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Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders. |
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3rd Sep 2018, 5:55 pm | #1 |
Nonode
Join Date: Mar 2008
Location: Aberdeen, UK.
Posts: 2,852
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IO Anti-Parasitic Adaptor for VCM's
A chum just recently needed an anti-parasitic adaptor for his CT160. For EL34's & such. An IO NOS Valve Holder, an IO Valvebase from a duff valve, and another old valvebase from a duff B9 valve. Ferrite beads sourced from eBay. The B9 base was cut to make a skirt to hold the IO items, and araldited together. Internal leads & beads heat-shrink sleeved. All connections meggered at 1000V. Worked fine on my Mk3, with one of his EL34's drawing nigh-on 90mA. (His other 3 EL34's were also graphed & produced "matched pair" results on the whole slope up to 80mA ).
Regards, David |
4th Sep 2018, 6:44 am | #2 |
Dekatron
Join Date: Jul 2009
Location: Sleaford, Lincs. UK.
Posts: 7,658
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Re: IO Anti-Parasitic Adaptor for VCM's
Nice job David.
Andy.
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