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Post by digs57 on Aug 10, 2019 12:31:02 GMT -7
After watching latest ama video I did put new recti in maz 18 verb and am getting some ringing?
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Post by Chilly Gibbons (Todd T.) on Aug 10, 2019 12:40:54 GMT -7
I think the volumes up test is looking for microphonics in the preamp stages, although it may also cover the power tubes. Did you do tap the preamp tubes?
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Post by digs57 on Aug 10, 2019 12:53:15 GMT -7
Its not doing it now...but that it did it all...ill give that a shot...I did put a nos tube v1 and that could be the ?
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Post by Chilly Gibbons (Todd T.) on Aug 10, 2019 13:57:36 GMT -7
Possible. I’ll quote my favorite amp builder: When it comes to NOS tubes, “we’re down to seeds and stems”. Outside of rectifiers, NOS has pretty much been picked clean of the absolute best.
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Post by digs57 on Aug 10, 2019 15:34:06 GMT -7
Possible. I’ll quote my favorite amp builder: When it comes to NOS tubes, “we’re down to seeds and stems”. Outside of rectifiers, NOS has pretty much been picked clean of the absolute best. Would concur with that...wise proverb...
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Post by daddyelmis (Greg) on Aug 10, 2019 16:34:31 GMT -7
Does anyone know what the vacuum tube market is in total dollars? I’m wondering why so few makers now … must just be very cost prohibitive to manufacture 80 year old technology at a market price and make a profit.
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Post by KeithA on Aug 10, 2019 17:09:50 GMT -7
Does anyone know what the vacuum tube market is in total dollars? I’m wondering why so few makers now … must just be very cost prohibitive to manufacture 80 year old technology at a market price and make a profit. Not sure about that, but it's not in their interest to make a price-conscious tube that will last a long time. They need them to fail...regularly to maintain sales.
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Post by digs57 on Aug 10, 2019 19:23:53 GMT -7
Its a sticky mine field and im only going in so far...right now at the docs rec a "mullard 5ar4" and a GE jan/nos12ax7wa v1 with alnico speaker is got something going on that I like...alot
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