Grummer, I've ordered a pair of the new (vertical) versions of the AQ1006s, so your comments are VERY interesting. Other than tubes, are your amps still original...caps, resistors, etc? I've been thru the schematic for the just-superceded version, and it's ripe for improvement, as someone above said. The almost-1000VDC output-stage power supply presents problems for replacement caps; I believe I'll be using 500V. Panasonic TS-UPs in the 1st pole and a 51/1500 Solen metallized 'propylene in the 2nd. I really like the idea of this amp's tube-regulated front-end powersupply. The rest of the amp is pretty standard in what it will get for parts upgrades. I have hand-written notes and a notated schematic that I'll e-mail to anyone who asks--jeffreybehr(at)cox(dot)net.
Have you tried the more-generic Shuguang 845 tube v. the ValveArt 845 and noticed any differences? The former are a little less expensive, but the latter can be bought in matched pairs, FWTW in mono-SETs, for $80/pr. from Advantage Tube Services in FL.
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Have you tried the more-generic Shuguang 845 tube v. the ValveArt 845 and noticed any differences? The former are a little less expensive, but the latter can be bought in matched pairs, FWTW in mono-SETs, for $80/pr. from Advantage Tube Services in FL.
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