[Elecraft] Adding PTT Out Switching to a K3

[N4ZR]

Thanks, Frank - I knew there was some way to do it, just didn't know what.

73, Pete N4ZR
Check out the Reverse Beacon Network
at <http://reversebeacon.net>, now
spotting RTTY activity worldwide.
For spots, please use your favorite
"retail" DX cluster.

On 11/7/2019 11:53 AM, donovanf at starpower.net wrote:
> Hi Pete,
>
> If the open circuit (unkeyed) voltage*/is the same polarity/* for both 
> devices,
> you can connect a diode in series with each keying line. Then connect
> both diodes to the KEY OUT (not PTT !) jack.
>
> The voltages */do not need to be identical/*, just the polarity
>
> 73
> Frank
> W3LPL
>
>
>
> ------------------------------------------------------------------------
> *From: *"N4ZR" <n4zr at comcast.net>
> *To: *elecraft at mailman.qth.net
> *Sent: *Thursday, November 7, 2019 4:44:41 PM
> *Subject: *[Elecraft] Adding PTT Out Switching to a K3
>
> I need to be able to disconnect the antenna to my SDRs when
> transmitting.  This used to be easy but now my PTT Out jack is committed
> to the KPA-1500.  I'm looking for suggestions of how best to accomplish
> this - I don't believe sequencing is required, just a second PTT output.
>
> Ideas?
>
> 73, Pete N4ZR
> Check out the Reverse Beacon Network
> at <http://reversebeacon.net>, now
> spotting RTTY activity worldwide.
> For spots, please use your favorite
> "retail" DX cluster.
>
> On 11/7/2019 9:30 AM, Ray Albers wrote:
> > ….thanks to comments and suggestions from K9ZTV and W2CS.
> >
> > My K3 has the Sub Receiver installed, and I have been playing around 
> with
> > diversity reception, using a random wire connected to the sub-receiver
> > antenna input BNC connector.  Apparently the carrier operated relay that
> > protects the receiver from overload is being triggered by lots of RF 
> coming
> > into that random wire. When I disconnect the receive antenna, no more
> > clicking. Now that I know what it is, I'll just ignore it. Or maybe 
> someday
> > I'll rig a manual T-R switch arrangement to disconnect the sub receiver
> > antenna except when actually using it.
> >
> > Thanks, gents!
> >
> > 73
> > Ray K2HYD
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