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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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In Reply to: ASL Tulip Hum in left channel posted by boudy on March 15, 2007 at 10:41:28:
I hooked up my multimeter to the speaker terminals and was able to find the minimum level much more accurately that way. It turns out that the adjustment is very sensitive, a fraction of a turn results in a change of several millivolts.At the 8 ohm posts I was able to get the levels down to just under 3mv for one channel and 7mv for the offending channel. Since my speakers have a nominal impedance of about 6 ohms I switched to the 4 ohm posts. Here the hum levels were about 2mv and 5mv.
Fine tuning the adjustment and switching to the 4 ohm output brought the hum level way down, now I have to press my ear up tight to the speaker to hear it.
The discrepancy between the 2 channels indicates that there is still some kind of issue though. I will check out the connections next time I have the chassis open.
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Follow Ups
- Re: ASL Tulip Hum in left channel - Boudy 16:12:31 03/15/07 (0)
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