Wednesday, January 4, 2017

Chassis Tear Down

 Radio #9 ready for tear down

Tubes, vibrator and filter cap already removed
 First up is to remove the power lead

 Solder-Wick it and then pull it out

 Then a couple of caps soldered to a lug on the chassis

 Tuning mechanism to chassis ground strap

 Solder-Wick and disconnect strap

 Cut the tone control leads

 Unclip the dial lights

 Remove the control mounting nuts

 Solder-Wick and remove antenna coil connection

 Cut third tone control lead

 Remove tuning mechanism mounting screw

 Remove tuning mechanism

 Remove tone control

 Remove tuning mechanism rear plate mounting nuts

Remove rear plate
Solder-Wick and remove the tuning slugs
Label tuning slug locations (A, B, & C)
 Removing dial pointer

 Removing mechanism bumpers

 Removing push buttons

 Removing bumpers

 Tuning mechanism ready for ultrasonic cleaning

 Removing chassis from case

 Removing antenna input connector

 Grinding down rivet that holds the antenna input pad

 Automatic punch works great to p[op out the ritets

 Case ready for paint strip, media blast and painting

 Remove the dial

 Tuning mechanism ultrasonically cleaned

Tuesday, January 3, 2017

Filter Capacitor Recan

Electrolytic capacitors have a useful life span and ones that are in a 60+ year old radio are way past that life span so they need to be replaced. The problem is that manufacturers don't make them in the old twist-lock package so my solution is to repackage new modern capacitors in the same can.

 Electrolytic filter capacitor ready for removal

 Filter capacitor removed

Crimped edge ground down

 Peeling the crimp away

 Removal of the twist-lok mounting ring

Removal of the terminal board
 Removal of the sealing board and the guts

 Can, sealing board, terminal board, terminals, and mounting ring cleaned up

 Verifying component fit

All can ready for assembly

Connecting together the four filter capacitors

Add sealing plate

Add terminal board

Sealing board, terminal board, and mounting ring installed and epoxied

Leads wraped and soldered

All units complete with label