New Project: 1934 Colonial 662 (corrected model)
Posts: 1,287
Threads: 44
Joined: Nov 2017
City: Menlo Park
State, Province, Country: CA
Lots of work on this set this weekend. First off, to diagnose the oscillator problem. I replaced all the paper caps, and the suspect 50k resistor, and the paper caps. Still no stations, and now there was an LF instability in the whole set as soon as the tuning cap was more than half open, with the set blowing raspberries from the speaker. At the end of the day, I returned to checking wiring and component values from the schematic, and found a broken wire from the converter tube grid circuit to the oscillator section of the tuning cap. OK, something to go on, and a good end to the day.
Today I removed the tuning cap, which was needed anyway, to replace the rubber bushings. I punched these out of some silicone foam, and added new wires to the cap #28 enameled wire, with cloth insulation slipped over it was a close match to the original. With this, I finally had some reception, but still a very unstable receiver. Whistles on stations up to about 100 on the dial, after that raspberries from the speaker, on either band. Eventually I tracked this to a bad solder joint connecting one of my restuffed caps. With that restored, I was able to align the radio and it really pulls in stations. 
Pics tomorrow,
Ed
I don't hold with furniture that talks.
Posts: 1,287
Threads: 44
Joined: Nov 2017
City: Menlo Park
State, Province, Country: CA
A few pics
Fine wires leading to the tuning capacitor stators. Notice the osc section on the left has a broken connection. These had so little spare that the breakage was probably due to the additional movement due to the perished rubber mounting grommets:
New grommets cur from silicone foam rubber:
Tuning cap with new wiring, ready for reinstallation.
Playing some music
I don't hold with furniture that talks.
Posts: 1,032
Threads: 9
Joined: Jul 2020
City: Greenlawn
State, Province, Country: NY
Nice and clean! Looks GR8!!
"Do Justly, love Mercy and walk humbly with your God"- Micah 6:8
Best Regards,
MrFixr55
Posts: 1,287
Threads: 44
Joined: Nov 2017
City: Menlo Park
State, Province, Country: CA
This weekend. I found time to restuff the two electrolytic cans. All is still working nicely. The chassis is waiting for a new line cord, still to be delivered, and will get new antenna and earth leads before returning to the cabinet.
Ed
I don't hold with furniture that talks.
Posts: 5,084
Threads: 270
Joined: Nov 2012
City: Wilsonville
State, Province, Country: OR
Looking great!
Posts: 1,287
Threads: 44
Joined: Nov 2017
City: Menlo Park
State, Province, Country: CA
Another one over the finish line. I'm pleased with it and particularly enjoyed working on this radio for some reason I cannot quire explain.
I don't hold with furniture that talks.
Posts: 15,811
Threads: 553
Joined: Oct 2011
City: Jackson, NJ
Cute set.
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: 1,597
Threads: 100
Joined: May 2008
City: Omak
State, Province, Country: WA
Hello Ed,
Nice little set !
Sincerely Richard
Posts: 1,191
Threads: 25
Joined: Jan 2014
City: Wellborn Florida
Great job! Ed
Posts: 1,287
Threads: 44
Joined: Nov 2017
City: Menlo Park
State, Province, Country: CA
Thanks everyone. I appreciate the kind words.
I don't hold with furniture that talks.
Posts: 4,381
Threads: 412
Joined: Jun 2011
City: Boston
State, Province, Country: Massachusetts
She is a beaut. Nice size, maybe I could sneak one that in unoticed!
I think Colonial made a lot of stuff for SEARS if its the same Colonial I am familiar with.
Enjoy.
Paul B
Tubetalk1
Posts: 1,597
Threads: 100
Joined: May 2008
City: Omak
State, Province, Country: WA
Hello Paul,
Yes it is the same company and I own a bunch of sears radios made by them also Arvin .
Sincerely Richard
Posts: 4,381
Threads: 412
Joined: Jun 2011
City: Boston
State, Province, Country: Massachusetts
I like that mantle style, thanks for confirming Rich.
Paul
Users browsing this thread: 2 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 no members online. |
|
 
|
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
