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Old 25th October 2017, 10:09 PM
MrKettle MrKettle is offline
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Default WD88VA - phase splitter with CCS

Having only just noticed the C1 correction post so having an excuse to get into the amp and having more LM338s than I can ever use, I was wondering whether anyone has considered using a CCS in the phase splitter?

Obviously given that the anode voltage is raised from ground by quite a bit there would need to be something more than just the IC set as a current regulator otherwise it would be dissipating a huge amount, so is it a case of changing R6 to a lower value (8k2 or 9k1) and then inserting the IC above that?
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Old 26th October 2017, 01:56 PM
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pre65 pre65 is offline
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Default Re: WD88VA - phase splitter with CCS

I think you will find that an anode CCS for a valve would become the anode load, so any anode load resistor previously fitted would be redundant .
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Last edited by pre65; 26th October 2017 at 02:16 PM.
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Old 26th October 2017, 02:15 PM
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pre65 pre65 is offline
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Default Re: WD88VA - phase splitter with CCS

Thinking about my efforts with anode CCS, you might like to consider using two devices as a cascode CCS.

I used 2 of DN2540N5 mosfets on my GK-71 driver valve.
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