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?
barnettk

Showing 1 response by cleeds

yogiboy
Instead of using the mute when silencing the output,you should just switch to another source on your preamp
The mute circuit in ARC preamplifiers is also part of the component's protection system. If you don't have a properly functioning mute circuit, you're losing a margin of safety.