01-05-2019, 10:03 PM
Restuffing a Twist-Lok Electrolytic Can
Removal involved not only unsoldering and removing several wires and components, but also unsoldering two of the four mounting tabs from the chassis.
Then the can had to be (carefully) cut open at the bottom end so that the insides could all be pulled out.
Once that was done, I installed four new United Chemicon electrolytics which are not only skinny so they fit well, but also have a decent ripple current rating (440 mA). Rated at 105 degrees C and a maximum life of 12,000 hours.
Here's how things looked with the new electrolytics in place and ready for re-installation in the can:
[Image: http://philcoradio.com/images/phorum/FM5...0B_003.jpg]
Once everything was back in the can, I carefully rolled the lip back over the outer insulator to hold everything in place.
[Image: http://philcoradio.com/images/phorum/FM5...0B_004.jpg]
Finally, the can was reinstalled on the chassis and everything hooked back up.
[Image: http://philcoradio.com/images/phorum/FM5...0B_005.jpg]
The added 100 ohm resistor is in series with the output of the new silicon rectifiers connected as a bridge, to take care of the higher voltage from using silicon in place of selenium.
Next jobs: To carefully clean the dial, add a pair of dial lamp contacts for the left side of the dial (which are currently missing), restring the dial cord, add a pointer, add a set of tubes and try it out.
Removal involved not only unsoldering and removing several wires and components, but also unsoldering two of the four mounting tabs from the chassis.
Then the can had to be (carefully) cut open at the bottom end so that the insides could all be pulled out.
Once that was done, I installed four new United Chemicon electrolytics which are not only skinny so they fit well, but also have a decent ripple current rating (440 mA). Rated at 105 degrees C and a maximum life of 12,000 hours.
Here's how things looked with the new electrolytics in place and ready for re-installation in the can:
[Image: http://philcoradio.com/images/phorum/FM5...0B_003.jpg]
Once everything was back in the can, I carefully rolled the lip back over the outer insulator to hold everything in place.
[Image: http://philcoradio.com/images/phorum/FM5...0B_004.jpg]
Finally, the can was reinstalled on the chassis and everything hooked back up.
[Image: http://philcoradio.com/images/phorum/FM5...0B_005.jpg]
The added 100 ohm resistor is in series with the output of the new silicon rectifiers connected as a bridge, to take care of the higher voltage from using silicon in place of selenium.
Next jobs: To carefully clean the dial, add a pair of dial lamp contacts for the left side of the dial (which are currently missing), restring the dial cord, add a pointer, add a set of tubes and try it out.
--
Ron Ramirez
Ferdinand IN
