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Philco model 18 (code 121) - HELP!

Ok, I removed the coil and checked to see if any wires were broken, but I didn't find any evidence of any broken or missing wires, I figured I was looking for 2 wires. Here is what I found.

There are 2 wire wraps (as you said) but from top to bottom, yours are wrapped around the coil like a 'shirt' and 'pants' wrap along your body. Your pants are below the shirt along your length.

THIS one however is wrapped from top to bottom around the coil like 'Underwear' and 'pants' where the bottom wire is wrapped an partially "buried" beneath the top wire, just as your underwear is beneath your pants. Only, it looks much closer like it would be if you put your 'Underwear' OVER your 'pants' because the wire underneath goes the full length of the coil, and the wire on top only runs 1/5 of the length of the coil....make sense?

Maybe you knew that was the case already? I just wanted to make sure we all know what this thing looks like. Ok, now that we're all done laughing, about putting on your underwear over your pants, back to this coil issue.

From this point, I noticed 6 wires (but I know there are only 2 actually) wrapping around and connecting to all 6 posts or tabs. The 2 ends of each wire (making 4 ends of the 6 total) wrap around the coil and hook to 4 of the 6 tabs. Good so far.

Somewhere in the middle of each wire, before the end of each wire is finished wrapping around the coil, a loop from each wire is made when the end of the wire submerges INTO the coil (through a hole) and then wraps around the 5th (or 6th) tab, and then comes back to emerge from that same hole in the coil for the final wind around the rest of the coil and then back up to connect to the end of the 5th (or 6th) tabs, completing all 6 connections.

So we have 2 wires: 4 wire ends and 2 wire 'Loops' for a total of 6 contact points. None of the lines seemed broken, and all 6 connections were soldered to each of the 6 tabs.


So....I looked at the schematic and thought that I maybe I made a mistake the other day in my OHM readings. I then tried to bypass the coil by connecting the alligator clip from the plate on the R.F. #78 tube to the tab on the #12 cap. I also tried to bypass the shadow meter by connecting the alligator clip at the plate on the I.F. #78 tube directly to the #12 cap.

Those are the by-passes I used to see if either the coil or the shadow meter were bad. I would tell the results, but I forgot!

I think I was up to 2 am last night?? Not sure.

I'll check again later tonight and post results from both bypasses. I do know this, one showed 270 volts on BOTH #78 plates, and the other bypass showed no change...

....more to come.


Messages In This Thread
RE: Philco model 18 (code 121) - HELP! - by morzh - 02-07-2013, 09:22 PM
RE: Philco model 18 (code 121) - HELP! - by morzh - 02-08-2013, 09:32 PM
RE: Philco model 18 (code 121) - HELP! - by Arran - 02-08-2013, 09:49 PM
RE: Philco model 18 (code 121) - HELP! - by morzh - 02-09-2013, 01:21 PM
RE: Philco model 18 (code 121) - HELP! - by morzh - 02-09-2013, 04:57 PM
RE: Philco model 18 (code 121) - HELP! - by morzh - 02-09-2013, 05:12 PM
RE: Philco model 18 (code 121) - HELP! - by morzh - 02-13-2013, 07:40 PM
RE: Philco model 18 (code 121) - HELP! - by morzh - 02-21-2013, 04:25 PM
RE: Philco model 18 (code 121) - HELP! - by morzh - 02-28-2013, 05:04 PM
RE: Philco model 18 (code 121) - HELP! - by morzh - 03-07-2013, 03:16 PM
RE: Philco model 18 (code 121) - HELP! - by morzh - 03-07-2013, 10:20 PM
RE: Philco model 18 (code 121) - HELP! - by morzh - 04-17-2013, 12:25 PM
RE: Philco model 18 (code 121) - HELP! - by morzh - 04-18-2013, 07:48 PM
RE: Philco model 18 (code 121) - HELP! - by morzh - 04-18-2013, 08:49 PM
RE: Philco model 18 (code 121) - HELP! - by Pithicus999 - 04-25-2013, 03:04 PM
RE: Philco model 18 (code 121) - HELP! - by morzh - 04-29-2013, 09:02 PM
RE: Philco model 18 (code 121) - HELP! - by morzh - 06-12-2013, 12:37 PM
RE: Philco model 18 (code 121) - HELP! - by morzh - 06-13-2013, 07:33 PM
RE: Philco model 18 (code 121) - HELP! - by morzh - 07-23-2013, 09:33 PM
RE: Philco model 18 (code 121) - HELP! - by morzh - 07-24-2013, 10:11 PM
RE: Philco model 18 (code 121) - HELP! - by morzh - 08-02-2013, 04:06 PM
RE: Philco model 18 (code 121) - HELP! - by morzh - 08-21-2013, 09:26 AM
RE: Philco model 18 (code 121) - HELP! - by morzh - 12-17-2013, 09:58 AM
RE: Philco model 18 (code 121) - HELP! - by morzh - 12-19-2013, 11:47 AM
RE: Philco model 18 (code 121) - HELP! - by morzh - 12-19-2013, 07:48 PM
RE: Philco model 18 (code 121) - HELP! - by morzh - 01-17-2014, 03:05 PM



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