Hi Fi Fan
Active Member
Hi everyone,
I recently picked up a Fisher 800c that was apparently restored 2 years ago by http://aeaaudio.com
Yesterday on startup I heard a loud popping static like sound out of the right channel even when volume was turned down. Today it happened again and I shut down power immediately and swapped the tube sets from channels left and right. On startup, one of the now left channel (original right channel) tubes was redlining and very hot. Power was shut down immediately. Does this sound like just like a bad tube or could it be something more serious?
I opened up the bottom chassis and it appears that a bias adjustment has been added for each channel (blue circles with slots). Can anyone confirm based on the following photo?
Thank you.
I recently picked up a Fisher 800c that was apparently restored 2 years ago by http://aeaaudio.com
Yesterday on startup I heard a loud popping static like sound out of the right channel even when volume was turned down. Today it happened again and I shut down power immediately and swapped the tube sets from channels left and right. On startup, one of the now left channel (original right channel) tubes was redlining and very hot. Power was shut down immediately. Does this sound like just like a bad tube or could it be something more serious?
I opened up the bottom chassis and it appears that a bias adjustment has been added for each channel (blue circles with slots). Can anyone confirm based on the following photo?
Thank you.