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Originally Posted by Electronic M
Is it necessary to replace the seleniums before a power up? And to those whom have installed 1N4007s in place of the seleniums what if any added series resistance value did you use?
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My CTC-4 came with modern silicon rectifiers already in it, I just run it a little low on input voltage and read B+ till it's correct. I toyed with resistors before, but they dissipate a ton of heat.
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And to those who have used newer CRT types than the 21AXP (Nick...) how did you connect the HV button on the CRT to the HV connector on the HV cage?
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The HV tower uses the exact same connection as a Tektronix o-scope, that's where I stole my lead from. I had to desolder the original wire, then soldered on a HV cup with a longer wire that matches the connection on the CRT (the type with a silicone cup). I think I might have given the one I made to Bob or Mark, you can make your own the same way if you get your hands on one of those leads.
Here's an Ebay link, but $70 seems pretty steep for just the wire:
http://www.ebay.com/itm/Tektronix-pn...item43ac0df518
Perhaps you can cannibalize a broken scope?
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Also which tubes are supposed to have shields on them?
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Just the ones that have grounding fingers attached to the chassis.