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

Guitar Amp
#13

I pronounce it fixed. I replaced the rest of the e caps, put back together and found some of the cracking static came back until it warmed up. I pulled both boards and resoldered a bunch of suspicious looking connections. I put back together kinda loose to be able to flex things and pull again and had no sound at all! Huh ... so after some messing around I found flexing the board made the sound (and static) come and go and could see the output tubes flash inside (not sparking, you know -the look inside when the tubes are handling current). Well, I discovered the outputs were grounded through the screws and stand-offs that hold the octal tube sockets to the metal chassis! So, I went back and cleaned and tightened those screws very tight - quiet as a church mouse! So, if anyone has one of these amps with static/cracking noises and cleaning controls and replacing tubes doesnt completely quiet it, clean those studs or solder a ground to those to chassis ground. I still have a very light, low level hum, but I think it is the nature of the beast for the most part. It's not really HiFi, so it may not be completely quiet like a Fisher or Dyna.

If I could find the place called "Somewhere", I could find "Anything" Icon_confused

Tim

Jesus cried out and said, "Whoever believes in me , believes not in me but in him who sent me" John 12:44


Messages In This Thread
Guitar Amp - by TV MAN - 10-03-2019, 01:07 PM
RE: Guitar Amp - by morzh - 10-03-2019, 01:15 PM
RE: Guitar Amp - by TV MAN - 10-03-2019, 01:30 PM
RE: Guitar Amp - by mikethedruid - 10-03-2019, 01:41 PM
RE: Guitar Amp - by Eliot Ness - 10-03-2019, 02:31 PM
RE: Guitar Amp - by Ron Ramirez - 10-03-2019, 03:25 PM
RE: Guitar Amp - by TV MAN - 10-03-2019, 10:37 PM
RE: Guitar Amp - by Ron Ramirez - 10-03-2019, 10:39 PM
RE: Guitar Amp - by morzh - 10-04-2019, 09:48 AM
RE: Guitar Amp - by TV MAN - 11-23-2019, 12:36 PM
RE: Guitar Amp - by morzh - 11-24-2019, 04:09 PM
RE: Guitar Amp - by TV MAN - 11-28-2019, 12:05 PM
RE: Guitar Amp - by TV MAN - 12-15-2019, 08:07 PM
RE: Guitar Amp - by Ron Ramirez - 12-15-2019, 11:14 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco Model 38-7: what caps & resistors do fail typically?
Welcome to the Phorum Martin. I count about 9 paper caps, the 3 electrolytic caps and 2-Y2 safety caps to replace th...RodB — 09:44 PM
Part numbers to model cross
Jim, We have this index put together by Dale Cook but I don't think that is quite what you are looking for. The Parts...klondike98 — 09:37 PM
Philco Model 38-7: what caps & resistors do fail typically?
Yep the dim bulb test is OK but I'd definitely replace all those electrolytics before I did it. Since those #47 conden...klondike98 — 09:18 PM
Philco 42-345 Restoration/Repair
The resistor is a 2.2 Meg, it was the last one I hadn't replaced. The broadcast is coming in after replacing it.osanders0311 — 09:09 PM
Philco 42-345 Restoration/Repair
What does the resistor measure? I think it should be 3.3 Meg. If the oscillator coil has continuity and the resistanc...RodB — 09:03 PM
Philco Model 38-7: what caps & resistors do fail typically?
Good idea to check the coils... then I'll get hold of an incadescent light bulb and see what happens when the unit is sw...Musaeum — 08:49 PM
Philco 42-345 Restoration/Repair
I have that same set, ain't too much shortwave I like anyway.....it is a good AM DX set. PaulPaul Philco322 — 08:32 PM
Philco Model 38-7: what caps & resistors do fail typically?
Welcome to the Phorum, Martin! Open a new thread in Philco Electronic Restoration when you begin working on your 38-7. ...GarySP — 08:28 PM
Philco Model 38-7: what caps & resistors do fail typically?
Welcome to the Phorum! :wave: Here's the schematic for that radio from our digital library: Something to do bef...klondike98 — 08:05 PM
Philco Model 38-7: what caps & resistors do fail typically?
Hi all, on vacation in Montreal,  a friend of mine showed me a Philco Model 38-7 console radio from the 30ies. Mechan...Musaeum — 07:21 PM

[-]
Who's Online
There are currently 1036 online users. [Complete List]
» 4 Member(s) | 1032 Guest(s)
AvatarAvatarAvatarAvatar

>