Topband: Switching Pennants

[Tim Shoppa]

Most common K9AY relay-switching configuration involves a single
transformer, with relay-switching at the high impedance side, and just
inches of run from the transformer to the relays to the loops. The unused
loops are left open (not connected either side).

The proposed single-transformer pennant relay configuration sounds almost
exactly the same. (Except no "reversing relay" as termination is
symmetrical.)

Pennants are typically just a little bit higher impedance than K9AY, yes?

Tim N3QE


On Tue, Aug 19, 2014 at 7:59 PM, Tom W8JI <w8ji at w8ji.com> wrote:

> I would not switch high impedance lines without very special precautions.
>
> I really do not think it is worth the small parts savings.
>
> ----- Original Message ----- From: "DGB" <ns9i2016 at bayland.net>
> To: <topband at contesting.com>
> Sent: Tuesday, August 19, 2014 4:38 PM
> Subject: Topband: Switching Pennants
>
>
>  I am wanting a simple way of switching 3 or 4 pennants. Anyone done this?
>>
>> Quote From K6SEE ... All four Pennants would be installed with their
>> points all adjacent to each other.  Only one feedline would be necessary
>> and only one
>> transformer would be necessary, with the high impedance winding of the
>> transformer being switched to the feedpoint of the Pennant in the desired
>> direction ... 73, de Earl, K6SE
>>
>> 73 Dwight NS9I
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