Restoration Commences on 1947 RCA Victor 721TCS

[dtvmcdonald]

I have always been of the impression that electrolytics that are bone dry
cannot out damn bug! OUT! you damn cockroach get out of my keyboard reform.
Reforming is supposed to take solvent.

I have seen caps that were bone dry and had normal capacitance and
took rated voltage, but I assumed that they were that way before going dry.
What think you people.

I hope you fry, damn bug ... wait, no, that might hurt the keyboard. OUT!
Damn coronavirus, keeping the exterminators away!

[init4fun]

Originally Posted by dtvmcdonald

I have always been of the impression that electrolytics that are bone dry
cannot out damn bug! OUT! you damn cockroach get out of my keyboard reform.
Reforming is supposed to take solvent.

I have seen caps that were bone dry and had normal capacitance and
took rated voltage, but I assumed that they were that way before going dry.
What think you people.

I hope you fry, damn bug ... wait, no, that might hurt the keyboard. OUT!
Damn coronavirus, keeping the exterminators away!

Not fair to be drinking and not share with your old TV buddies .....

[Electronic M]

Originally Posted by init4fun

Not fair to be drinking and not share with your old TV buddies .....

Yeah!

[old_coot88]

https://www.youtube.com/results?sear...ry=i+like+beer

[Penthode]

I ran the 721TS another 5 hours today. Ran three movies and film shorts from a TCM DVD.

Electrolytics still fine. Each running cool. Rest of the wax capacitors I chose to reprieve okay. Yesterday when I tested the resistors in the video amplifier, all were within tolerance.

When I obtained this set the width adjustment was set for maximum width. As is, the image on the 10BP4 just fills the mask. Might look around the sweep section to investigate. Certainly the width and height have remained constant over the period of my bench test.

Consider this set sat in a partially insulated attic for over 50 years and the sat in storage for a further seven. I am fortunate it had a quiet existence which may partially explain why much of the original componentry has survived.

Will keep it running to determine if anything will fail. I suppose 35 hours is insufficient to prove that original electrolytics aren't salvageable. So let's give it another 35 hours. I am curious to see myself.

Here are another couple of screenshots from a few minutes ago.