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Diabolical Artificer · 3rd Jun 2018, 6:37 am

Schematic here - https://vintage-radio.net/forum/showthread.php?t=60414 it's hard to see the voltage figures but a lot of Advance sig gens have about 300/310v HT before the first dropper resistor ie R26. V4 is a EZ81, looking at the datasheet for a HT of 295v that would mean you need about 300v AC for the tfmr secs, so 300 0 300v,

Andy.

3rd Jun 2018, 6:37 am	#2
Diabolical Artificer Dekatron Join Date: Jul 2009 Location: Sleaford, Lincs. UK. Posts: 7,670	Re: Advance J2 Audio Generator Schematic here - https://vintage-radio.net/forum/showthread.php?t=60414 it's hard to see the voltage figures but a lot of Advance sig gens have about 300/310v HT before the first dropper resistor ie R26. V4 is a EZ81, looking at the datasheet for a HT of 295v that would mean you need about 300v AC for the tfmr secs, so 300 0 300v, Andy. __________________ Curiosity hasn't killed this cat...so far.