They also make an indicating fuse with a metal plunger that pops out
when it blows. These are usually used in a holder with a sense rail.
The plunger pops out, hits the rail and indicates a blown fuse.
(light, beeper or whatever)
On 9/21/2013 10:53 PM, firstname.lastname@example.org wrote:
I had fuses like in some surplus gear that had a panel mount fuse holder
equipped with a clear cap having a bubble in it that the plunger popped
up into when the fuse blew. The little tips of the plungers on some of
the fuses were painted red so they would show up more easily in the
bubble but it was easy to tell if the unpainted tips were in the bubble
window of the cap too. I suppose that little fuse would work in a fuse
holder that had an electrical contact to turn on an indicator light. I
had some fuses under the dash in my van that had a tiny LED which would
light if the fuse blew. ^_^
Light fuses sounds good. Since the fuse blows, and you likely still hvae
12 volts to work with. The 20 mA or so through the LED and resistor
won't do much damage to any thing.
Christopher A. Young
Learn about Jesus
On 9/22/2013 8:15 AM, The Daring Dufas wrote:
At work there are thosands of fuses. Many of them are in holders that have
neon bulbs for voltages over 100 volts and LEDs in them for the 24 volt
circuits. Makes finding a bad fuse easy most of the time.
Some of the larger fuses have a set of contacts on the side that are
normally open. When the fuse blows the contacts close and light up an
Have you ever seen a motorized circuit breaker controlled by a 3-strike
relay? We had them in the LORAN-C transmitters I used to work on. These
transmitters were subject to the random arc which would trip the high
voltage breaker in the power supply.
Picture a large circuit breaker above a motor with a shaft the rose out of
the top. When the motor was energized, the shaft pushed the breaker handle
up, energizing the high voltage Power Supply. (25K VDC max, steady state at
15K) the motor would then spin back down retracting the shaft.
Controlling the motor circuit was a mechanized relay with a timer and a cam
that opened and closed the relay contacts. If the transmitter arced and
tripped the breaker, the cam would rotate 1 position, start a 30 second
timer and power up the motor which would close the circuit breaker. If 30
seconds went by with no more arcs, the relay cam would rotate back to its
"normal" position and wait patiently for the next arc. If another arc
occurred within those 30 seconds, the cam would rotate one more position,
power up the motor, close the breaker and once again wait for another arc.
If, within the original 30 seconds a 3rd arc occurred, the cam would rotate
one more position and shut down the power supply.
At that point, if everything else was working properly, other circuitry
would automatically power up the standby transmitter and switch the antenna
coupler to the standby unit, putting us back on air in under a minute.
Were you in The Coast Guard? Those transmitters put out some incredible
power but I seem to recall them being shut down only to wind up being
considered as a backup because of the possibility of GPS being jammed or
knocked out by solar flares. Heck, the government will probably wind up
with some sort of system like it if GPS were to turn out to be somehow
vulnerable. As tall as the towers were for LORAN-C, was lighting a big
cause of the systems going down and switching to backup transmitters? o_O
I spent a year at USCG LorSta Sylt Germany. Sylt is a resort island in the
North Sea with casinos, all variety of night life and nude beaches. I paid
for it with a year at USCG LorSta Port Clarence Alaska. Night life
consisted of double deck Pinochle, hours upon hours of Cribbage and poker
with the Eskimos when Port Clarence Bay froze over so they could cross it
by snow mobile. I spent my last year as an instructor at the Loran training
center on Governor's Island, NY. My home town was NYC, so they basically
sent me home for my last year.
If I recall correctly, Loran stations across the globe began being shutdown
in the early 90’s. Many stations went solid state and unmanned years before
that. All remaining Loran C service was terminated in 2010. I don't know
which, if any, Loran chains are still available as backup for GPS. I do
know that some stations were dismantled and towers taken down.
Check out this video of the tower at Port Clarence.
Lightening hit our tower in Germany, basically melting the antenna coupler
transformer. We were off air for a few weeks while we waited for parts to
rebuild the antenna coupler and final amplifier stage of the transmitter
that was on-air at the time. I don't remember how it worked, but there was
some kind of system that handled most strikes without knocking us off the
air. This one was just too big.
Interesting fact about the construction of Loran stations: Even though the
guy wire system was designed to spin the tower basically straight down
should there be a tower failure, each Loran station was built so that the
closet building to the tower, other than the transmitter building of
course, was no closer to the base of the tower than the tower was high. In
the next-to-impossible case that the tower fell "sideways" it would miss
Since the weather in Port Clarence was an issue, we had a 1/4” mile
enclosed "hallway" from the main station to the transmitter building. No
heat and very little light, but at least we were out of the weather as we
walked (or biked) to the transmitter building. The inside walls were coated
with ice and there were snowdrifts inside the hallway where the snow blew
through the seams in the walls.
Darn, I lost the pictures I took when I worked at The Kwajalein Missile
Range back in the 1980's during the SDI "Star Wars" program. There were
some cool old and new structures out there for radio and radar use. I do
believe the big satellite dish for the down link had a cryogenically
cooled receiver or components to give it maximum sensitivity. There were
some abandoned old sites that still had the antennas and there was one
big concrete building that was used for the original phased array radar
development for the early warning and ships phases array radars.
I really wish I hadn't lost those pictures years ago. o_O
Wonder if the old antennas can be used for short-
wave listening, or some other use, now days?
I remember hearing a story that may well be true.
Someone in England during world war two, set up
listening post, and scanned the airwaves. Due to
freik of atmospherics, they were able to listen
to the tank corps of the Germans in Africa, on
about 28 MHz. This provided a bit of tactical
advantage to the English.
I remember in the late 1980s, I used to hear
Galveston, TX on my CB radio at home. I never did
talk to anyone. But QSL cards were popular then,
and so any time anyone gave out zip code and PO box,
I'd write and tell them they were coming through
in NYS. A couple of them wrote back.
Christopher A. Young
Learn about Jesus
On 9/25/2013 12:24 AM, The Daring Dufas wrote:
In the 70's working at NASA tracking station, we used loran to track cesium
clock drift. There was a special receiver for that. Loran C and D. The only
other way to measure cesium clock, was for them to bring in a portable
We also had cooled parametric preamplifier for the best noise performance.
The hydrogen maser was for deep space tracking, and there was another
simple transistor amplifier backup. Most amplifiers can be cooled to get
better noise ratio.
There was an atomic clock in one room of the mission control center I
was involved in building, in another room was a liquid cooled Cray X-MP
super computer. That was 1988, I read somewhere a few years back that
the university had a Cray X-MP they were trying to give away. ^_^
I'd not want a free atomic anything... too much
hazmat disposal fee.
Christopher A. Young
Learn about Jesus
On 9/25/2013 9:36 PM, The Daring Dufas wrote:
Letter Re: Manual Hair Clippers
I enjoy your blog very much, have been following it for years. Keep up
the good work.
On the many lists of items preppers are encouraged to obtain, I have
never seen hair clippers suggested. An essential item.
(By hair clippers I mean manual, not electric.) - Pastor D.
*JWR Replies:* Although they are probably still made in India and China,
the best place to find traditional clippers is /used/, via eBay or
Craigslist. If they are well-made and aren't rust-pitted, even a
century-old pair of clippers will probably last/another /century. Just
be sure to keep them well-oiled.
By The Spirit
8/15/2013 9:24 AM
The LDS folks have an expression "by the Spirit". When there is a big
decision to make, we pray and listen for the guidance of the Spirit.
And sometimes in every day life, we are prompted BTS to do this or that.
Yesterday was such a day. It was lunch time, and I was out to buy pure
gas if I could find it, and also to get some to eat.
BTS, I was prompted to go to a particular pizza shop. The last time
there, the pizza was burnt around the edge, and I didn't much enjoy it.
But, so, the Spirit is prompting and there I went.
The TV was on, and the woman was behind the counter. The over head
lights were off, plenty of sunshine coming in the windows. I remarked
how they were having a cool afternoon with the lights off, and doors
open. No, she says, the power is off. For some odd reason the TV and
cash register are fine, but the lights and all the refrigeration is down.
Asked if they had any slices, and they did. Cashed out.
As I got back into my truck, I realized why I was here. I have a bunch
of promo flashlights with advertising. So, I took a couple back into the
store, and gave to the woman at the cash register. She loved it! Said
she had a light on her keyring, but no longer has the same keyring.
So, I got a perfectly cooked slice of pizza, she got a keyring light,
and she says they have some work for me, coming up. The power is out,
and I'm handing out flashlights. What's the odds?
The Norwegians have an experimental thorium reactor working.
Article here: http://tinyurl.com/na8dqze
I guess there is less waste and it only has to be stored for 300 years
in some type of radiation containment structure.
Ahh...the circle of life.
The timing equipment that created the Loran signal was controlled by a
cesium beam oscillator.
We Loran techs sent out a really, really well timed signal so you could use
it to track drift on the same type of clock that was used to create the
Based on this timeline, Loran D went out of service in the late 60's. Are
you sure it was Loran D that you used in the 70’s? Loran C was used before
and after that timeline. I never dealt with Loran D, only A and C.
I'm pretty sure D, and I think it was an experimental station, and pretty
close by. The loran still drifts around. Only long term average was used.
I read D was a short range high accuracy, and portable.
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