Posts: 1,002
Threads: 9
Joined: Jul 2020
City: Greenlawn
State, Province, Country: NY
I used WD40 (gulp) to clean several toggle power switches for RCA Radiola 16, 17, 18 and 60 sets. However, this is before I bought the DeOxIt D and R5 Fader Lube when I got into restoring Audio mixers and PA systems.
I have an RCA 6BT that use 4 of those Mallory bias cells in the IF (-2V) and Convertor (-4V) AVC circuits (As if the bias developed by the AVC circuit was not enough). My 5BT uses 2 cells (2V on both the IF and Converter grids through the AVC circuit). Seems to work fine with the cells bypassed, but I am in a local area with plenty of stations and I run the radio on a power supply so I am not toasting B Batteries. The Bias for the Audio is an entirely different story. The bias voltage is there from 5 AA alkalines.
"Do Justly, love Mercy and walk humbly with your God"- Micah 6:8
Best Regards,
MrFixr55
(This post was last modified: Yesterday, 09:16 PM by MrFixr55.)
Messages In This Thread
RE: Restoring Philco 37-604C - by MrFixr55 - Yesterday, 09:09 PM
Users browsing this thread: 8 Guest(s)
|
Recent Posts
|
Restoring Philco 37-604C
|
So, I put the wires back to the power switch, plugged it in, slowly increasing the Variac output...nothing. No DC, not e...morzh — 08:40 PM |
Delco car radio Peko vibrator converstion issues
|
Rich,
There is an Australian website (Cool386.com) that has much useful info regarding repair and restoration of vibr...Joe Rossi — 07:29 PM |
Jackson 715 not working
|
Mrfixr55, its working now. I cleaned the switches and sockets with spray cleaner. Thanks for helping on this one.daveone23 — 06:26 PM |
Jackson 715 not working
|
Now that you posted the schematic, I don't know why that Sprague electrolytic cap is across the meter, as it is not indi...MrFixr55 — 05:51 PM |
HiFi (Chifi) tube amp build - but my own design.
|
What may be lacking in the PP Tube amps may be the 2nd harmonics, which some, especially RCA back in the day called &quo...MrFixr55 — 05:32 PM |
Jackson 715 not working
|
Usually in an emission tester, the tube under test is measured as if it were a diode. So, some testers connect all the g...RodB — 04:17 PM |
Restoring Philco 37-604C
|
Yep. F5 is green, D5 is Red.
Red is Bad.
Green is Clean.morzh — 01:30 PM |
Jackson 715 not working
|
I did start to do that but I stalled out because I could not figure out how the grid and plate get voltage. In this diag...daveone23 — 11:52 AM |
Restoring Philco 37-604C
|
(Insert Homer Simpson "DOPF" Here.)
When all fails, look at the can. Took the Ron Ramirez advice, red Caig D...MrFixr55 — 09:23 AM |
Philco 91 Speaker Replacement
|
From your text I am not sure if you intend to use the existing speaker with a resistor instead of the field coil.
It wo...morzh — 08:44 AM |
Who's Online
|
There are currently no members online. |
|
|