@dweller I have deduced with further testing that the problem is temp related. If I remove the cover and allow more ventilation the problem does not occur. Once the cover is put back on 15 mins later its back so I am thinking a resistor that is sensitive to heat or maybe a cap. Should be an easy fix as the problem is easily reproduced. I found a guy here in Atlanta that specializes in tube gear and I am going to drop it off today. I will report back on what the problem turns out to be.. thanks for all the replies.
ARC PH7
Hello everyone. Just want to run this buy you guys to see what comes out of it. I recently purchased gently used Audio Research PH7 phono preamp. The Preamp had 3 hours on the tubes according to the display. I have had it for a week now and till now it has worked flawlessly. Typically I will mute the preamp to change records, etc. Today I muted changed a record and when I unmated the right channel did not play. turned the unit off and waited for about 10 mins and powered it back up, and the right channel came back. muted/unmuted right channel goes out. According to the seller the PH7 lay dormat for a few years prior to selling it. I am wondering if it could be one of the tubes could simply be failing, but it seems more like a curcuit problem than a tube problem. Any thoughts or experience with this particular issue with the ARC PH7?
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- 18 posts total
- 18 posts total