I loaded the first stage of my phonostage with a cascode ccs based on gary's doa site.
Funny thing is the battery biasing the base of the lower transistor goes flat after a while (long while measured in days)
With the phonostage not powered up, I can measure voltage across the sensing resistor and I calculate a drain of 0.9mA which is what the ccs was designed to pass.
Does this make sense?
Dan
Funny thing is the battery biasing the base of the lower transistor goes flat after a while (long while measured in days)
With the phonostage not powered up, I can measure voltage across the sensing resistor and I calculate a drain of 0.9mA which is what the ccs was designed to pass.
Does this make sense?
Dan
As long as there is a path for current to flow the battery will go flat over time. The implication here is that before it does the operation of the ccs may be affected.
I don't have the schematic since the site seems to be gone now, perhaps you can post it if not in violation of copyright.
I don't have the schematic since the site seems to be gone now, perhaps you can post it if not in violation of copyright.
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