[ARC5] Another ARC-5 Transmitter Question

[Dennis Monticelli]

John,

C-62 is for neutralization.  It is actually a positive FB path which is
opposite in phase to the grid-plate capacitance.  In the ARC-5 design the
grid-plate capacitance is nicely minimized via good layout so a small fixed
neutralization cap is all that is necessary.

I don't know how HV is applied in multi-transmitter setups.  Can't help you
there.

Dennis AE6C




On Thu, Oct 31, 2013 at 11:40 AM, J. Forster <jfor at quikus.com> wrote:

> Suppose you have a stock configuration ARC-5 transmitter rack with 2 or
> more transmitters.
>
> Am I correct that ALL the 1625s will have both Plate and Screen voltages
> applied, but only the Tx selected for use will have the Cathodes of the
> finals grounded. The other tubes will be pretty much fully cut-off because
> of the 51k R-75 Cathode resistor.
>
> Also, is the connection through C-62 in the T-22 essentially negative RF
> FB around the final?
>
> -John
>
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