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Re: Parafeed PP with current source on joined cathodes

Hi FB:

:::With the extra expense of 2 x chokes:::

yes... you do have the expense of the plate chokes. payoff is you will likely increase the PSRR.


:::addition of coupling cap:::

not really an additional cap in the signal path. If your building with a conventional series feed arrangement then the last cap in your power supply is in the signal path.... it occupies the exact same spot but will typically be a much larger value than the blocking cap.


:::+ the lower output power:::

not sure that I see that you would get less output power... if anything taking the plate's dc bias current out of the OT would reduce the heating losses across the OT. In the MQ magnetics library(at AA MQ forum) there is a paper on this topic.


::: is it worth it ? What are the benefits of this approach ? :::

greater PSRR, lower effective copper (heating) losses in the signal path, and you relieve the OT of any of the saturating effects of the dc bias current.


msl

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