1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration

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

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

Linear Mode
36-650 restoration
Bill Bacco
Member
***
Posts: 94
Threads: 9
Joined: Feb 2013
City: Monroeville, PA
#4

02-13-2024, 01:38 PM
I noticed that the voltages on the Plates of most of the tubes are any where from 50 to 100V higher than the schematic lists.
I also noticed that the Shadow meter is pegged to one side and that there is about 40V across it.

The voltage out of choke (part #79) after the Rectifier (80) is at 303V.

All of the paper and electrolytic caps have been replaced.
Does anyone know if the schematic (attached) is correct?

It could be a resistor issue, there are a couple that seem to be quite a bit out of tolerance.

Any other thoughts are appreciated.

Thanks, Bill


Attached Files
.pdf Philco Service Bulletin 220.pdf Size: 2.65 MB  Downloads: 93
(This post was last modified: 02-13-2024, 01:39 PM by Bill Bacco.)
Find
« Next Oldest | Next Newest »


Messages In This Thread
36-650 restoration - by Bill Bacco - 02-12-2024, 02:12 PM
RE: 36-650 restoration - by klondike98 - 02-14-2024, 06:17 PM
RE: 36-650 Alignment - by RodB - 02-13-2024, 10:59 AM
RE: 36-650 Alignment - by Bill Bacco - 02-13-2024, 01:25 PM
36-650 High Plate Voltages - by Bill Bacco - 02-13-2024, 01:38 PM
RE: 36-650 High Plate Voltages - by morzh - 02-13-2024, 04:19 PM
RE: 36-650 High Plate Voltages - by Bill Bacco - 02-13-2024, 04:48 PM
RE: 36-650 Alignment - by morzh - 02-13-2024, 04:24 PM



Users browsing this thread:
[-]
Recent Posts
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
RCA 15X
Everthing goes at once, maybe it's the cold weather, I have had 2 dial strings break and no my little RCA is having dial...Paul Philco322 — 10:26 PM
Philco 91 Schematic
Hi Dan, I can't explain this specific resistor but I have seen the use of a switch to apply B+ voltage to screen gri...RodB — 09:36 PM
6TPZ and 5TPO Radio Help
I suspect it's been repaired before. And I suspect whoever repaired it, wanted to re-use old transistors' pin stubs in o...morzh — 09:24 PM
B&K 1077B no video
Thanks Rich! I'll take a look and see what he has. I know there's more modern equipment to be had, but this one I know a...TV MAN — 09:11 PM
B&K 1077B no video
Hello Tim, Here is a link to restoration of one on Phil's old radios site ! Sincerely Richard bk1077bradiorich — 09:01 PM
6TPZ and 5TPO Radio Help
I'm a little befuddled on this one. Should X5 and X4 be tied together like this?  It looks like someone added this at so...R3Sons — 07:33 PM

[-]
Who's Online
There are currently no members online.

>
  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration