If the ARCDB is still up and running it was/is an excellent resource for this kind of info.
As an aside I noted a tube power amp by Synthesis required an "ultra Low Noise fan" using the entirely encased design shared by many ARC tubed power amps. I can't judge if it is a detriment or not because I have not actually heard an amp with a fan for any length of time. Intuitively it would seem like a bad idea especially if it doesn't have its own isolated circuit. Sort of like turning on a blender in miniature while watching TV (Old TVs anyway).
As an aside I noted a tube power amp by Synthesis required an "ultra Low Noise fan" using the entirely encased design shared by many ARC tubed power amps. I can't judge if it is a detriment or not because I have not actually heard an amp with a fan for any length of time. Intuitively it would seem like a bad idea especially if it doesn't have its own isolated circuit. Sort of like turning on a blender in miniature while watching TV (Old TVs anyway).