painkiller
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- Jul 22, 2020
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Hello
my Mesa Mark IIc+ SRX needs new pre and power tubes.
I am on 220V here in Europe.
So i have done the steps described in this thread by @Boogiebabies
https://boogieforum.com/threads/iic-bias-question.8923/
My Plate Voltage is 500V on Pin3.
Tube Wattage - 6L6 = 30 divided by 500 ( plate voltage ) = 0.06
Multiply .06 X .75 ( optimal % MPD) = .045. Drop the 0 and your optimal bias for 75% MPD is 45.0
Then i measured with a Bias Probe Adapter with a current 6L6 Tube and get 39 mA.
So how do i see which tubes i need?
and which tubes do you recommend 6L6 and Preamp ?
I do Metal and dont like it too muddy....
Thank you very much
Paini
my Mesa Mark IIc+ SRX needs new pre and power tubes.
I am on 220V here in Europe.
So i have done the steps described in this thread by @Boogiebabies
https://boogieforum.com/threads/iic-bias-question.8923/
My Plate Voltage is 500V on Pin3.
Tube Wattage - 6L6 = 30 divided by 500 ( plate voltage ) = 0.06
Multiply .06 X .75 ( optimal % MPD) = .045. Drop the 0 and your optimal bias for 75% MPD is 45.0
Then i measured with a Bias Probe Adapter with a current 6L6 Tube and get 39 mA.
So how do i see which tubes i need?
and which tubes do you recommend 6L6 and Preamp ?
I do Metal and dont like it too muddy....
Thank you very much
Paini
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