Hi all,
I recently unearthed a Fisher Staesman IV from my grandparents house. I turned it on and it sounded pretty good. All the tubes were glowing so I figured I would take it and stop listening to music through a home theater. After listening for a bit at home I noticed the audio fading in and out, not completely but noticeable. Then I started to pan left to right. The right channel is missing clear treble. And the right channel's bass is cutting in and out. I had a bunch of ecc83 tubes laying around so I popped them in, and replaced the output transistors as these were the two easiest things to change. If I crank the volume an bass the full output will come through until I turn it back down to a listenable level. I'm new to tube hi fi systems. Do I need new output tubes? Also I noticed the white calendar between the ell80 tubes was REALLY hot. Any help is greatly appreciated.
I recently unearthed a Fisher Staesman IV from my grandparents house. I turned it on and it sounded pretty good. All the tubes were glowing so I figured I would take it and stop listening to music through a home theater. After listening for a bit at home I noticed the audio fading in and out, not completely but noticeable. Then I started to pan left to right. The right channel is missing clear treble. And the right channel's bass is cutting in and out. I had a bunch of ecc83 tubes laying around so I popped them in, and replaced the output transistors as these were the two easiest things to change. If I crank the volume an bass the full output will come through until I turn it back down to a listenable level. I'm new to tube hi fi systems. Do I need new output tubes? Also I noticed the white calendar between the ell80 tubes was REALLY hot. Any help is greatly appreciated.