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

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

Philco 40-180 Volume
#1

I have a couple of Philco Model 40-180s that I have been working on. Both have been recapped and out-of-spec resistors replaced. My problem is that the maximum volume on both is not as loud as I would like. When I touch the top of the converter tube 6J8G (shows up as 7J7 in any schematic, as per production change run 4), volume improves dramatically for both. Any thoughts on what is causing this and how to make this volume improvement permanent?


Attached Files Image(s)
   


Messages In This Thread
Philco 40-180 Volume - by gdolph - 10-24-2022, 06:45 PM
RE: Philco 40-180 Volume - by Radioroslyn - 10-24-2022, 08:17 PM
RE: Philco 40-180 Volume - by radiorich - 10-24-2022, 08:24 PM
RE: Philco 40-180 Volume - by morzh - 10-24-2022, 09:29 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 42-345 Restoration/Repair
So far still no broadcast, I am posting pictures of #14 Oscillator and also a resistor #27 which connects to an XXL tube...osanders0311 — 04:02 PM
Part numbers to model cross
I believe there is that document, and I think we might have it in the Library.morzh — 03:29 PM
Philco 42-345 Restoration/Repair
Ok MrFixr55,  I have tried the DeoxIT D5 on the band switch and even though it has relieved the tension I felt when turn...osanders0311 — 11:11 AM
Part numbers to model cross
Is there a reference somewhere where you can punch in Philco part numbers and see what models those parts were used in?Jim Dutridge — 10:17 AM
Philco 42-345 Restoration/Repair
Hi OSanders, Look carefully at the band switch. Turn it slowly and "wiggle" it around the desired band. ...MrFixr55 — 12:33 AM
5U4 vs 5Z4 tubes
I think that RCA and GE introduced metal tubes in the USA in 1936.  I don't know if they were being made by RCA, GE or b...MrFixr55 — 11:20 PM
Philco 42-345 Restoration/Repair
Vlad95, Thank you for the stringing guides and wow there are so manyosanders0311 — 06:01 PM
5U4 vs 5Z4 tubes
A pre war Hallicrafters, and an early one too, very nice! 1936 is pretty early for metal tubes too, which would explain ...Arran — 05:58 PM
Philco 42-345 Restoration/Repair
Thanks Rod, "When you hear the background hiss and no station it usually indicates that the oscillator quit" ...osanders0311 — 05:52 PM
Philco 42-345 Restoration/Repair
RodB :beerchug:Vlad95 — 10:22 AM

[-]
Who's Online
There are currently 1026 online users. [Complete List]
» 1 Member(s) | 1025 Guest(s)
Avatar

>