In Reply to: Help, Hum from CAL Alpha DAC posted by Isaac on July 2, 2003 at 13:21:06:
Have you recently moved the DAC closer to a transformer or another component ?
If not, the tube swap clearly indicates a tube problem.
I recommend that you buy US made tubes.
7025 is a special low hum version of the 12AX7.
RCA is probably the best sounding 7025 widely available.
Avoid GE and re-branded tubes (International, Zaerix, distributor's brands)
good luck
Carlos
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Follow Ups
- Re: Help, Hum from CAL Alpha DAC - Carlos 07/4/0313:53:02 07/4/03 (0)