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

Philco 86 Voltages
#2

Hi Tiddat,

Welcome to te Phorum!

The 80 is likely OK. The voltages are high due to a low current draw. These power supplies always run higher when there is no "load" connected to it. Therefore, the issue is that there are circuits that are not drawing what they should.

http://www.nostalgiaair.org/PagesByModel...029653.pdf

According to the above schematic, there should be about 160V on the plates of the 71A Output tubes. If that value is high, the 71As may be bad, and may be the reason for the low volume. I fixed a Gloritone several years ago for a friend with the same symptoms. Audio output was a single '45 tube. When replaced, issue was solved. Radio played loud and proud and B+ voltages returned to normal.

This radio needs a rather long antenna. This is a "TRF" set, very similar to Atwater Kent and RCA TRF sets of the period, except that this et has a Push Pull output which gives superior, lower distortion sound. Unfortunately, the grid leak detector used in this set gives higher distortion than a diode detector. This set may also employ the "Neutrodyne" circuit, and unlike the Radiola 16, 17, 18 and the A-K 5, 40, 35c, the first RF stage is tuned.

This set does have a built in "local" antenna (Capacitive coupling to AC Line. However, ensure that the capacitor 33 is new and of a "Safety" type.

"Do Justly, love Mercy and walk humbly with your God"- Micah 6:8
Best Regards, 

MrFixr55


Messages In This Thread
Philco 86 Voltages - by Tiddat33 - 02-06-2023, 12:13 AM
RE: Philco 86 Voltages - by MrFixr55 - 02-06-2023, 08:52 AM
RE: Philco 86 Voltages - by Tiddat33 - 02-06-2023, 10:44 PM
RE: Philco 86 Voltages - by MrFixr55 - 02-06-2023, 10:58 PM
RE: Philco 86 Voltages - by RodB - 02-07-2023, 10:32 AM
RE: Philco 86 Voltages - by Ron Ramirez - 02-07-2023, 01:53 PM
RE: Philco 86 Voltages - by RodB - 02-07-2023, 02:46 PM
RE: Philco 86 Voltages - by Tiddat33 - 02-07-2023, 09:07 PM
RE: Philco 86 Voltages - by Radioroslyn - 02-08-2023, 01:15 PM
RE: Philco 86 Voltages - by MrFixr55 - 02-08-2023, 03:51 PM
RE: Philco 86 Voltages - by Ron Ramirez - 02-08-2023, 03:56 PM
RE: Philco 86 Voltages - by RodB - 02-08-2023, 04:06 PM
RE: Philco 86 Voltages - by Arran - 02-08-2023, 04:08 PM
RE: Philco 86 Voltages - by Tiddat33 - 02-08-2023, 09:58 PM
RE: Philco 86 Voltages - by Radioroslyn - 02-08-2023, 10:52 PM
RE: Philco 86 Voltages - by radiorich - 02-09-2023, 09:31 AM
RE: Philco 86 Voltages - by Tiddat33 - 02-12-2023, 06:50 PM
RE: Philco 86 Voltages - by RodB - 02-13-2023, 10:37 AM
RE: Philco 86 Voltages - by Tiddat33 - 02-13-2023, 05:10 PM
RE: Philco 86 Voltages - by Ron Ramirez - 02-13-2023, 08:42 PM
RE: Philco 86 Voltages - by RodB - 02-13-2023, 09:03 PM
RE: Philco 86 Voltages - by Ron Ramirez - 02-14-2023, 09:19 AM
RE: Philco 86 Voltages - by Arran - 02-14-2023, 02:20 PM
RE: Philco 86 Voltages - by Ron Ramirez - 02-14-2023, 02:29 PM
RE: Philco 86 Voltages - by RodB - 02-14-2023, 02:29 PM



Users browsing this thread: 4 Guest(s)
[-]
Recent Posts
Shadow Meter Bulb
Phorum members, I am trying to find the bulb # for PHILCO Shadow Meter part number 45-2180 that is from a 37-640 chassis...georgetownjohn — 06:53 PM
Philco 41-608 changer coupler
3D-printing...short of machining, of course. Or molding.morzh — 05:20 PM
Philco 41-608 changer coupler
Thanks, Morzh. That solves the issue of the rubber pieces. Now, I need to find a way to replicate the pot metal piec...alangard — 05:07 PM
12' Philco
If it is 12', either Kareem or Andre would have to jump pretty high to look at the front panel. Kareem would have an e...morzh — 01:48 PM
12' Philco
And here's a story about the tires on the truck. Same "no-stoop" guy must have installed these! Take care a...GarySP — 01:17 PM
Hickok AC51 tube tester
I think they have only shown the secondaries of the transformer. Two of them feed the rectifiers' filaments.morzh — 12:58 PM
IF can wire size and Rubber mounts?
Arran If the wire inside cans is the gauges you mentioned, the sole reason for that would be mechanical, to stiffen t...morzh — 12:56 PM
12' Philco
Rod, Yes, I know, but the Giant Philco is not around anymore either, so I go by whoever was alive fairly recently. H...morzh — 12:54 PM
Hickok AC51 tube tester
Absolutely no one is going to reverse engineer that circuit. Even the iron core is missing.RodB — 10:37 AM
IF can wire size and Rubber mounts?
Thanks to both members for your help regarding wire and tuner mtg supports. regards--Johngeorgetownjohn — 09:33 AM

[-]
Who's Online
There are currently 6064 online users. [Complete List]
» 1 Member(s) | 6063 Guest(s)
Avatar

>