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Old 30th May 2007, 03:48 PM   #1
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Default plate load ccs ala gary p question

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?

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Old 31st May 2007, 04:32 PM   #2
kevinkr is offline kevinkr  United States
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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.
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