Or you could clip lead in the battery and measuring equipment to determine regulated curent amount.

Do measure before runnig extensively. You could get fairly close by adjusting current to give ~130 volts on the plate. With the 2x LED bias, it should be between 10 and 15 mA which is quite LED-safe.
regards,
Douglas

Here's a really stupid qestion: To measure current on a DVM, does the meter need to be in series with what you want to measure? I clip the leads to the plate and ground and get 130 V no problem. If I switch the meter to measure current I get zero....Colin

however, we are working downstream of the CCS so it may never get a current overload. I must try this on my linestage. All the current ought to pass through the meter ( the LED's will go out ) instead of the valve.

My first suspicion s that yo have blown the meter's some point. Don't fel silly about that. I buy those .25 A fuses in bulk...
regards,
Douglas

Impact on circuti should be nil.

Joe

Just be sure you don't try this from the mu output, as damage couldbe done the mosfets, and there is no way to get an real meanurement w/o including R3.

I am going to try this on my valve pre-where I can't test w/ a 9V out of circuit.

Thanks for showing me this method.
regrds,
Douglas