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Author Topic: Biasing for KT77's?  (Read 2860 times)
Homebelly
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« on: March 01, 2011, 06:13:04 AM »
Any one running JJ KT77's?
Using the formula in the HRM manual in combination with my terrible maths i figure i should be biasing my HRM MKII to between 30-34mA.

Does that seem right?
The information i have on the KT77's say they have a plate dissipation of approximately 25 watts.

Cheers...
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JD0x0
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« Reply #1 on: March 01, 2011, 06:11:48 PM »
30-34 seems low to me. I'd suggest going up to at least 38-42mA. JJ's are overbuilt to withstand more current as well, which IMO causes more sterile tone at colder settings.
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