- OT:Mystery spare items - 1 Update
- Need a schematic for a Fisher RS-717 receiver - 1 Update
- Why do these GFCI receptacles trip? - 5 Updates
| N_Cook <diverse@tcp.co.uk>: Jul 27 02:14PM +0100 > Morse connection. It might be worth looking through the "Popular cipher > machines" at <http://www.cryptomuseum.com/crypto/index.htm> to see if > any of the keyboards match. I had a good virtual rummage there, and nothing like them, I might take some pics and email them. Sometime I might try decoding the circumferential fluting, and the individual numbering of each letter, don't even know how many "bits" at this stage. There are also some "blank" keycaps, same overall form but no disc and so no letter . These don't look as though they,ve burst off as it seems all in one moulding, but individual number markings, and same coded? flutings |
| John-Del <ohger1s@gmail.com>: Jul 27 04:50AM -0700 > > John > John > What happens if you look at the discriminator output? What if you switch to FM mono? Maybe there is a circuit right after that output that "preamplifies the demodulated signal before it gets to the common audio circuits? Lenny No change in mono mode Len. In any case, it doesn't matter. Customer doesn't use FM so he picked it up yesterday. |
| freenews <freenews@freenews.com>: Jul 26 10:16AM -0700 My experience with Al is that a copper pigtail is required ! Use a wire nut with Al to Cu goop to keep from oxidizing. Cu then goes to the GFCI or switch etc. |
| bruce2bowser@gmail.com: Jul 26 08:13PM -0700 On Thursday, July 26, 2018 at 1:16:31 PM UTC-4, freenews wrote: > My experience with Al is that a copper pigtail is required ! > Use a wire nut with Al to Cu goop to keep from oxidizing. > Cu then goes to the GFCI or switch etc. Right. Use NoaLox, which is an anti-oxidant compound. Noalox stands for "No Aluminum Oxidation". It goes between copper and aluminum connections to SUPPOSEDLY stop fires. |
| Phil Allison <pallison49@gmail.com>: Jul 26 08:16PM -0700 Fox's Mercantile wrote: > > absorbs hf content so the gfci doesn't see much of it. > And in case it isn't obvious, that series combination is across > the AC line. Not on the switched side of the load. ** A simple check that a you have snubbed the switch off arc is to monitor the AM band with a radio tuned off station. The noise burst heard via the radio when you press the test button should be much reduced. ..... Phil |
| bruce2bowser@gmail.com: Jul 26 08:18PM -0700 > there is a good point. > I think there are GFI's that are calibrated for a little higher trip current. > Those might be worth a try. I guess GFI's can't be reset by just pushing a button, though. GFCI's can. |
| "pfjw@aol.com" <peterwieck33@gmail.com>: Jul 27 04:14AM -0700 > > I think there are GFI's that are calibrated for a little higher trip current. > > Those might be worth a try. > I guess GFI's can't be reset by just pushing a button, though. GFCI's can. The former is also a breaker, and so must go through the "OFF" position before resetting - as with any breaker. The latter is not, and need only be reset. Peter Wieck Melrose Park, PA |
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