Hey Dave,
David VanHorn wrote:
>
> >
> >Can't figure outbhow you'd connect the pin diodes anyhow!
>
> When forward biased, they're on, reverse is off.

Ah, yes, diode biasing! Maybe I should go back to my notes on that ...

Actually, I looked in the Farnell catalogue. A lot of their PINs are
SOT-23 (SMD is a pain) with access to an Anode-cathode or
Cathode-cathode join. What I was getting at was I thought you'd have a
prob with a diode D2 at the Rx i/p, if in its on state with S2 GNDing
the Rx i/p, attenuating the Tx o/p signal :-

Tx ---------|>|--------         \|/ aerial
     |S1    D1         |_________|
            D2         |
Rx ---------|<|--------
     |S2

Is that arrangemnet sorta what you meant?
>
> If that's too nasty, digikey carries some SPDT solid state switches for RF.

Getting the hang of diodes? It'll be tough but .............. I'll try
and hack it.

Regards - Ian


>
>

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