Well, you *can* but I suspect that you might end up doing a really
good job of learning more about Jesus. If you don't meet him, you
might say his name a few times rather loudly.
Sorry. I'll stop now. :-)
And, and also learned the Jesus Method of finding out which
breaker connects to a certain electrical outlet. requiring a
six or so inch length of 12 or 14 gage wire, with about an
inch of each end stripped. Often with the ends gently
Haier central a/c condensing units --made in China--have a little
warning sticker in them that I get a good chuckle out of. They have a
little circuit board that is a time delay to prevent short cycling which
they refer to as a PCB, and they refer to the 24 volt thermostat wires
as"communication wires" The sticker says "Make sure that the
communication wires are not hooked up to the line voltage or it will
cause the PCB to be out of work" Larry
I used to fly sailplanes. Because these non-powered aircraft sometimes
land away from the airport, they're designed to be broken down into
pieces so they can be loaded on a trailer. Part of every preflight
inspection was examining the removable pins that held the wings on,
which everyone referred to as "Jesus pins."
As a broadcast engineer working around large tube type transmitters,
one has to be mindful of residual high voltage in the equipment.
There is always an insulated pole with a metal hook and grounding
conductor attached that is used to discharge any dangerous stray
current. It's called a "Jesus Stick". The things can also be seen
hanging around any high voltage equipment facilities.
I worked in brodcasting for decades and never heard it called that.
Also, I only saw them in small transmitters. I've been inside some big
transmitters, including the 500KW WLW transmitter. The only TV
transmitter I saw with a shorting stick was 500 watts. The 195 KW UHF
transmitters would either vaporize a shorting stick, or destroy the HV
Have you ever been inside one of the Harris solid state AAM
transmitters with a high current 300 volt DC power supply? It will kill
you just as fast as any tube transmitter.
NO EXCREMENT?! I was out in the Marshall Islands 20 years ago and
got to explore the old phased array radar installation on Meck
island at the Kwajalein Atoll. I think it had two power supplies
at one time but there was one left in what was called the Frankenstein
room, an incredible contraption that looked like the set of a monster
movie. I wish I still had pictures, darn. There were Jesus sticks
hanging all over that place. You did notice that I wrote "stray
current"? You probably got into the field after the advent of
Affirmative Action when dangerous items had to be hidden away from
quota hires because of the death and destruction they were capable
of. "Hey, what's this big red thing for?" Here's a picture of the
outside of the building, I wish I had a picture of the interior.
I saw the first in the late '60s.
If you want to see an impressive power supply, visit WLW in
Cincinnati, Ohio. The transmitter has multiple, large plate
transformers to supply the transmitter.
We had a pair of 2 MW Westinghouse RADAR systems at Ft Rucker in the
early '70s across the hall from the Weathervision office. A lot of
transmitters drop the plate relays when any interlock trips. It shuts
down the incoming AC line to the HV power supply, which is quickly
dissipated through the final tube or tubes. Permanent sets of bleeder
resistors keep the dielectric from recovering any voltage
There was nothing Affirmative Action at the stations i worked at.
The TV transmitters at the AFRTS station I worked at was six feet from
the control console, the processing racks directly behind the operator,
and the film chain was next to the proc racks. No video tape and all in
Several radio stations had the transmitter in the control room, from
the days when someone with a FCC ticket was required to be there while
they were on the air. The only TV transmitter that was in a separate
room was at the WACX transmitter site in Orange City. That wasn't to
keep people away, but for the noise and cooling requirements. The small
service area was in a room off the transmitter room, where you could
barely hear what you were working on. That was a mid '80s Comark with
three 65 KW Klystrons. I don't know if they modified it for DTV, or
replaced it, since I haven't been to that site in 20 years.
One station I consulted with has their transmitter in the hallway
leading to the studios. An old 5 KW Gates, from the '50s. A couple
relay racks next to it hold the antenna and power controls for day &
night power and pattern controls. A real outdated mess, but like many
small stations, the owners believe that they can't afford to replace it.
Did being that close to them make you sterile? *snicker*
I knew this one freak who bragged about aiming his radar
dish at the passing natives when he was in Nam. His goal
was to cook their gonads. I wish I had been able to get
into the deep space tracking radar when I was out at the
missile range back in 88. One of the guys told me that it
used a TWT setup and ran at upwards of 8 megawatts on VHF.
When there was a mission going on, we were prohibited
from using the VHF marine radio on the crew boat. It was
amazing to see that huge dish move. I found a picture:
If you zoom in on the right side of this image you can see
the big dish from a satellite:
Geez! I wish I could get back out there, I loved it. It
was an amazing place.
That RADAR killed birds in flight and had multiple locked gates on
the stairs to the antenna platform where you had to remove the key to
open each gate.
TWT on VHF? VHF is 30 to 300 MHz and TWT are typically built for 300
MHz up which would put it in the 300 to 3000 MHz UHF range.
That 8 MW was a combination of antenna gain, and the fact that the
transmitter operated in pulse mode.
The prohibited communications on VHF was probably for security
reasons. There shouldn't be much RF on the sidelobes or rear of that
antenna. BTW, Microdyne built a lot of Telemetry recievers for deep
space work. In '88 they would have been building their 1100 series of
modular telemetry equipment. I think the 1200 series was introduced
sometime around that time, followed by the 1400, the 2800 (limited
production) then the 700 & 1620 as some of the last analog models. The
first DSP based models were the DR2000 & RCB 2000
NASA was still using a 30 year old Microdyne reciever to track probe
satellites in 2001. It had never been turned off, or serviced.
Have you seen the big dishes used by NOAA for their LEO wearther
satellites? I worked on the turnkey upgrade for their Wallops Island
installation that was built by Microdyne. It replaced a 20 year old
Harris microowave system and had to control their 100 foot dishes.
<http://www.photolib.noaa.gov/brs/spind10.htm has a few pictures.>
We also built the pair of tracking stations for the European Space
Agency. One fixed site, and the other mobile.
My bad, that ALTAIR installation is a wide band radar with what I assume
are multiple feeds. I really wish I knew more about it and had been able
to get in and see the operation. It's been 20 years and I remember the
fellow I spoke with telling me of the enormous power of the darn thing.
I do specifically remember being told that it used VHF frequencies in
some modes. There is a story of it being aimed at a Russian trawler that
hung around the islands. The tale speaks of the power being ramped up
until smoke came out of the boat which made a quick exit from the area.
You obviously have had more experience with neater and higher power
stuff than I've had. Is it OK if I envy you? *snicker*
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