All Done

 

Labels

 Added labels for vibrator and electrolytic capacitor. Also new schematic on the new cover.

12 Volt Replacement for the 6C4

 All tubes but one can be swapped out for 12 volt filament equivalents except for the 6C4. In an effort to make it relatively easy to switch this radio back to 6 volt if needed I decided to make a tube adapter to use a 12AU7 to replace the 6C4. Since the 12AU7 is a dual triode one half is not connected.

Painted Dial

 Painted the dial white:

Vibrator Fun

 Although the radio came with a solid state vibrator it was 6 volt and positive ground, not usable in this case since this radio is being modified to operate on 12 volt negative ground. So I found in my stash a similar sized vibrator with the correct pin configuration and stuffed it with Aurora Design VBN-1 solid state vibrator.

Speaker

 There are these options when dealing with a vintage speaker:

1. Speaker OK to continue on
2. Speaker needs some work (repair cone...)
3. Speaker needs a re-cone
    a. Re-cone speaker
    b. Replace speaker

The speaker in this radio fell between #2 and #3. It has a warped cone causing the voice coil to rub on the armature. I decided, because this speaker is a fairly common size of 6" x 9" to go ahead and replace it. I found an NOS Radio shack speaker on Ebay that had one little tear in the cone that was easily repaired.

Checking new speaker fitment

Filter Capacitor Recan

 

Bottom chassis mounting

Top mounting

Filter capacitor can removed from chassis

Grinding the bottom crimp away

Crimp removed

Mounting ring removed

Terminal plate removed

Everything cleaned up and ready for assembly

Assembly fitting

New modern capacitors selected

New capacitor wired up to terminal plate

Testing the wired assembly

Completed and assembled filter capacitor

Testing completed filter capacitor