If you compare the photos of the Clinton and the Silver, the knobs are the same (except the Silver looks like it has a different one at the far right). My guess is yours had the same round knobs and someone swapped them at some point.
By the way, here's yet another re-badge of your radio, this one sold as a Phillips
https://s-media-cache-ak0.pinimg.com/236...f760a5.jpg
I decided it's time to post something new.
Here's a follow up on the mods to the not so desirable circuit design of this Peerless/Clinton 139. First is the original detector design. [
attachment=23822] So because there is no AVC the volume goes all over the place. I am thinking can I add AVC to this circuit without too much grief.
Now here' are the mods. The the detector, the ballast resistor, and the filter cap.
The detector circuit is from a Philco 40-140 with AVC. I cheated and used germanium diodes and reused the 76 tube as a just audio preamp. So the AVC works fair. I attached to where the ground was for the first antenna coil is. It only varies the first RF stage gain. I also added a filter cap to the bias voltage for the 76 tube.
I know I used too big a filter cap at the rectifier. So I am thinking I will add series resistor with the large cap. This should lower the peak rectifier current and still keep the ripple hum down.
And last is the ballast resistor. I replaced it with an 8uf motor run cap. It took a few tries to find just the right value. I measured the filiment voltage of the 25Z5 tube for this. It takes a little longer to warm up but it works with no resistor heat.
I made these mods some time ago. And still need to add the series resistor to the rectifier cap. I will try and post the results.
I doubt that resistor was original. I think it was someone's mod to replace the CB cord.
8 uF sounds about right. This is what I used in AA5s with CB cords.
You could if wanted SS the 25Z5 by using an old base and adding 3 diodes. One across the heater pins and the other two the plate to cathode. No heat and more B+++++++. I've used it in a few sets but not w/a cap dropper
GL w/your project!
Today I changed the first filter cap from 450uf to 33uf this should lower the peak rectifier current. Then redrew the power supply so it made sense.
I also drew in the ground at the 6A7 cathode where it use to have the volume control attached to it.
I also decided that it had too much audio gain after changing the 76 tube from detector to audio amp. and added some resistors to the volume control. I know I could have added a resistor the the 76 cathode and may try this instead.
After looking closer at the power supply I moved the power switch to hot side of the cord with a 2 amp fuse and made sure the neutral side went to the chassis part of the bias circuit.
(it's a polarized plug) Now I only have 10vac from the chassis to earth ground.[
attachment=23835]
this thread will come in very handy, as we have one too! But it's a 'GENERAL'
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attachment=23836]