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Old 17th Jun 2020, 2:21 pm   #27
David Simpson
Nonode
 
Join Date: Mar 2008
Location: Aberdeen, UK.
Posts: 2,859
Default Re: Yes, yet another home made valve tester.

Adrian, it might be worth your while, and avoid duplication of replies - to ask the Moderators to join your other current thread in "General Vintage Technology" to this one. And, less confusing for us lot out here.
Just wondering - have you tried testing the 6AU5 DC Standardised Valve I sent you last week? Being just a bog standard IO valve base, it should be easy enough to set up in your prototype rig. Hopefully you should get ball-park-ish results near to 40mA & 4mA/V at roughly -20V Vg.
As Retailer says - that a hewer of amount of ferrite beads you've used. One, or maybe 2 per lead is all you need.

Regards, David
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