Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

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: 1 Guest(s)
[-]
Recent Posts
HiFi (Chifi) tube amp build - but my own design.
It's the other forum. I'm also in DIY, but mostly read there. Honestly, I kinda jumped into this without much thought to...TV MAN — 10:43 AM
Philco 71 Code 125
Hello,  I am in need of a schematic for this radio. Mine has the three separate circular tube shields and a shadow me...dconant — 08:06 AM
Stromberg Carlson 1500 Squeal
And life just keeps getting more complicated.dconant — 07:57 AM
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting.  IF alignment went great, almost all was already spot-on.  Adjusting on th...glyphmon — 11:35 PM
54C Complete Teardown/Rebuild
The main problem with adding a Bluetooth input is that this set lacks a traditional power transformer to isolate it from...radiorich — 11:19 PM
54C Cabinet Refinish
I started stripping this cabinet before it got super chilly out because I knew I wasn't going to be able to work on ...glyphmon — 11:18 PM

[-]
Who's Online
There are currently 1735 online users. [Complete List]
» 1 Member(s) | 1734 Guest(s)
Avatar

>