[Elecraft] K3 Transverter Control Cable

[Joe Subich, W4TV]

Don, 

> Based on information I received from Wayne, I do believe that 
> K3 ACC pin 7 is now dedicated to TX INH.  There were complication 
> in sharing it.  If the change is not in the firmware version you 
> are using, it will be with a forthcoming update.  In other words,
> it cannot be used for XVTR ON.

It appears that one can use pin 7 for "XVTR ON" if it is not being 
used for INH (at least that's the case with FW 2.02).  

If CONFIG:TX INH is OFF, pin 7 will be 5.0 V when the K3 is on and 
will work for XVTR power control.  If CONFIG:TX INH is set to either 
LO = INH or HI = INH, pin 7 can not be used (reliably) for XVTR 
power control. 

73, 

   ... Joe, W4TV 
 



> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net 
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Don Wilhelm
> Sent: Tuesday, June 24, 2008 3:21 PM
> To: Ian J Maude
> Cc: elecraft at mailman.qth.net; Bud Governale, W3LL
> Subject: Re: [Elecraft] K3 Transverter Control Cable
> 
> 
> Ian,
> 
> Based on information I received from Wayne, I do believe that 
> K3 ACC pin 7 is now dedicated to TX INH.  There were complication 
> in sharing it.  If the change is not in the firmware version you 
> are using, it will be with a forthcoming update.  In other words,
> it cannot be used for XVTR ON.  The +12 volt output from the back 
> of the K3 should do nicely even though it means "Y"ing out one 
> of the cable wires.
> 
> 73,
> Don W3FPR
> 
> Ian J Maude wrote:
> > Bud Governale, W3LL wrote:
> >> I'd like to make up a K3 Transverter control cable.
> >>
> >> Which pins of the Elecraft Transverter J6 DB-9 connector are 
> >> connected to which pins of the K3 AUX I/O?
> >>   
> > XV DB9      K3 DB15
> >
> > Pin                    Pin
> >
> > 1 ground            5
> > 6 auxbus            2
> > 8 XVTR ON     7
> > 9 PTT               10
> >
> > I hope that makes sense :)
> >
> > 73 Ian
> >
> >   
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