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Garage1217 project sunrise bias : multimeter or adjustment led

Tiranael

Member
Joined
Mar 14, 2021
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Hi, if someone have a garage1217 project sunrise I want to understand something. To adjust the bias I realized that if I adjust it with a multimeter (12VDC each side like said in the manual) the led to adjust the bias indicate that the voltage is too high. Which one is the best to use: Multimeter or the led on the side ? Maybe the 12VDC is an approximative voltage for certain type of tube. I know nothing about bias maybe different tube need different voltage.

Tube that I use now : Foton 6N6P 1968
Tube that came with the amp : RCA 12AU7 Cleartop
 
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