[TowerTalk] Best antenna switch ?

[Michael Tope]

Hi Zoli,

I made a 2 radio antenna switch network out of a bank of Diawa
2 position switches. These measured 80 to 90 dB isolation on a
network analyzer at HF. I think they also make a 4 position
switch, but I have no experience with it.

The only caveat I found with the Diawa switches is that the staking
epoxy they use to keep the copper ribbon switch contact from
rotating on the SO-239s, tends to break loose causing the contact
to rotate and the switch to malfunction. This can easily be fixed
by restaking with epoxy. I used a dab of JB weld on the one switch
I had trouble with. This has held up fine with 1.5KW RF output.

Mike, W4EF.......................

----- Original Message -----
From: <z.pitman@libertel.nl>
To: <towertalk@contesting.com>
Sent: Tuesday, June 13, 2000 5:58 AM
Subject: [TowerTalk] Best antenna switch ?


>
> Hi,
>
> I'd like to know, which is the best antenna switch on the market. My
father
> needs a 4-port device, which can handle 1.5 kW. If someone had measured
the
> isolation between the antenna ports and the isolation of the non-used
ports
> to the input (TX-side), I would like to know the results.
>
> Thanks, Zoli HA1AG
>
>
> I just measured one, of which name is just two characters of an ancient
> alphabet and found the isolation between a non-used ANT port to the TX
port
> to be a mere 26.5 dB.
>
>
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