[Elecraft] K3 current status of TX INH?

[Barry N1EU]

Thanks for the response Dave.  Yes the Acom (and other amps w. qsk keying
loops) will work well without TX EN/INH wired.  But Acom recommends using it
whenever possible.  It provides not only a safety valve to cutoff the
transmitter instantly when there's a serious fault in the amp, but also
potentially provides improved qsk if the transceiver's timing fully supports
the keying loop.

I was just informed of a reflector posting of Dec 23 that I must have missed
(apologies) from Jerry N8BM at
http://mailman.qth.net/pipermail/elecraft/2007-December/079341.html

It's obvious upon reading Jerry's posting that an amplifier keying loop
function is NOT yet implemented on the K3, despite the firmware change to TX
INH - there's currently no way to get the K3 out of inhibit mode and begin
xmsn if it ignores PTT/key input while in inhibit mode.

So all we can do is wait and hopefully Elecraft will eventually announce
that they have indeed implemented support for amplifier keying loop in a new
firmware update.

73,
Barry N1EU



Dave G4AON wrote:
> 
> Barry
> 
> I run a K3/100 with an Acom 1000 on CW and can confirm the Acom 1000 
> doesn't need TX inhibit wiring. I cannot comment on other Acom 
> amplifiers. While the manual doesn't state the change over time of the 
> amplifier, discussion with the UK importer suggests it is changed over 
> prior to the 10 mS delay present with the K3 before RF appears.
> 
> The connections are a single phono to phono screened lead between the K3 
> and Acom for the keying and PL259 to PL259 for RF.
> 
> 73 Dave, G4AON
> K3/100 #80
> 
> 
> _______________________________________________
> Elecraft mailing list
> Post to: Elecraft at mailman.qth.net
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft    
> 
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
> 
> 

-- 
View this message in context: http://www.nabble.com/K3-current-status-of-TX-INH--tp15190922p15196916.html
Sent from the Elecraft mailing list archive at Nabble.com.