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

Cone sentric tuning questions
#1

Am in the final redoo of a 38-7, (still need a range 1 ant. coil).Have listed in wanteds. Question here is How do you change the cone presets?
I assume they loosten by unscrewing somehow and then tightning? I have tried using a screwdriver on the large slot in the tuning knob while pressing in on it while engaged on a cone but nothing catches to do anything. Is that how you supposed to do it?
Also the muting wire was removed so I re-connected it and got a lot of noisey static when tuning. Was that a weak spot and previous repairman removed it?
This set also had a tuning capacitor problem I've never encountered.
The osc. section on the lower 1/3d of the travel the rotor plates shorted out on the mounting of the stator. about half of the rotor plates touched and I ended up reducing the rotor slightly with a dremmel sander. I'ts ok now, just never had that problem before.

Anyway need advice on the cone adjustments. Also how to remove the fine tuning knob to replace whatever was there for friction.
Don


Messages In This Thread
Cone sentric tuning questions - by tubadon40 - 07-06-2012, 10:42 PM
RE: Cone sentric tuning questions - by FXpert - 07-07-2012, 07:20 AM
RE: Cone sentric tuning questions - by tubadon40 - 07-07-2012, 12:48 PM
RE: Cone sentric tuning questions - by tubadon40 - 07-07-2012, 07:27 PM
RE: Cone sentric tuning questions - by tubadon40 - 07-09-2012, 05:06 PM



Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
Philco 42-1008 conversion kit
I read about a kit to convert the variable speed changer in the Philco 42-1008 into a single speed unit.  That would rem...alangard — 09:30 PM
HiFi (Chifi) tube amp build - but my own design.
Tim Well...a chassis is metal. Magnetic or not, it does not matter. A transformer has some hum to it. It is natural....morzh — 08:40 PM
Hickok AC51 tube tester
I thought the 83 tube was bad because it looked white but it tests strong. Blue gassy though. I checked the fuse, it was...martinj — 08:37 PM
Shadow Meter Bulb
Ross I am not sure what current limiting effect the incandescent provides. They are two different parts of the sch...morzh — 08:31 PM
12' Philco
Bob Thanks for that photo. I have been looking for it, and I cannot find anythinmg on the web. I forgot it was here...morzh — 08:29 PM
Shadow Meter Bulb
I think after all has been said, I will use the same bulb that is specified for the dial pilot light which is a #55. I ...georgetownjohn — 07:31 PM
12' Philco
There was also this Philco! klondike98 — 07:25 PM
HiFi (Chifi) tube amp build - but my own design.
I expected a challenge and this is just part of it. But, it's also supposed to be fun, entertaining, informative and enj...TV MAN — 07:12 PM
Shadow Meter Bulb
Butting in here with a question. Since the shadow meter is connected directly to the 1st and 2nd I.F.'s wouldn't the met...RossH — 06:43 PM
HiFi (Chifi) tube amp build - but my own design.
Mike, Tim; you are about to enter the twilight zone. Doo doo doo doo, doo doo doo doo This is something alright. I'm go...RodB — 06:26 PM

[-]
Who's Online
There are currently no members online.

>