Brought back out to update the OS from Windows XP to Windows 7. Replaced the IDE hard drive with a SSD drive. She's slow, 2 gigs of ram maxed out, but it's stable, allows me to stream from my NAS drive.
Yes that is a Sovtek 6922 tube built on a mother board. AOpen AX4B 533 Tube Motherboard to be exact "as far as I know, this was only done by the engineers at AOPEN, they made 2 types of these boards, both AMD and Intel based. I have yet to see the AMD board" Another Intel P4 based board was produced for the Japanese market, slightly different sound output capacitors on that board"
Its just a pre-amp, doesn't really get hot, just nice and warm. The motherboard is a outdated Intel P4 533mhz chip
set board. I feed this into my 6AQ5 single ended headphone amp with NOS tubes.
It was a really nice attempt at the time, the engineers went with quality capacitors, but they used the Realtek AC97 codec which isn't that great. From the tube output, it's only 2 channel, the board will do 5.1 out the optical output, but it takes a diffrent route not through the 6922 tube.
The sound subsystem of the motherboard consists of:
- Realtek ALC650 AC'97 codec;
- Vacuum tube (twin triode) Sovtek 6922 (Made in Russia) which can be replaced with any similar one;
- ELNA capacitors in the power circuitry of the tube;
- CARDAS copper cables between the amplifier and connectors;
- REL MultiCap capacitors in the sound section;
- VISHAY resistors.