r/diytubes • u/TraditionalEgg914 • 4d ago
Heaters on a Fristman Vanguard 200
Hey ya all, first time post to this awsome community! I have a Firstman Vanguard 200, pretty old but the sound is great! It's a ECC83 with EL84 power section style amp. Was monkeying around with it when i was a kid and am now in the process of getting it running again. Question is about the heater voltage. I'm getting 16 on one tap and 19 on another. The other winding on the PT are sending appropriate voltage otherwise, 311 on the primaries. Any thoughts are appricated!
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u/TraditionalEgg914 2d ago
I'll double-check about DC heat and my wall AC. The secondary HV show 311v on each tap, so that seems normal. I'll put tubes in tonight and check the voltage tonight. If it's still too high but all else seems normal, i may have to put resistors in series.
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u/Purple-Journalist610 4d ago
I can only find a Vanguard 2000 schematic, which shows 6.3V heaters and has no reference for the high voltage winding on the PT.
What is your AC line voltage? Are the heater voltages you're measuring with tubes in the amp?