The new Alphas were not the first to offer sequenced keying.
The 77 series of Alpha amps all featured "reverse keying."
This technology has been around since the first high speed vacuum relays
hit the market. The modern pin diode schemes are incredible! No moving parts,
and no noise.
(((73)))
Phil, K5PC
Subject: [AMPS] amp control
>
> thanks to all who have responded to my question on amplifier control ckts.
> I am not really all that familiar with most newer amps, only older stuff,
> such as heathkit amps. I don't have access to much info on newer amps and
> haven't had the opportunity to repair any of them either. It appears from
> the responses I've gotten that maybe some of the mfrs. have figured out that
> "reverse control" might be the better way to go.at least the amp would be
> ready to go before the rf signal gets there, therefore eliminating
> hotswitching. thanks to all for updating me a little bit. It's still fun to
> learn!!!!
> carl / kz5ca
>
>
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>
>
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