[ICOM] Icom 756 ACC jack and VOX

[Gary Fiber]

Used to be the PTT on either accessory jack would place the radio into transmit when grounded, and would go low when the radio was placed into transmit by the mic, CW key,or TX switch if equipped. Used to suggest hanging a relay coil across that pin and the 12 volts output on the acc jack. Every time to placed the radio into transmit, the relay would close and what every was attached to the relay, like and amp, would function.

Gary P. Fiber K8IZ
gfiber1952 at gmail.com
gfiber at comcast.net




> On Feb 13, 2016, at 9:00 PM, Kelly Taylor <ve4xt at mymts.net> wrote:
> 
> John,
> 
> What I've found on later Icoms (mine's a Pro iii) is the SEND pin on the OTHER DIN jack (the one you could use to key an amp or a transverter) doubles as another PTT input. 
> 
> I had to Macgyver an input for a foot switch for SS phone at the cottage, and found that if I grounded the SEND jack, it keyed both the radio and the amp. 
> 
> The DIN jack you're using is downstream of the mic amp and VOX circuits, so VOX won't work. 
> 
> 73, kelly, ve4xt 
> 
> Sent from my iPhone
> 
>> On Feb 13, 2016, at 6:35 PM, John Geiger <af5cc2 at gmail.com> wrote:
>> 
>> Hi Larry,
>> 
>> Thanks for clearing that up for me.
>> 
>> 73 John AF5CC
>> 
>>> On Sat, Feb 13, 2016 at 5:50 PM, Larry Young <k4lxv at bellsouth.net> wrote:
>>> 
>>> As has been stated before John, The VOX only works through the front panel
>>> microphone connector. The rear panel acc audio input will not activate the
>>> VOX. Also, a higher audio input level is required when using the rear acc
>>> audio input. Please refer to the manual for the proper levels.
>>> Larry K4LXV
>>> 
>>> 
>>>   On Saturday, February 13, 2016 5:00 PM, John Geiger <af5cc2 at gmail.com>
>>> wrote:
>>> 
>>> 
>>> I have fixed the VOX issue I was having with hooking the mic jack of my
>>> Icom 756 original to a lap top computer.  It is working fine now and I made
>>> a few QSOs in the RTTY WPX contest this morning. Still, it would be easier
>>> overall to hook it to the 8 pin ACC jack in the rear of the transceiver,
>>> and I could also use the computer as a voice keyer when hooked up this way.
>>> 
>>> Does the VOX circuit work on that jack as well?  I don't currently have a 8
>>> PIN DIN jack to wire stuff up and to check it out firsthand.
>>> 
>>> 73 John AF5CC
>>> ----
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>>> 
>>> 
>>> 
>>> ----
>>> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
>>> Icom Users Net: Sundays, 1700Z, 14.316 MHz
>>> Icom FAQ: http://www.qsl.net/icom/
>>> To support QSL/QTH.net: http://www.qsl.net/donate.html
>> ----
>> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
>> Icom Users Net: Sundays, 1700Z, 14.316 MHz
>> Icom FAQ: http://www.qsl.net/icom/
>> To support QSL/QTH.net: http://www.qsl.net/donate.html
> ----
> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/
> To support QSL/QTH.net: http://www.qsl.net/donate.html