[ICOM] Fw: Icom 7600 and Kenwood TL-922A

[Paul Erickson]

Hi Gary,

I have another suggestion, why not deal with the problem at source? I 
have put soft key
mods in a number of amplifiers, and would recommend you do the same. 
Chances are, any
future rig that amp comes in contact with will have similar issues so 
why not render it safe
for all future possibilities? Check the Harbach site for schematics. I 
suspect that putting the
soft key mod in the amp will be cheaper than putting a relay in a box 
etc. And the solid state
devices won't likely wear out like a relay can. (Unlikely, I know, but 
possible).

If you have trouble coming up with the circuit, let me know and I will 
dig it up for you.

cheers, Paul - VA7NT

On 03/25/2011 02:44 PM, Gary Smith wrote:
> Thanks, Adam.  This is most helpful.  I agree and will build an external relay.
>
> Thanks again!
>
> Best 73,
>
> Gary
> WA1TJB
>
>
> ----- Original Message ----
> From: Adam Farson<farson at shaw.ca>
> To: ICOM Reflector<icom at mailman.qth.net>
> Sent: Fri, March 25, 2011 3:17:39 AM
> Subject: Re: [ICOM] Fw: Icom 7600 and Kenwood TL-922A
>
> Hi Gary,
>
> I would strongly advise the use of an auxiliary keying buffer between the
> IC-7600 and the TL-922A. The TL-922A keying line is rated at +120V/80mA, and
> has a keying spike. The MOSFET setting on the 7600 (*** not *** the LEAD or
> relay setting) may be safe, but I would still be concerned about the spike
> from the TL-922A. There is information about keying buffers on the following
> page:
>
>
> http://www.ab4oj.com/icom/auxrelay/main.html or
>
> http://www.qsl.net/icom/auxrelay.html
>
> Cheers for now, 73,
> Adam VA7OJ/AB4OJ
>
>
> -----Original Message-----
> From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net] On
> Behalf Of Gary Smith
> Sent: 24-Mar-11 19:19
> To: icom at mailman.qth.net
> Subject: [ICOM] Fw: Icom 7600 and Kenwood TL-922A
>
>
>
>
>
> ----- Forwarded Message ----
> From: Gary Smith<wa1tjb at yahoo.com>
> To: ICOM Reflector<icom at mailman.qth.net>
> Sent: Thu, March 24, 2011 9:43:24 PM
> Subject: Icom 7600 and Kenwood TL-922A
>
> I acquired a Kenwood TL-922A amplifier and am preparing to connect it to my
> Icom
>
> 7600.  On the 7600, the "send" connection default setting is 16V, 0.5A DC;
> it can also be set to 250V, 200mA using the Mosfet settings.  My problem is
> that the "send" on the 7600 connects to the RL Cont Jack on the TL-922A, but
> I am not
>
> sure what voltage setting to use on the 7600.  Does anyone have any
> experience with this?  I'd appreciate your input.
>
> Tnx and best 73,
>
> Gary
> WA1TJB
>
>