Topband: F fitting adaptors

[Tom W8JI]

> When using a Ameritron remote antenna switch with SO-239 fittings, does 
> anyone know a supplier for female F fitting to PL-259 adaptor ?
>
> Thanks,
> 73
> Bruce-K1FZ

Bruce,

IMO, you have the wrong switch. A transmitting type high-power switch is a 
terrible device for receiving. The larger the relays (has a general rule) 
the greater the problem, and it has nothing to do with sealed (enclosed) or 
unsealed (open) relays.

High current relays are very problematic when only used at low power. The 
problem surrounds the large contact area and lack of wetting currents, and 
no significant voltage and current ever being applied to burn through any 
film on the contact. There are hundreds of papers by relay manufacturers or 
others detailing this problem, and it even occurs with brand new sealed or 
enclosed relays.

The only high power relays immune to this issue are vacuum type relays.

I think you are heading for long term problems with adaptors and a 
transmitting switch.

73 Tom