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

40-201 now has power
#21

It turned out that the popping sound I heard was the second electrolytic capacitor in the B+ string which I had already replaced. This one follows the field core of the speaker. It is intermittently shorting during warm-up, so I will be ordering another one. This time I will get one that significantly exceeds the voltage rating of the original unit. The 80 rectifier puts out voltage before the rest of the tubes begin to conduct. It would be even worse if the power supply had solid state rectifiers instead of a tube rectifier. It is time to send a new order to Mouser Electronics. I will not be turning the radio on again until I have this problem solved.

Joe


Messages In This Thread
40-201 now has power - by Joeztech - 12-23-2013, 03:45 PM
RE: 40-201 now has power - by jerryhawthorne - 12-23-2013, 04:27 PM
RE: 40-201 now has power - by Joeztech - 12-23-2013, 06:45 PM
RE: 40-201 now has power - by jerryhawthorne - 12-23-2013, 07:13 PM
RE: 40-201 now has power - by Joeztech - 12-23-2013, 08:08 PM
RE: 40-201 now has power - by codefox1 - 12-23-2013, 08:56 PM
RE: 40-201 now has power - by jontz - 12-23-2013, 09:33 PM
RE: 40-201 now has power - by Paul Philco322 - 12-23-2013, 11:11 PM
RE: 40-201 now has power - by Joeztech - 12-24-2013, 07:33 AM
RE: 40-201 now has power - by Joeztech - 12-24-2013, 07:45 AM
RE: 40-201 now has power - by hsusmann - 12-24-2013, 10:14 AM
RE: 40-201 now has power - by Joeztech - 12-24-2013, 04:53 PM
RE: 40-201 now has power - by hsusmann - 12-24-2013, 05:53 PM
RE: 40-201 now has power - by Joeztech - 12-24-2013, 08:03 PM
RE: 40-201 now has power - by hsusmann - 12-24-2013, 08:53 PM
RE: 40-201 now has power - by Joeztech - 12-24-2013, 10:54 PM
RE: 40-201 now has power - by Radioroslyn - 12-25-2013, 11:15 AM
RE: 40-201 now has power - by Joeztech - 12-25-2013, 03:34 PM
RE: 40-201 now has power - by BrendaAnnD - 12-25-2013, 06:47 PM
RE: 40-201 now has power - by Joeztech - 12-25-2013, 07:05 PM
RE: 40-201 now has power - by Joeztech - 12-26-2013, 08:15 AM
RE: 40-201 now has power - by hsusmann - 12-26-2013, 09:53 AM
RE: 40-201 now has power - by Joeztech - 12-26-2013, 11:48 AM
RE: 40-201 now has power - by hsusmann - 12-26-2013, 10:54 PM
RE: 40-201 now has power - by BrendaAnnD - 12-26-2013, 11:59 PM
RE: 40-201 now has power - by Eric Adams - 12-27-2013, 01:50 AM
RE: 40-201 now has power - by Joeztech - 12-27-2013, 07:28 AM
RE: 40-201 now has power - by Joeztech - 12-28-2013, 01:28 PM
RE: 40-201 now has power - by Joeztech - 12-28-2013, 05:36 PM
RE: 40-201 now has power - by codefox1 - 12-29-2013, 08:30 PM
RE: 40-201 now has power - by morzh - 12-29-2013, 08:42 PM
RE: 40-201 now has power - by Joeztech - 12-30-2013, 07:17 AM
RE: 40-201 now has power - by Joeztech - 12-30-2013, 07:30 AM
RE: 40-201 now has power - by Joeztech - 12-31-2013, 06:33 PM
RE: 40-201 now has power - by jerryhawthorne - 12-31-2013, 07:54 PM
RE: 40-201 now has power - by Joeztech - 02-19-2014, 08:05 PM



Users browsing this thread: 9 Guest(s)
[-]
Recent Posts
6TPZ and 5TPO Radio Help
Quick progress report: X7 is broken. Only one leg soldered, the other missing and the diode is cracked. I've replaced...R3Sons — 05:05 PM
6TPZ and 5TPO Radio Help
Oh...and you have electrolytic caps there. All need to go and be replaced.morzh — 04:36 PM
6TPZ and 5TPO Radio Help
Thanks, will do.R3Sons — 01:25 PM
1930s Stewart-Warner Tombstone Radio need help identifying model number
UPDATE: I was able to pick up a signal generator on the cheap (amazingly enough) on feebay and I did an IF alignment fol...captainclock1988 — 09:53 AM
Philco 91 Schematic
Hi Rod, The resistor connects to pin 4 and the ungrounded side of block 9. From pin 9 of the RF tube to one side of ...dconant — 09:34 AM
Just got a 49-1613 need to know...everything!
I just found your post. I have this exact same model, and have had it since 1985 when I was 15 years old! I performed a ...MuzzcoVW — 09:11 AM
B&K 1077B no video
Hello Tim, I would if it's a leaky Capacitor So are all 3 of those B- voltages low then ? Sincerely Richardradiorich — 01:55 AM
B&K 1077B no video
I found a schematic and think I have the problem traced down to the minus power supply. I have very low voltages that go...TV MAN — 12:41 AM
RCA 15X
I'd try replacing the bulb first and if that doesn't do it, then change the 35Z5 and see if the problem goes away.NostalgiaRadioTime — 12:28 AM
B&K 1077B no video
Hello Tim, I have that exact unit in my shop too plus a Sencore unit there are times I like one or other !!. Sincerely...radiorich — 11:07 PM

[-]
Who's Online
There are currently 6789 online users. [Complete List]
» 3 Member(s) | 6786 Guest(s)
AvatarAvatarAvatar

>