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Why such high plate voltage in 2A3 DRD?
Why such high plate voltage in 2A3 DRD?
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Old 16th January 2007, 12:55 AM   #1
G is offline G  United States
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Default Why such high plate voltage in 2A3 DRD?

Every schematic I have seen has the voltage at 500v or greater. Why? It seems like you should be able to use the good old 250v plate -50v grid like the spec sheet suggests. Am I missing something?
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Old 16th January 2007, 12:58 AM   #2
jeff mai is offline jeff mai  Australia
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Default Re: Why such high plate voltage in 2A3 DRD?

Quote:
Originally posted by G
Am I missing something?
Yes.

Here's a hint: have a look at the 2A3 cathode resistor value in the DRD vs a typical design.
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Old 16th January 2007, 03:10 AM   #3
G is offline G  United States
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Default Re: Re: Why such high plate voltage in 2A3 DRD?

Quote:
Originally posted by jeff mai


Yes.

Here's a hint: have a look at the 2A3 cathode resistor value in the DRD vs a typical design.

Good old Kirchoff. Thanks. My brain doesn't seem to be working very well this evening.
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