[Elecraft] 2m internal transverter PTT out

[hbjr at optilink.us]

Maybe a web controlled appliance plug?  I have one that operates a
dehumidifier that I can operate with an app on my iPhone.  Use something
like that that has a relay inside - just wire it up for your amp main.

 

From: Rajiv Dewan <rdewan at me.com> 
Sent: Tuesday, October 20, 2020 12:15 PM
To: hbjr at optilink.us
Cc: Elecraft at mailman.qth.net
Subject: Re: [Elecraft] 2m internal transverter PTT out

 

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 <mailto:hbjr at optilink.us> >
<hbjr at optilink.us <mailto: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:  <mailto:elecraft-bounces at mailman.qth.net>
elecraft-bounces at mailman.qth.net < <mailto:elecraft-bounces at mailman.qth.net>
elecraft-bounces at mailman.qth.net> On
Behalf Of Rajiv Dewan via Elecraft
Sent: Tuesday, October 20, 2020 9:34 AM
To:  <mailto:Elecraft at mailman.qth.net> 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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