tlgibbs
Well-Known Member
First let me say I don't know a heck of a lot about tubes. I have a Motorola tube console that I really like a lot, and an old Fisher tube preamp tuner that I barely ever use. I enjoy the Motorola a lot and play it regularly, primarily for FM.
I found a Fisher console, I think built in the late 50's, maybe 1959. I pulled the preamp tuner power amp out to evaluate. The chassis is 610-ST. There is also a separate power amp for the second channel for stereo, a 30-A, but I have not pulled it to evaluate.
The 610-ST sounds great, but there is a hiss when the volume knob is turned all the way down. It is present no matter what source is selected. I have sprayed all the pots and checked to make sure the tubes are all seated by pulling them out of their sockets, spraying the socket holes with contact cleaner and replacing.
So what is the consensus on the 610-ST and 30-A? My gut tells me they are decent, and the sound so far is in my opinion pretty good. I'm trying to get an idea about how they are regarded before sinking any repair money into them. I wish I had some way of determining if I have a bad tube without taking the units to my repair guy.
Any thoughts? :thmbsp:
I found a Fisher console, I think built in the late 50's, maybe 1959. I pulled the preamp tuner power amp out to evaluate. The chassis is 610-ST. There is also a separate power amp for the second channel for stereo, a 30-A, but I have not pulled it to evaluate.
The 610-ST sounds great, but there is a hiss when the volume knob is turned all the way down. It is present no matter what source is selected. I have sprayed all the pots and checked to make sure the tubes are all seated by pulling them out of their sockets, spraying the socket holes with contact cleaner and replacing.
So what is the consensus on the 610-ST and 30-A? My gut tells me they are decent, and the sound so far is in my opinion pretty good. I'm trying to get an idea about how they are regarded before sinking any repair money into them. I wish I had some way of determining if I have a bad tube without taking the units to my repair guy.
Any thoughts? :thmbsp: