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Old 03-07-2026, 05:27 PM
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bandersen bandersen is offline
RCA 741PCS
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 8,775
I just got this cool military grade HV cap from Surplus Sales of Nebraska. It's made from reconstituted mica.


It's also just a tad too big to fit cleanly.
I'll put some of the blame on them. They listed it as 1.75" wide, but it's actually 1.85" wide.
The length is exactly 2.25" as specified.
If I angle it and shave off a bit of the outer coating I think I can cram it in.
More of a concern are the leads.
The common does not connect to the case. It needs to wrap around down to the center lug on the opposite side.
I think I can just manage it.
This project sure is frustrating. So far just about every part has been oh so close, but not quite right.


The power supply in this set is rather creative. Here's a simplified, partial diagram.
My favorite is how they vary the focus voltage by using a big rheostat on the primary on the focus HV transformer.
I suppose they wanted to avoid having to deal with a high voltage on a user accessible potentiometer.

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Last edited by bandersen; 03-07-2026 at 05:44 PM.
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