[aprssig] HT-220 HT's for APRS

[Stephen H. Smith]

Robert Bruninga wrote:
> Has anyone used the old motorola HT-220 HT's for a simple cheap
> APRS radio? I found a box full of them in my garage. 
>
> I remember doing one years ago, and the only rub was the lack of
> a PTT relay.  I think I might just use some diodes and 1/4 wave
> line this time?
>
>   
Why would it matter if the unit uses mechanical relays or electronic 
switching for PTT?




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