[Elecraft] 2m internal transverter PTT out

[Rajiv Dewan]

Nice solution.

Unfortunately for me, I am trying to operate remotely.  I may just have to get a web switch and turn the amp on and off.  I am hoping that some one has a better solution. 

Raj, N2RD

> On Oct 20, 2020, at 11:52 AM, <hbjr at optilink.us> <hbjr at optilink.us> wrote:
> 
> Raj...
> I have the same issue, but a less elegant solution.  My 2 Meter amplifier
> has a remote head that has the keying input located on the back of it.  I
> opened it up and wired a toggle switch in line with the circuit with an LED.
> I labeled it STBY/OPR like on my Ameritron AL-1200.  I just flip the 2 meter
> amp "out" of the PTT circuit when I'm not using it.
> 
> Thanks,
> Hank
> K4HYJ
> 
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net <mailto:elecraft-bounces at mailman.qth.net> <elecraft-bounces at mailman.qth.net <mailto:elecraft-bounces at mailman.qth.net>> On
> Behalf Of Rajiv Dewan via Elecraft
> Sent: Tuesday, October 20, 2020 9:34 AM
> To: Elecraft at mailman.qth.net <mailto:Elecraft at mailman.qth.net>
> Subject: [Elecraft] 2m internal transverter PTT out
> 
> Dear Elecrafters,
> 
>   I have a K3 with an internal 2m transverter that I use with an external
> amp.  Initially I had the amp connected to PTT-out but that would key the 2m
> amp if I transmitted on any band.  To help with this, I put the optional
> jumper on P8 in the transverter so that it put out 5v on ant3 (2m out) while
> transmitting.  I then built a simple NPN grounded emitter circuit to key the
> 2m amp by grounding its PTT-in when 5v show up on output of the transverter.
> Here is the shocker:  5v show up on 2m transverter out whenever I transmit
> on ANY band.  How disappointing.  Am I missing something?  Is there a simple
> fix?
> 
> Raj, N2RD
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