I am a beginner with tubes and I am wondering if I can tell anything about how well my two amps are working by checking tube temperatures? I have two Fisher 30a amps and I plan on keeping them. Thanks in advance for any info.
Some tubes require a particular orientation or spacing. In all tubes, the plate dissipation
(plate current x plate voltage) is related to their useful lifetime. The best thing you can do
in an existing amp is to accurately set the bias current, and allow good ventilation around it.
In certain situations a fan can make a big improvement, for all the amplifier parts.
(plate current x plate voltage) is related to their useful lifetime. The best thing you can do
in an existing amp is to accurately set the bias current, and allow good ventilation around it.
In certain situations a fan can make a big improvement, for all the amplifier parts.
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As long as the plates aren't glowing they are probably fine. Check in a pitch dark room.
As a point of reference, I just used my IR thermometer "gun" on my power tubes and they are running about 180 degrees C.
A much better way to know if your amp is running right would be to learn how to safely measure some of the key voltages/current and do the math to figure out tube dissipation.
As a point of reference, I just used my IR thermometer "gun" on my power tubes and they are running about 180 degrees C.
A much better way to know if your amp is running right would be to learn how to safely measure some of the key voltages/current and do the math to figure out tube dissipation.
