[TowerTalk] Antenna switch isolation?

[n8de at thepoint.net]

Martin,
With careful orientation of the relays and grounding of unused  
contacts, 60db of isolation is possible.

The amount of 'internal coupling' between relays is the major  
difficulty when trying to get very good isolation.

73
Don
N8DE

Quoting Martin Sole <msole at loxinfo.co.th>:

> How much isolation should I be aiming for in a remote relay switch box. I
> have some 30A rated relays that look as if they will handle a fair amount of
> power. I can see only about 40dB of isolation across the open contact. I
> don't need it to go above 30MHz and 2kW handling should be fine. Antenna
> connections will be all low impedance. So 1kw into the common port will give
> me about 10mW at the open port, enough?
>
>
>
> Martin, HS0ZED
>
>
>
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