Posts: 15,835
Threads: 554
Joined: Oct 2011
City: Jackson, NJ
I was about to give up. It was receving across dial after all. But yesterday scoping outthe distortion I thought was coming out of the detector, I realised whatever was there did not explain the output waveform from 43. I even changed the grid bias resistors that are supposed to be 300k and were 500k. I saw a sawtooth after the DC blocking cap from 75 to 43. So I noticed the two caps, the DC blocking and the shunt looked the same and the shunt was supposed to be 500pF and both caps were 4.7nF.
So I changed it, and....voila.... It plays really nice and really loud. The freaking shunt was killing everything.
The guy who recapped this radio made at least 3 screwups that made the radio not working properly.
About it.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
Posts: 7,288
Threads: 268
Joined: Dec 2009
City: Roslyn Pa
Stoopid NF capacitors!!!!!
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
Posts: 15,835
Threads: 554
Joined: Oct 2011
City: Jackson, NJ
Plus the grid cap on the 75 had bad connection and had to be resoldered, sometimes it would go to garbled sound and react to tapping, after soldering it's ok. So in case it starts doing it again, change the 75 tube.
Ok. Done. Officially.
PS. Dude, stop buying these.... handicapped radios. They are totally botched and are actually challenging even for those of us who actually know the difference between the caps you charge and the caps you wear  Buying a non-working unit someone else tried to fix and failed is buying the result of their ineptitude, which is problem upon problem upon proble. The grid dap was the only problem the guy did not cause himself. All three problems I fixed he introduced. The radio was working before he decded to recap.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
(This post was last modified: 09-06-2017, 07:50 PM by morzh.)
Posts: 2,572
Threads: 337
Joined: Jun 2013
City: lawrenceville nj
Come on mike that's the fun of it getting it to work 
Some day, and that day may never come, I will call upon you to do a service for me. But until that day, accept this justice as a gift
mafiamen2
Posts: 15,835
Threads: 554
Joined: Oct 2011
City: Jackson, NJ
No, it's no fun. Fun is fxing an old radio, but fixing others mistakes, especially when they're many, ain't no fun.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
Posts: 4,707
Threads: 51
Joined: Sep 2008
City: Sandwick, BC, CA
Mike;
I ran into that in a post war Philco I bought off of another collector at his garage sale. One of the mica caps must have been bad, so he replaced it, was originally a 100 mmf/pf cap and he put a .01 in it's place. He also hog tied a 50 year old axial lead 450 volt cap to the back of the speaker's rear bracket because he didn't have room for it under the chassis, thankfully he did not recap the rest of the set. The odd part was that he used to be a com tech in the air force, so he must have done these things, the set didn't work, so he gave up on it. So as you say, dealing with other people's problems, I didn't mind so much though since I got it pretty cheap.
Regards
Arran
(This post was last modified: 09-07-2017, 01:17 AM by Arran.)
Posts: 15,835
Threads: 554
Joined: Oct 2011
City: Jackson, NJ
Arran
Heck, yeah, if I get some very sought after radio for a song, unless it is totally hosed, it might be worth it.
Problem is, when the radio goes bad on its own, you just replace the bad parts.
When someone rearranged it in some creative way, you have to figure out wrong connections.
Well, it is working now, that's what mattress 
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
Posts: 4,109
Threads: 310
Joined: Nov 2013
City: Kings Park NY
I'm glad It was not me...
Good job,
Unfortunately I'm selling it.. I would have enjoyed it for the last 2 years but you had the chassis
Right now it is 1937 Philco's..
Times I have been electrocuted in 2021
As of 1/01/2021
AC: 4 DC: 1
Last year: 6
Posts: 15,835
Threads: 554
Joined: Oct 2011
City: Jackson, NJ
I did not have it for two years. Maybe for a year.
Philco will have to wait.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
Posts: 4,109
Threads: 310
Joined: Nov 2013
City: Kings Park NY
I was kidding Michael 
I'm in no rush for the Philco 610.
I meant I have to concentrate on buying Philco's for my display...
Times I have been electrocuted in 2021
As of 1/01/2021
AC: 4 DC: 1
Last year: 6
Posts: 15,835
Threads: 554
Joined: Oct 2011
City: Jackson, NJ
Please buy good Philcos
Preferably without RF mezzanines and sub-boards underneaths. And without rubber-coated wires. And not "dealt with before".
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
Users browsing this thread: 2 Guest(s)
|
|
Recent Posts
|
|
New Philco Repair Bench
|
| I am sure this is the archive, and not the Chuck's site.morzh — 09:50 PM |
|
Made mistake & did not label connection
|
| It's not like we are good friends with that wire and can tell it from other ptetty identical looking wires.
Why'n't you...morzh — 09:49 PM |
|
Made mistake & did not label connection
|
| I'm not sure why that wire wasn't covered in the video. I'm pretty sure the 6A8 won't work until that pin is grounded. Y...RodB — 09:47 PM |
|
Made mistake & did not label connection
|
| You'll have to forgive me, I am not sure what you mean. Can you explain what you are really saying. If anyone does not...georgetownjohn — 08:05 PM |
|
Made mistake & did not label connection
|
| Those are details better left to the ones who know. Maybe you disconnected the wrong end of the wire.RodB — 06:22 PM |
|
Made mistake & did not label connection
|
| Maybe this is starting to make some sense in my hard head. Is this why the wire in question was not in the great Ron Ra...georgetownjohn — 04:34 PM |
|
Made mistake & did not label connection
|
| I was correct with the 6A8 pin connection's, 7 and 8 are connected to ground as well as the tube shield (the broken line...RodB — 02:41 PM |
|
Made mistake & did not label connection
|
| What does the dotted line representing that surrounds the tube in the schematic?georgetownjohn — 02:17 PM |
|
Made mistake & did not label connection
|
| Hello John,
I have been there either label got lost or was not labeled !
Sincerely Richardradiorich — 02:15 PM |
|
Made mistake & did not label connection
|
| Sorry, it is a Philco 37-640. Does that help?--Johngeorgetownjohn — 02:14 PM |
|
Who's Online
|
There are currently 6643 online users. [Complete List]
» 1 Member(s) | 6642 Guest(s)
|
|
|
|
 
|
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
