Linehand
Active Member
Thought I'd share this setup with you guys. My (mostly restored) Fisher 800c was still running very hot after a few hours of use. Primary transformer surface temp was up to 145° and the output tubes were cooking the wall behind them...
These fans have a temp probe lead which can be placed anywhere on the chassis to regulate fan speed and maintain steady temps. I have one probe placed in the center seam on top of the main trans and the second fan probe placed on the chassis between the output tubes and secondary transformers (just behind the heat shield transformer side).
I'm still experimenting with placement, pardon the semi permanent rigging. In this position the fans run just above idle, stay whisper quiet, and everything (including tops of output tubes) is barely warm to the touch, even after several hours of use.
I have tested these off a 12v battery and a wall wart. Neither are inducing any noise as far as I can hear. I'm currently on the wall wart, which I ripped off my son's fish tank and included a switch and LED (RIP Finn the beta fish)
The fans are Arctic F12 TC and are pretty inexpensive peace of mind. I didn't find anything like this searching the forum so I figured I'd share.
Man I love the sound of this Fisher...
These fans have a temp probe lead which can be placed anywhere on the chassis to regulate fan speed and maintain steady temps. I have one probe placed in the center seam on top of the main trans and the second fan probe placed on the chassis between the output tubes and secondary transformers (just behind the heat shield transformer side).
I'm still experimenting with placement, pardon the semi permanent rigging. In this position the fans run just above idle, stay whisper quiet, and everything (including tops of output tubes) is barely warm to the touch, even after several hours of use.
I have tested these off a 12v battery and a wall wart. Neither are inducing any noise as far as I can hear. I'm currently on the wall wart, which I ripped off my son's fish tank and included a switch and LED (RIP Finn the beta fish)
The fans are Arctic F12 TC and are pretty inexpensive peace of mind. I didn't find anything like this searching the forum so I figured I'd share.
Man I love the sound of this Fisher...