[Elecraft] K3_CW_Data_Mode

[Joe Subich, W4TV]

>  A while back, I made a suggestion to Wayne that perhaps the
> "TX inhibit" pin on the ACC port could be given another purpose 
> - to invoke "TUNE".  I envisaged a new config setting like 
> "CONFIG:TX INH" = "HI=Tun" or "LO=Tun". Wayne seemed to think 
> it wasn't a bad idea, but would be very low priority, based on 
> demand.  It seems like this model may work for the Quadra 
> application too, without having researched it at all.

While repurposing the "TX Inh" pin has appear for non-Quadra users, 
it is a step backward when the Quadra or FL-7000 is used since 
both of those amplifiers utilize the inhibit input ("Linear" 
in most Yaesu manuals).   

If an antenna tuner has an output that holds causes the transceiver 
to generate a carrier, there is no reason that it can't be tied to 
the "key" jack as long as the K3 will generate a carrier whenever 
the Key jack is closed.  

If DigOut 0 could be used to generate a 750 ms (greater than 600 
msec) contact closure to ground if ATU Tune is pressed when the 
KAT3 is not fitted or is turned off - preferably on a per antenna, 
per band basis, and set the power level to the "Tune" level for 
that transmission only - if the Key In jack generated a carrier 
on all modes, the K3 would be instantly compatible with any tuner 
that used the Icom AH-3/AH-4 interface and could use the ATU Tune 
button to initiate tuning.

73, 

   ... Joe, W4TV 
   
 


> -----Original Message-----
> From: dseven at dseven.org [mailto:dseven at dseven.org] On Behalf
> Of Iain MacDonnell - N6ML
> Sent: Wednesday, December 30, 2009 3:02 PM
> To: lists at subich.com
> Cc: Mike K2MK; elecraft at mailman.qth.net
> Subject: Re: [Elecraft] K3_CW_Data_Mode
> 
> 
> On Wed, Dec 30, 2009 at 6:42 PM, Joe Subich, W4TV
> <lists at subich.com> wrote:
> >
> >
> >> The K3 tune button already works in Data mode. At least in AFSK A.
> >> Did I misunderstand the question?
> >
> > Yes, you misunderstood the purpose of the question.
> >
> > The Yaesu Quadra provides a contact closure when the T-F
> Set button on
> > the Quadra is pressed.  The T-F button causes the Quadra tuner to
> > retune, etc. if it is pressed and the amplifier gets at 
> least 75 Watts
> > drive.
> >
> > If the K3's "Key" (straight key) input were active in data
> modes, the
> > T-F output from the Quadra could be connected to the Key
> jack and the
> > K3/Quadra interaction would be fully automatic (if one used
> the N0SS
> > designed cable) just as it is with any of the Yaesu transceivers.
> >
> > Unfortunately, the K3 does not have an unused DigIn line
> that could be
> > used as a dedicated "T-F input" but enabling the Key input in all
> > remaining modes (Data, AM, and FM) would be an entirely 
> satisfactory
> > solution.  If closing that contact were to use "Tune PWR" in
> > Data/AM/FM, it would be icing on the cake.
> 
> I have an automatic antenna tuner that can "tell" the rig
> when to transmit, for retuning purposes. A while back, I made 
> a suggestion to Wayne that perhaps the "TX inhibit" pin on 
> the ACC port could be given another purpose - to invoke 
> "TUNE".  I envisaged a new config setting like "CONFIG:TX 
> INH" = "HI=Tun" or "LO=Tun". Wayne seemed to think it wasn't 
> a bad idea, but would be very low priority, based on demand. 
> It seems like this model may work for the Quadra application 
> too, without having researched it at all. If there's enough 
> demand, maybe it could be reprioritised...
> 
>     ~Iain / N6ML