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

New Project: 1934 Colonial 662 (corrected model)
#16

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. Icon_smile

Pics tomorrow,

Ed

I don't hold with furniture that talks.
#17

A few pics Icon_smile

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.
#18

Nice and clean! Looks GR8!!

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

MrFixr55
#19

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.
#20

Looking great!
Icon_clap
#21

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.
#22

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.
#23

Hello Ed,
Nice little set !

Sincerely Richard
#24

Great job! Ed Icon_clap
#25

Thanks everyone. I appreciate the kind words.

I don't hold with furniture that talks.
#26

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
#27

Hello Paul,
Yes it is the same company and I own a bunch of sears radios made by them also Arvin .

Sincerely Richard
#28

I like that mantle style, thanks for confirming Rich.

Paul




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
New Philco Repair Bench
Morzh is correct. The repair bench on our website is an archived image of chuck’s original site. He no longer provides s...klondike98 — 05:32 PM
Made mistake & did not label connection
Excellent information. It is all starting to come together now and your explanation really helped since I noticed that ...georgetownjohn — 04:39 PM
Made mistake & did not label connection
Hi John, I don't have this radio, but I can supply some info: Based on your pic, pins 7,8 and 1 are used together, go...MrFixr55 — 02:02 PM
New Philco Repair Bench
As far as I know, the Repairbench does not work, and has not been working in a while. Chuck (we had that campaign looki...morzh — 01:33 PM
Radio city products 664 schematic request
Need a schematic or manual for the 664. The 663 may be similar.daveone23 — 12:38 PM
New Philco Repair Bench
Thanks Gary.dconant — 12:16 PM
New Philco Repair Bench
I tried accessing the site through our library and got the same response. It's reported to our tech gurus. GaryGarySP — 11:50 AM
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

[-]
Who's Online
There are currently 3840 online users. [Complete List]
» 3 Member(s) | 3837 Guest(s)
AvatarAvatarAvatar

>