[ICOM] IC-746 PRO Keying

[D C _Mac_ Macdonald]

AND, if you ALWAYS use a "stereo" plug on 
your straight key and use tip and sleeve 
you should be able to use it on ANY rig!
 
* * * * * * * * * * * 
* 73 - Mac, K2GKK/5 * 
* (Since 30 Nov 53) * 
* k2gkk at hotmail.com * 
* Oklahoma City, OK * 
* USAF & FAA (Ret.) * 
* * * * * * * * * * * 
 

 

> From: jeff.freedman at comcast.net
> To: icom at mailman.qth.net
> Date: Tue, 1 Jan 2013 09:25:14 -0800
> Subject: Re: [ICOM] IC-746 PRO Keying
> 
> Thanks Larry - now you see the source of my confusion. Analized the exact
> same resource as you.
> 
> I'll give it another shot next time I'm at that QTH (country cabin in the
> woods).
> 
> Appreciate your help - thanks again!
> 
> Jeff K7JF
> 
> Date: Mon, 31 Dec 2012 12:55:39 -0800
> From: "Larry L. Hinton" <hinton.ll at frontier.com>
> To: "'ICOM Reflector'" <icom at mailman.qth.net>
> Subject: Re: [ICOM] IC-746 PRO Keying
> Message-ID: <02fc01cde799$312c1ec0$93845c40$@ll at frontier.com>
> Content-Type: text/plain; charset="us-ascii"
> 
> Hey all.
> 
> I understand the confusion. The Instruction Manual (A-6085H-1US-2) states: 
> 
> a. Iambic Key paddle: Use a 6.35(d) mm (1/4") STEREO plug and connect to the
> [ELEC-KEY] jack located on the front of the radio. b. Straight Key: Use a
> 6.35(d) mm (1/4") MONO plug and connect key to the back of the radio. c.
> External Keyer: Use a 6.35(d) mm (1/4") MONO plug and connect to the back of
> the radio. d. Computer Keying: Use a 6.35(d) mm (1/4") MONO plug and connect
> to the back of the radio.
> 
> HOWEVER, the wiring diagram for the straight key (diagrammed to the [KEY]
> jack on the back panel) shows a "STEREO" plug with the tip as (+) and the
> sleeve as (-).
> 
> I found the service manual and took a look at the keyer [KEY] jack for the
> back panel. It actually makes no difference which plug is used as long as
> the (+) is tip and the (-) is on the sleeve. According to the schematic, the
> ring is not connected unless someone has modified the unit so shorting the
> tip and ring in this jack is not an issue.
> 
> I meant to add that if you use a STEREO plug for the straight key and wire
> it as shown in the manual, you can use it either in the front [ELECT-KEY] or
> the rear [KEY] jacks.
> 
> Larry
> K7YBZ