Some preamps not only want phono tubes left in, but if the tubes are not quiet they can cause issues with the power supply and can actually cause problems for your high level/line stage as well. Best bet is to call George Kaye and ask him. Then you will know for sure.
Leave tubes in phono section if not using it?
Hi,
I just bought a mid 1980's Moscode Minuet preamp (not Minuet in A) on AudioGon. I haven't received it yet, but I think it uses 4 12AX7's (2 in phono section, 2 in line stage).
I don't plan on using the phono stage. I was thinking of just pulling the tubes in the phono section with the hopes of reducing noise/hum and saving myself two tubes. But, I know I could use shorting plugs on the phono imput jacks to possibly eliminate some noise that way.
My question: Is it possible that pulling the tubes can upset some critical design parameter and create a detrimental situation, or even do some damage?
I will not have a manual or schematic for this unit.
Any thoughts would be much appreciated.
Thanks,
Rich
I just bought a mid 1980's Moscode Minuet preamp (not Minuet in A) on AudioGon. I haven't received it yet, but I think it uses 4 12AX7's (2 in phono section, 2 in line stage).
I don't plan on using the phono stage. I was thinking of just pulling the tubes in the phono section with the hopes of reducing noise/hum and saving myself two tubes. But, I know I could use shorting plugs on the phono imput jacks to possibly eliminate some noise that way.
My question: Is it possible that pulling the tubes can upset some critical design parameter and create a detrimental situation, or even do some damage?
I will not have a manual or schematic for this unit.
Any thoughts would be much appreciated.
Thanks,
Rich