM?t=550 (but worth watching the whole thing!)
I grew up in this area of West Virginia, it's such a crazy thing that a community of really amazing scientists are nestled in the middle of this incredibly rural area. It's really neat to see the old blue trucks if you take the tour, and the Cass Scenic Railroad is just nearby and gives a really beautiful view of the telescope array. The National Youth Science Academy Camp is also surprisingly located nearby, it was wild as a kid knowing that this batch of future scientists were flying in from all over the country and once I learned of it I wished I'd studied a bit harder. Such a beautiful, strange place.
I imagine that there will come a time when they’ll need to revert to horse and wagon transport at the site. Or perhaps lay down railroad tracks and use cable cars.
Up until the 2000s diesel engines in cars used mechanically controlled injection. With those, once started, the engine will run without any electronics.
Engines produced for industrial applications (such as tractors) in developing countries still use this, as it's a lot simpler and more reliable. Military trucks are the same. Just don't tell the EPA.
You can buy what is basically the same engine new. https://quadstartuning.com/products/amg-gep-optimizer-6500-l...
I have a 10kW diesel motor that doesn't have any wires at all, no battery. It's my SHTF generator for my well.
I might have to wind a generator motor if the reason stuff went bad is because of emp, but otherwise, yeah, you can buy 100% mechanical diesel engines still.
They could get one of these https://www.offgridweb.com/transportation/toyota-gibraltar-t...
> Land Cruiser
Not a great idea, those engines like to blow holes in their pistons...
In 2006 my friend and I decided to stop talking about visiting the NRAO and actually go. We picked a weekend and then discovered that that Sunday was the 50th Anniversary open house! There were special exhibits and more of the facilities were open to tours than on regular visitors days. I can highly recommend visiting if you get the chance.
Coincidentally, my friend's last name is Blonder! And he's related to the Blonder-Tongue founder. According to my friend, all Blonders are related, the family name was originally Gottlieb, but was changed to something more Anglo sounding, to avoid anti-semitic discrimination, probably when they immigrated to the US from Russia.
So there are good reasons, aside from reliability, efficiency and ease of repair, for having a 1981 Diesel Chevette with a 100% mechanical engine :)
> Here he monitors the gross violations of the Quiet Zone and also looks at the local environment: powerline noise, illegal use of radios, etc. For example, at the time of my visit there, the amateur radio bands were being used improperly by a group of people and the signal was strong enough to overload the 140-foot telescope, so it became a serious problem... The likely action taken will be that he calls the FCC in to enforce the rules in place. After 20 years on the job, Wesley has built up a network of contacts he can call upon when he needs help. One of those contacts is the man in charge of the Enforcement Bureau at the FCC, whom Wesley knew when he was still a satellite technician.
Always interesting to hear examples how effective coordination often comes down to networks of people-connections that get built up over time. Software folk often think it's simply automating whatever process -- I certainly thought that early on -- but more and more I'm seeing it's about knowing the person in the right role with the right experience. Your personal network is leverage.
The last two sections about helping out a grumpy farmer with an old burned out amplifier and coordinating secret fly-overs with the Cheyenne Mountain guys are also great people-network stories.
I wonder how many of his critical contacts at the FCC have been fired by Musk
The bit about the old diesel cars still being in service because modern ones generate too much RFI is both fascinating and a little surreal
It's a shame we don't better contain all the EM noise emanating from our modern vehicles.
I'm dealing with this issue right now on my boat (EM noise from hydraulic trim pump for the drive leg is coupling to a power supply line running to a more sensitive electronic component).
Since the unwanted interference is from sparkplug, I wonder - assuming it would contain no additional electrincs, could they get some EV? Or does the electric engine itself generate noise by necessity?
EV are so noisy they talked about doing away with AM radio in the US because the EV jams it.
I am unsure what would lead to this question...
hm, yea, I guess it was a dumb question. Spinning magnets for sure must generate noise.
I wonder if any of the currently produced cars will have seats still comfortable after so many years. Probably, no.
The seats weren't really all that comfortable to begin with. However, you can rebuild the seats. LMC Truck has rebuild kits with new foam and covers. You can even add heated seats.
My 1986 early model E30 leather sport seats are still nearly perfect.
1987 E30 owner - even after getting the mold out during a restore, and in spite of a crack in the bolstering, the E30 sport seats are the _second_ most comfortable I've had the pleasure of owning. The seats in these old cars definitely have something up on modern leather seats, even its 27-years-older brother (4-series) that I drive daily.
The champion in that department, though, was the 1986 Volvo 740 that I briefly owned. Those seats were perfect in nearly every way.
Those are what you need after an EMP blast.
Green Bank is great. I have ties to E WV and made a trip there one time after hiking Seneca Rocks. Highly recommended if you get a chance.
https://ibb.co/N2RYW8vr
I suppose they removed the alternators, and that's why they keep them plugged in?
Diesels use glow plugs to heat the cylinders prior to starting, to explain why sibling mentioned needing to keep them warm. Luckily resistive heat doesn't make RF noise, at least not that I've noticed. But they could also garage them with potbelly oil burners, too.
No, they were plugged in to supply power to the block heaters. These kept the oil warm so they were easier to start.
I wonder what signal processing methods exist to deal with terrestrial noise sources instead of relying on the brute force approach.
Not sure what you mean by the brute force approach. The problem is that the terrestrial noise sources are many orders of magnitude stronger than the faint signals that the ultra-sensitive receivers are designed to receive, and easily saturate them. The only recourse is to excise any data taken during an RFI episode. It would be extremely difficult, if not impossible, to do science in many RF bands of interest were it not for the NRQZ.
Not who posted the parent comment, but "brute force approach" = having the NRQZ I'd imagine.
I figured as much. The question about why it is needed brought to mind something I was told when I started work there, over three decades ago. It was something along the line that all the signal energy recorded by the observatory’s telescopes integrated over their lifetimes amounted to less energy than is expended by one flea making one jump. I don’t know exactly how accurate that is, but it does rather vividly illustrate the problem.
I wonder how they start them. Park at the top of a hill?
I feel like they could probably buy some 80s Mercedes 300d and get newer cars with lots of parts available as there's junked ones everywhere.
I would argue the 6.2L/6.5L Detroit Diesel is a superior choice in North America, which is the engine used in the article.
The 5.9L 12-valve Cummins is also a fine choice. Another fully mechanical engine. In theory, with a manual transmission, you can operate a vehicle without even a battery after it's started.
Well, almost. The 5.9L fails safe: there is a fuel shutoff solenoid which operates in reverse: you give it power to keep the fuel flowing. You’d need to modify it to force the solenoid open (or remove it).
The OM617 (as used in many 1980’s Mercedes sedans) fuel shutoff operated on vacuum, and once started, the engine would run with no electrical system at all.
But the ECM?
What ECM? They're mechanically injected diesels. The main purpose of the electrical system is to run the starter to crank the engine. And maybe headlights and stuff.
They're very simple cars.
Netstumbler!
Grew up around some farm trucks that were electronic free diesels. My grandfather called them "luddite diesels". Later in life I realized the humor, considering that a diesel engine is a technology, and that luddites likely prefer horses...
No, the technologies that the Luddites disliked were very specific and regional. They only cared about machines that threatened their own personal jobs, not anyone else’s job.
Okay, loomer.
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