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

40-190 weak volume
#1

Well, I put this set on the back burner for a week or so. after recapping and replacing all the resistors and cleaning the contacts and controls, i couldn't get her to play. Funny thing was the set did play when I went to get it, I know I heard it!!!! So i figured the tubes must be okay, right???? Wrong! I pulled the tubes and tested them and all but the 7B7 either had shorts or were weak at bestIcon_thumbdown Too bad as they were all Philco tubes, probably the originals as it looks like this set has never had any service. So I ordered a set of NOS tubes from Bob Dobrush. They came today and I installed them. The set is now kind of working, except that the volume is weak. I get stations all over the dial and even on the presets and they are close to where they should be on the scale. Volume and tone controls work except I have to crank the volume up to full to get any thing. i have the set hooked up to my 40-150 antenna for testing. I haven't gone to far into it yet, but the voltages I've checked so far seem to be normal. I don't think it's in the audio as I get very loud static if I work the preset buttons back and forth. I was just wondering if any one here might have any tips or ideas on which way I should start. thanks!
Kevin
#2

Kevin, perhaps time to do an alignment on the radio? Just might perk it up a bit .
Jerry

A friend in need is a pest!  Bill Slee ca 1970.
#3

Check the primary on the output transformer.
Regards
Arran




Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
Philco 60 Squealing
Well, a wave trap is a trimmer in series with the coil so at the resonant frequency it provides a short to ground. This ...RodB — 10:07 AM
Philco 60 Squealing
Rod, My radio is run 7. The wave trap is on that schematic as shown in the picture. dconant — 09:21 AM
American Bosch Model 802 auto radio
Hi Arran ,  Thanks for your help with this radio.And especial thanks for letting me know to look it up under United Ame...Antipodal — 04:32 AM
Philco 60 Squealing
Usually a wave trap is for keeping IF signals from entering the antenna and from leaving the antenna. You feed an IF sig...RodB — 09:30 PM
Philco 60 Squealing
I just peaked it for the best signal at 600. NULL it for IF frequency, originally it would have been null for 500kh...Chas — 08:05 PM
Philco 60 Squealing
Wavetrap no longer matters.morzh — 05:19 PM
Philco 60 Squealing
Rod, I had checked out your suggestions but did not help. I did solder the ground rivets to the chassis as Chas suggeste...dconant — 04:52 PM
37-690 Bass Choke Replacement
Yeah, I know, Mouser and Digikey don't have "big iron" components. For some reason Philco was messing with the...Radiodial — 04:25 PM
37-690 Bass Choke Replacement
Yes, I just had to deal with that while repairing the 37-604 Philco. Exactly that value choke was gone. And the current ...morzh — 03:52 PM
37-690 Bass Choke Replacement
Ah, now where to find one. I've into this before on smaller sets, I now recall. Hammond makes one that is only rated...Radiodial — 03:27 PM

[-]
Who's Online
There are currently 5016 online users. [Complete List]
» 3 Member(s) | 5013 Guest(s)
AvatarAvatarAvatar

>