• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Newly CCS circuit from Pimm

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mrstone

Member
Joined 2003
Hi Folks,

Anyone try this new CCS circuit from Gary Pimm? I'm planning to use this circuit in 12B4a preamp, the operating point is Vp=100V, Ip=30mA. So,
Q1) how can I choose the value of R1 (=8V/30mA??)?
Q2) LND150 is not available in Hong Kong, any substitutions can be used?
Q3) How much voltage drop across the CCS?

Thanks in advance!!!

An externally hosted image should be here but it was not working when we last tested it.
 
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