Digital Thermometer to monitor bias
Moderators: pompeiisneaks, Colossal
Digital Thermometer to monitor bias
I started taking my amps temperature. Its interesting to see what actual F temps are on the tubes. is there any protocol for using temperature readings to set bias? Sorry if this is a crazy question.
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Stevem
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Re: Digital Thermometer to monitor bias
That's a crazy question so don't let your mind stay there for you long, but in the original tube data sheets there is a max temp number they give.
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Not screaming like the passengers in his car!
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Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
Re: Digital Thermometer to monitor bias
There's no protocol because the bulb temperature depends on:
- initial bias current and B+ voltage;
- loadline;
- signal applied;
- class of the amp;
- temperature of the surrounding air;
- speed of the surrounding air;
- temperature of the surrounding items;
- colour of the surrounding items.
But generally speaking most tubes suggest not to exceed 250 °C as bulb temperature.
- initial bias current and B+ voltage;
- loadline;
- signal applied;
- class of the amp;
- temperature of the surrounding air;
- speed of the surrounding air;
- temperature of the surrounding items;
- colour of the surrounding items.
But generally speaking most tubes suggest not to exceed 250 °C as bulb temperature.