[ARC5] BC-442-A ant relay

[AKLDGUY .]

Thanks guys. Those answers were pretty comprehensive.

Neil ZL1ANM

On 24/10/2017 10:22 AM, "Mike Morrow" <kk5f at earthlink.net> wrote:

> Some aircraft command antenna installations on larger aircraft were too
> long for effective loading by the highest frequency command transmitter
> BC-459-A.
>
> The series-connected capacitor was used to electrically shorten the
> aircraft antenna for the BC-459-A transmitter.  The BC-459-A ANT-post
> connects to one of the BC-442-A C-posts, through the vacuum capacitor to
> the other BC-442-A C-post, to the TR-post on the BC-442-A.  The other
> transmitter ANT-post connect directly to the TR-post on the BC-442-A.
>
> There is also the BC-442-AM, which lacks the vacuum capacitor.  It could
> be used in aircraft with shorter command antennas that the BC-459-A could
> load, or no BC-459-A transmitter installed.
>
> Mike / KK5F
>
> -----Original Message-----
> From: "AKLDGUY ."
> Sent: Oct 23, 2017 3:40 PM
> To: ARC-5 List
> Subject: [ARC5] BC-442-A ant relay
>
> Some of these have a vacuum capacitor mounted in the base with the usual
> Command set antenna connector at each end.
>
> What function did these capacitors fill - how were they used?
>
> Neil ZL1ANM
>
>
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