[Elecraft] N8LP Tuning Relay success

[Hunsdon Cary III]

Dick, Jim, & Pete (W4WWQ):	
    Thanks for your help.  N8LP Tuning Relay now working as advertised.
The “Interrupter” was key to getting it to work and once, with the help of Dick & Pete, I figured the phono plug on the K3 belonged on the Key Out jack and not the PTT jack, 
it works perfectly.  As Dick explained, the KPA500 will not switch from Operate to Standby but there is no power output and no LED’s are lighting 
up while the SteppIR is tuning - this is one slick little box!
     Again, thanks for your help!
	73,
	Cary, K4TM
	Lynchburg VA

K3-100 #3448, KPA500 #0698, SteppIR 3-element @ 42'


On Jul 22, 2014, at 10:33 PM, Jim N7US <jim at n7us.net> wrote:

> Do you have the cable that goes between the K3 and the KPA500?  If so, a 15-pin gender changer with yellow tape around it should have been included.  Look in the manual for "interrupter."  It has pin 10 removed, which I think/believe is the PTT for the KPA500.  By using the interrupter you will have to key the amplifier with the connection you now have through the N8LP relay (I have one too, but I use it to prevent my 87A, my second amplifier, from transmitting when the antenna is tuning.)
>  
> Here, I found it on page 20:
>  
> <image001.png>
>  
> 73, Jim N7US
>  
>  
>  
> -----Original Message-----
> From: H. Cary [mailto:h3cary at gmail.com] 
> Sent: July 22, 2014 21:09
> To: Jim N7US
> Subject: Re: [Elecraft] N8LP Tuning Relay w/ K3/KPA500 - help, please
>  
> I'm not sure what you mean by "small interrupter," Jim....
> Tnx 4 your prompt response!
> 73,
> Cary
>  
> Sent from my iPhone in Lynchburg VA.
>  
> > On Jul 22, 2014, at 9:49 PM, "Jim N7US" <jim at n7us.net> wrote:
> >
> > Cary,
> >
> > I think it will work as you want if you use the small interrupter
> > between the end of the cable from the K3 where it attaches to the KPA500.
> >
> > 73, Jim N7US
> >
> >
> >
> > -----Original Message-----
> >
> >
> > Elecraft Reflector participants:
> > If any of y'all use the N8LP tuning relay w/ your K3 and KPA500, I
> > appreciate your help.
> > My kit went together smoothly and all ohm meter checks A-OK. When I
> > plug the relay into the SteppIR control box the green light comes on.
> > I have RCA phono plug cable running from the PTT connection on the
> > relay to the PTT In connector on K3 and another from the PA Key on Amp
> > to the LOOP plug on Relay box.
> > When I key PTT while SteppIR is tuning, KPA500 does not switch to
> > standby as I believe it should.
> > Obviously I'm doing something wrong.  I even tried the Key Out
> > connection on the K3 but that didn't work either.
> > Any thoughts would be appreciated!
> > 73,
> > Cary, K4TM
> > Lynchburg VA
> > H. Cary III
> > h3cary at gmail.com
> >
> >

H. Cary III
h3cary at gmail.com