[MRCA] ARC-2A loading into 50 ohms

[Rob Flory]

Hi Mark,

Try 400pF as your capacitance.

You can lower the resistive component by putting 2 lengths of 50 ohm line
in parallel with each other between the antenna and the series capacitor.

RF

On Sat, Jun 8, 2013 at 2:31 PM, Mark <mbdittmar at comcast.net> wrote:

> **
> Hi-
>
> I recently fired up an ARC-2A transceiver I have here,  and just can't
> seem to load up to full power ( 180 ma at 500 VDC ) with it on 80
> meters...best I can do is about 100-110 ma.  The tubes are good and my PS
> is more than capable of suppplying the current.  I know they were designed
> to run into a reactive load and a lower resistance, so I've tried adding
> series capacitance in series with the antenna,  then tried some shunt
> capacitance, but still peak out at about the same value of plate current.
>
> Anybody use one of these with a 50 ohm antenna ?  What if anything did you
> use to obtain more amp loading ?
>
> My antenna is an inverted L, fed at the base with an autotuner...so should
> generally look like 50 ohms at the shack end of the coax.
>
> Thanks and 73
>
> Mark ABØCW
>
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