Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

Thread Closed
Thread Rating:
  • 2 Vote(s) - 5 Average
  • 1
  • 2
  • 3
  • 4
  • 5

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



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
1930s Stewart-Warner Tombstone Radio need help identifying model number
UPDATE: I was able to pick up a signal generator on the cheap (amazingly enough) on feebay and I did an IF alignment fol...captainclock1988 — 09:53 AM
Philco 91 Schematic
Hi Rod, The resistor connects to pin 4 and the ungrounded side of block 9. From pin 9 of the RF tube to one side of ...dconant — 09:34 AM
Just got a 49-1613 need to know...everything!
I just found your post. I have this exact same model, and have had it since 1985 when I was 15 years old! I performed a ...MuzzcoVW — 09:11 AM
B&K 1077B no video
Hello Tim, I would if it's a leaky Capacitor So are all 3 of those B- voltages low then ? Sincerely Richardradiorich — 01:55 AM
B&K 1077B no video
I found a schematic and think I have the problem traced down to the minus power supply. I have very low voltages that go...TV MAN — 12:41 AM
RCA 15X
I'd try replacing the bulb first and if that doesn't do it, then change the 35Z5 and see if the problem goes away.NostalgiaRadioTime — 12:28 AM
B&K 1077B no video
Hello Tim, I have that exact unit in my shop too plus a Sencore unit there are times I like one or other !!. Sincerely...radiorich — 11:07 PM
RCA 15X
Everthing goes at once, maybe it's the cold weather, I have had 2 dial strings break and no my little RCA is having dial...Paul Philco322 — 10:26 PM
Philco 91 Schematic
Hi Dan, I can't explain this specific resistor but I have seen the use of a switch to apply B+ voltage to screen gri...RodB — 09:36 PM
6TPZ and 5TPO Radio Help
I suspect it's been repaired before. And I suspect whoever repaired it, wanted to re-use old transistors' pin stubs in o...morzh — 09:24 PM

[-]
Who's Online
There are currently 4539 online users. [Complete List]
» 2 Member(s) | 4537 Guest(s)
AvatarAvatar

>