Jim Strohm wrote:
>
> I've seen some plans for relay-switched low-pass filters, and I guess by
> now somebody's got them working right. I still haven't seen any practical
> high-power auto-tune filters for HF -- these have been successfully
> implemented for microwave frequencies and milliwatt power levels, but even
> PIN diodes aren't quite fast enough at amateur price levels to "catch" a
> harmonic on keydown.
>
> I'd like to think it's possible to develop an affordable desktop kilowatt
> transceiver with output bandpass filtering that tracks the VFO and tunes
> after keydown and before transmission
Why aren't the relay switched low-pass filters that are used in all legal
solid-state amps adequate? What would be the advantage of 'tracking the VFO'?
73,
Vic, K2VCO
Fresno CA
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