K3 and 2m amp ptt

[Rajiv Dewan-2]

Hello all,

  I would like to have PTT out signal from my K3 that is ONLY activated when the internal K144XV transverter is transmitting.  I thought I might use the KRC2 with the K7MDL mod where the 8R signal is used to generate a band specific PTT output.  The problem: where do I find an 8R or equivalent (I guess 5R will do) signal on the exterior of the K3?  Can a pin on the ACC connector be used for this purpose?

BTW, I tried building a small interface that activates the amp PTT when a 5V shows on the transverter output.  Problem: 5V is on transverter output when K3 transmit on any band.  

Other ideas?

Thanks,
Raj, N2RD
K3 #170
--
Rajiv Dewan
[hidden email]



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[Don Wilhelm]

Raj,

A simple logic circuit to detect all zeros on the 4 band data lines and
the presence of Keyout-lp would do that task easily.

73,
Don W3FPR

On 1/10/2021 3:39 PM, Rajiv Dewan wrote:
> Hello all,
>
>    I would like to have PTT out signal from my K3 that is ONLY activated when the internal K144XV transverter is transmitting.  I thought I might use the KRC2 with the K7MDL mod where the 8R signal is used to generate a band specific PTT output.  The problem: where do I find an 8R or equivalent (I guess 5R will do) signal on the exterior of the K3?  Can a pin on the ACC connector be used for this purpose?
>
> BTW, I tried building a small interface that activates the amp PTT when a 5V shows on the transverter output.  Problem: 5V is on transverter output when K3 transmit on any band.
>
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