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In the Forum: Melquiades Amplifier
In the Thread: Valve Preamplifier for Macondo/DSET
Post Subject: Thank you!Posted by N-set on: 8/5/2023
It's quite a marvel from what I can tell now. The overall sound is somewhat on the darker side but the preamp is still breaking in (although I gave it 30h benchtop burn in with the frybaby track). I also suppose it reveals the Dannoy and the room interactions, which Yamaha C2 was masking due to inadequate bass and which I have not optimized yet (the Dannoys sit very close to the floor). The bass is great btw, amazing from such moderate-looking speakers. Plus it's power cord is still burning in and not in the place. And I've been using ordinary, cheap speaker cables. I suspect at this level of resolution all that begins to matter. I'm very happy to have the TVC at the output to run my long cables and given that my sources are not as powerful as yours, in particular TU-X1 tuner needs quite some amplification. I used different parts than you do in some locations, in particular Soviet K40Y-9 and Dale resistors on the gyrator board (Rmu is 5W Mills) and Polish Miflex plastic coupling caps, recommended to me by a prominent Polish audio manufacturer whose sound I know and like (initially I had an eye on the V-caps). The tubes are Hytron VT62, pumping 18mA with 204V on the plates and -6V bias. I also have graphite plate Mazda's 801A, which I haven't tried yet.
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