Restoring a 1963 Admiral ctc-12 clone

[kramden66]

went through the capacitors in the vert horz board , they were all checking good , I almost gave up but then found a .47 with minor leakage that goes to the vertical hold control that changed my mind and the other which had a good amount of leakage was .1 in the agc section, I did find it interesting that on some when I de-soldered one leg of the cap to test it the end still connected would move a little on the board , I even found this to be true of a resistor that I never heated the pins , is it just because the solder joints are old or is it just because some weren't strong from the factory ? any ideas ?

[hi_volt]

Originally Posted by kramden66

went through the capacitors in the vert horz board , they were all checking good , I almost gave up but then found a .47 with minor leakage that goes to the vertical hold control that changed my mind and the other which had a good amount of leakage was .1 in the agc section, I did find it interesting that on some when I de-soldered one leg of the cap to test it the end still connected would move a little on the board , I even found this to be true of a resistor that I never heated the pins , is it just because the solder joints are old or is it just because some weren't strong from the factory ? any ideas ?

On the old RCA chassis, it's not uncommon to get fractured solder joints. I ran into this on a Silvertone combo set I worked on a couple of months ago, which had a couple of bad connections on some jumper wires that I needed to re-solder. Fractured solder joints can be caused by either repetitive mechanical stress or by thermal cycling (typically thermal cycling in an old TV set). Bad solder joints are also common where the PC boards solder to the chassis to pick up ground. Be sure to check these as well.