Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Model 89 "Progress" Different coil issue?
#3

HI Bill,

Thanks, Yes, it could be different issues here, so I was going to verify this coil was correct, then move ahead.Using a loupe magnifier, I can see where thinner wire was wound on the temonals wth the thick wire.

As far as the alignment, I have tried just about everything. Slight offtune the IF, and detune the trimmers. At one point, I had it tuning almos the entire band, but then tuning the high end I'd reach about 200 then the squeal would happen. I have followed the alignment to the "T"to get back on track.

I have heard that some have had to hand pick a #36 tube because of issues. I only have 2 tubes to work with but they test on the high side.

Seems odd but If I removed the OSC grid cap, the set would receive (weakly) across the whole band. I tried placing a .01 cap in series with the cap, and it did pick up ok, but there was a very slow oscillation depending on the size of the cap.

I have gone over the circuit again, and everything seems in place, but I think somehow a signal is getting back to the OSC tube and overloading something. I"m not good at working with coils as far as troubleshooting. I have looked at lead dress, moving wires, etc, no change.
The voltages also seem ok when it's receiving. It is pretty sensitive when it does receive.

I know Ron's probably busy, but I am going to keep this coil out until I can find what this winding should consist of.
Well, I'll check back later and I'll see if I can find the ARF thread you are talking about.
Take care,
Gary.


Messages In This Thread
Re: Model 89 "Progress" Different coil issue? - by gary rabbitt - 08-21-2009, 11:32 AM



Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
12' Philco
If it is 12', either Kareem or Andre would have to jump pretty high to look at the front panel. Kareem would have an e...morzh — 01:48 PM
12' Philco
And here's a story about the tires on the truck. Same "no-stoop" guy must have installed these! Take care a...GarySP — 01:17 PM
Hickok AC51 tube tester
I think they have only shown the secondaries of the transformer. Two of them feed the rectifiers' filaments.morzh — 12:58 PM
IF can wire size and Rubber mounts?
Arran If the wire inside cans is the gauges you mentioned, the sole reason for that would be mechanical, to stiffen t...morzh — 12:56 PM
12' Philco
Rod, Yes, I know, but the Giant Philco is not around anymore either, so I go by whoever was alive fairly recently. H...morzh — 12:54 PM
Hickok AC51 tube tester
Absolutely no one is going to reverse engineer that circuit. Even the iron core is missing.RodB — 10:37 AM
IF can wire size and Rubber mounts?
Thanks to both members for your help regarding wire and tuner mtg supports. regards--Johngeorgetownjohn — 09:33 AM
Hickok AC51 tube tester
Note that no power cord, power switch, or power transformer switch are shown. That (along with my experience with full s...DaleHCook — 07:09 AM
IF can wire size and Rubber mounts?
A pair of wire strippers can give you an idea of what the existing gauge of the wire leads are in the IF can, I think it...Arran — 06:07 AM
My last cabinet for this year
Hello Dan, That is really beautiful what great looking radio you have ! I have friends who live in Calgary and the wea...radiorich — 01:51 AM

[-]
Who's Online
There are currently 5240 online users. [Complete List]
» 1 Member(s) | 5239 Guest(s)
Avatar

>