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Hi Everyone, My latest creation an integrated tube preamplifier. It uses only tubes in the active circuitry but has a digital remote control volume (resistor switched by relays) and source selection. Full phono preamp (like the Groove) and allows for passive or active line stage with a gain of 15 db. Still breaking in, but sounds lovely. It is not a simple project, although a good diyer could do it. Care in layout and wiring technique is important. I'll post a schematic when I get one cleaned up. BTW the PS uses 1500uf of 500VDC caps, heaters another 15,000 more and about 30uf of polys.
That amp looks awesome, really sweet!
Hi, Thanks, It sounds better than I thought it would with the substitute caps (Jantzen Crosscaps) in place of the Silver Zs on order and the power supply voltages are low by about 10% (new design transformer coming to fix that). Still a really clean sound. I expect to burn it in for a week or so and then do measurements on it.