Hello All,
I have the chassis from one of these that I electronically restored. Now I notice that I cannot get the wiper in the phono volume control to connect to either end of the control. In other words, I cannot get zero ohms in one direction or maximum in the other direction. What is the value of the phono volume control supposed to be? 1 meg ohm?

Thanks,

Dave

Hello Again All,
Since nobody knows, I just happen to have a couple more of those chassis, and it is a 1 Meg ohm control. Also, these two chassis had bad first I. F. transformers, which can be replaced with some standard late 1950s early 1960s I.F. transformers, if there is such a thing. The replacement has no Maker's name and neither does the one I took out. However the primary and secondary both measure about 15 ohms.
Before replacing the I. F. transformer as the radio was tuned all it was do was motorboat or make funny noises.
Right after replacing the I. F. transformer, the radio worked perfectly. The one that doesn't work still measures 15 ohms on both primary and secondary. So I have no idea why it wouldn't work.
If anyone is interested, I can tell you the numbers and dimensions of the old and new IF transformers. They are held in with a clip at the bottom. So the replacement is just about identical to the original, except for the number printed on it.

Dave
:Hello All,
: I have the chassis from one of these that I electronically restored. Now I notice that I cannot get the wiper in the phono volume control to connect to either end of the control. In other words, I cannot get zero ohms in one direction or maximum in the other direction. What is the value of the phono volume control supposed to be? 1 meg ohm?
:
:Thanks,
:
:Dave
:

I'm not familiar with that brand, but some time in the 50's radio manufacturers seemed to migrate away from IF transformers that were tuned with integral compression capacitors to transformers with fixed caps, with resonance tuning accomplished by screwing sintered-iron core slugs up and down. If your set is the latter type, my guess is that you have a failed fixed capacitor in the IF can. Another way an IF cap can fail without losing coil continuity is for an internal connection to short to the can, due to poor build workmanship.