[Elecraft] KIO2 question amp-keying

Sun Oct 6 19:11:03 2002

I'm pretty sure that the AMP is going to simply look for "dry
contact" type of switching IE; if you short the two wires from the amp on
the keying line, it will key.  You have two choices here.  Use the 8v out
of P9 to drive a relay and use the dry contacts on that relay to key the
amp or, build and install the amp-keying circuit which uses solid state to
do the same thing.

73 de John - KC4KGU
K2/100 #2490

On Sun, 6 Oct 2002 [email protected] wrote:

> Hello
> 
> I just installed the KIO2.
> 
> The reason was, that would drive the external linear with
> the KIO2, because I saw the is Pin 1(ground) and Pin 9
> to switch relais of an external amp.
> 
> I was wondering that I still hear the sidetone using U-6-25,
> instead of U8-4, when I switch over to U8-4 the sidetone
> was off.
> 
> Next I tried to switch the relais in the amp, nothing.
> 
> Is there only 8 volt out on pin P9 of the RS232 and this is
> maybe to low for the relais in the TenTec Centurion?
> 
> Did anyone switch the relais in the external amp with
> the KIO2?
> 
> 
> 73 de Harry, DK2GZ
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