K3 - keying an amp

[GW0ETF]

Hi All,

Just acquired my very first amp (Acom 1K) and intend hanging it off the
back of my K3 in due course. According to my reading of the manual there
is just a Key-Out line for switching an amp but no input back from the
amp to inhibit the K3 tx until the amp is ready ('ground when ready', TX
Inhibit etc...)

So was wondering if I'd missed something here and also was wondering if
there is a variable delay function to adjust the timing between Key Out
switching the amp and the K3 squirting out RF? Using a FT990 at the
moment which has a TXInhibit function though apparently the timing even
then is a bit tight for some amps' relays. As I said, it's my first amp
so virtually no experience at interfacing these things and don't want
fireworks, bonfires or welded relays with a new amp *and* new K3...!

73,

Stewart Rolfe, GW0ETF




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[GW0ETF]

Stewart Rolfe wrote: (without reading the FAQ....)
> .......and also was wondering if there is a variable delay function to
> adjust the timing between Key Out switching the amp and the K3
> squirting out RF?
>
> 73,
>
> Stewart Rolfe, GW0ETF
Doh.....the FAQ says
"The variable delay is a feature that will be available after initial
shipment."

Still wondering about the TXInhibit feature though and whether (A) it's
a normal feature of most transceivers and (B) is it a useful feature for
modern amps like the Acom when wishing to operate CW/ full QSK?

73,
Stewart Rolfe, GW0ETF
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[Eric Swartz - WA6HHQ]

If a radio has proper Key-Out before RF sequencing, like the K3 and K2
do, this is NOT necessary. We have no problem running with relay based
amplifiers, including those with large, slow relays, like the SB-220 etc.

A few radios out there have a TX loop feature, but most others do not.
Its not needed with the K3.

73, Eric   WA6HHQ
====

Doh.....the FAQ says

> "The variable delay is a feature that will be available after initial
> shipment."
>
> Still wondering about the TXInhibit feature though and whether (A)
> it's a normal feature of most transceivers and (B) is it a useful
> feature for modern amps like the Acom when wishing to operate CW/ full
> QSK?
>
> 73,
> Stewart Rolfe, GW0ETF
>

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[Dave, G4AON]

Stuart

My K2 keys my Acom 1000 just fine. Full QSK too.

73 Dave, G4AON
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[Joe-aa4nn]

I have used the K2 PA Key Out to key the THP HFK1.5, no problem at all and expect the K3 to have a similar key out feature
de Joe, aa4nn

: [Elecraft] Re: K3 - keying an amp
>
>"Still wondering about the TXInhibit feature though and whether (A) it's
>a normal feature of most transceivers and (B) is it a useful feature for
>modern amps like the Acom when wishing to operate CW/ full QSK? 73,
>Stewart Rolfe, GW0ETF"

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