D.A.(Tony)Stewart
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I'm not quite sure what your point is. I have no doubt that you managed to make a really bad valve amp 50 years ago. That doesn't mean that others can't make really good valve amps (then or now).I made a mid-quality vacuum tube amplifier in 1961. Its output tubes became unmatched after only a few months and needed to be replaced to have low distortion again. It happened over and over.
If so, can you share the circuit? I'm curious as to how anybody could screw up a valve amp design so badly.output tubes became unmatched after only a few months and needed to be replaced
There is an ugly old lady in my neighbourhood who walks her old dog on my street every day. They are boring but are fine.
There is a pretty young lady who walks her young dog and they are extremely lively and attractive.
They both do the same thing but are very different.
The output transformer in a vacuum tube amplifier messes up the high frequency response and provides poor damping of resonances of the speaker. The transformer adds distortion especially at low frequencies. A semiconductor amplifier does not have an output transformer.
Maybe. But I think the "retro" store is going bankrupt because nobody buys antique tubes anymore.You are missing a business opportunity there Audioguru, for $149.99 you could make them yourself and sell them at profit!
Level Five, 45 watt Class A parallel single-ended no feedback mono triode power amplifiers with ultra simple fully transformer coupled circuit topology with in-house designed and wound input, driver and output transformers, all Audio Note™ silver wired, AN Perma 50 double C-cored, 2 watt Audio Note™ tantalum resistors, Black Gate™ WKz and NH type capacitors in power supply, Black Gate™ N-type decoupling capacitors, no signal coupling capacitors whatsoever (!), valve compliment, 4 x NOS VT4-C/211, 4 x NOS 5R4WGB, 2 x NOS VT25/10Y
I've never used one, but from just a physics point of view, I'm always interestedDoes Anyone from you use this today for new design ?
Sometimes I wonder who designs these things!A pair of Audionote GakuOn, just $250000 for the pair
Sometimes I wonder who designs these things!
If I ever got round to it, personally I'd make it look classical (wood box, hidden
tubes) rather than some of these metal, glossy, unfriendly modern designs.
But I guess they have a market, so maybe I'm showing my age!
The store that sells extremely expensive antique vacuum tubes also sell extremely expensive amplifiers with vacuum tubes glowing on top.
The vacuum tubes are for show since they are not part of the solid state amplifier circuit.
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