First, you stupid idiot, you can't apologize. Second, you have only but to beat me in a flame war, which will be impossible, considering what a numb brain you are. However, I await your victory, with eagerness. Give it all you got, twerp. :~)) Mashed nose, and double chins. That's me.
. Christ> Stormin Mormon wrote in
My brother was wearing one of those fancy Twist-O-Flex metal watchbands which turned it into a heater element. I remember the TV commercials for them from so many years ago. ^_^
TDD
I only put the ammeter across a load that won't damage the meter, I did mention that first. The shunt in my meter is good for 20 amps and I certainly wouldn't put it across a circuit that would exceed the safety limits of the meter. That's why I only do it for low current loads. The little circuit breakers with test leads help narrow down a problem with an overload while saving fuses at the same time. I may be assuming that others know enough not to do anything unsafe but I don't want to appear patronizing. I'm only giving general information from my own experience and I hope no one believes the same procedures work with dangerous high voltages and currents. ^_^
TDD
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
TDD
With your luck, a whole load of spirits will come back from the other side, to tell you how they followed your advice and had their meters blow up in their faced, and now they are dead. Just can't win some times.
Anyhow, I did learn a bit, and thank you for that.
. The Ghost Of Christ>> Not a good idea to put an ampmeter test probes across a fuse. Chances >> are
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.
. Christ>> Lightening hit our tower in Germany, basically melting the antenna >> coupler
Stormin Mormon wrote in news:58q0u.96295$ snipped-for-privacy@fx07.iad:
Is there any other kind of idiot? Whoever heard of a smart idiot?
My barbecue is out of gas and I've been too lazy to get new cylinders.
My brain is NOT "numb". I poked it hard the other day and it really hurt. Or maybe that was my butt...
You mean "twerk", surely? Nobody says "twerp" anymore.
I surrender. I'm just no good at flaymin.
. Christ> Stormin Mormon wrote in
Heh, give him a break. At least he admitted he got it wrong, which is something rare here. But he's kind of gotten it wrong a second time. He seems to be ignoring skin effect. With DC, the current density is uniform in a wire. As the frequency increases, the current distribution moves toward the surface. At very high frequencies, most of it is traveling at or near the surface. The wire could be mostly hollow and it would carry almost the same current.
Let's not forget waveguides. ^_^
TDD
" snipped-for-privacy@optonline.net" wrote in news: snipped-for-privacy@googlegroups.com:
Ah, I see. Would this be true regardless of voltage or amperage?
At high frequencies the current is mostly on the outer portion of the wire. At 60 Hz the skin depth is about .33 inches. That is for 67% of the current. The wire wold have to be larger than .66 inches to make much differance. Not too many are going to see that around the house. Even 4/0 wire is only .46 inches in diameter.
When the frequency gets to up 1 Mhz or more then the hollow tubes will start to carry almost as much current as the solid wire.
Did you ever try the light bulb instead of a fuse ?
Depending on the normal load, you can use a 100 watt light bulb (wattage to vary depending on normal current usage) in place of the fuse. When the light bulb glows much dimmer or not at all then you have found the problem that usually blows the fuse.
Putting the amp meter across the fuse will not depend on the load, but the actual ammount of current that can be sourced. Say the normal load is only
10 amps, your meter is good for 20 amps, but the source is good for 100 amps. If you have an almost short at the load, close to 100 amps is going to try and pass through your 20 amp meter which is now toast , or hopefully the internal meter fuse blows.You should only put the amp meter in line when you get the fuse to stop blowing. Then it should be safe to see how much current is actually being used.
I'm not worried. I think the other person and I are just busting chops. No harm done, I hope.
. Christ> >> I surrender. I'm just no good at flaymin.
We've been discussing this so often, it hertz. That's how frequently we're discussing.
. Christ>
The NEC used to have correction tables for skin effect. Consistent with what you wrote, there was only a correction for large wire. I assume the correction is now included in the ampacity tables.
I agree with the rest, but this in particular. Might be safe across the fuse in something like an amplifier. Power fuses you had better have a CAT rated meter, as in another post. A meter would seldom have a high enough amp scale anyway.
Yeabut his error is not a bad as top posting.
Yes.
Stormin Mormon wrote in news:7rC0u.112119$ snipped-for-privacy@fx20.iad:
It's been an electrifying thread. And I've learned so much from it.
HomeOwnersHub website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.