[ICOM] Older Icoms question

[Gary Fiber]

No reason you could not drag and solder a speaker wire to the center 
pin. It is a nice feature to have.
Remember though the IC-720 /A requires quite a bit more mic input than 
the newer Icoms do. They used the SM-8 set to HI level, SM-5 or HM7 hand 
mic. There are some other Icom mics from that vintage, but the newer 
electret mics will not drive the radio properly.

Have fun with it.

Gary K8IZ

On 9/21/2016 2:24 PM, John Geiger wrote:
> Thanks Jim,
>
> Sounds like that is not the case with the Icom 720.  Need to try a 735
> someday, everyone seems to love them.
>
> 73 John AF5CC
>
> On Wed, Sep 21, 2016 at 4:14 PM, Jim Hargrave <w5ifp at gvtc.com> wrote:
>
>> John,
>> I have owned an IC-735 since 1986. It has AF output on pin 8 of the
>> Mic connector.
>> I have operated this radio on Packet, PSK & RTTY since day 1.
>> However, I use the accessory #1 connector as it has fixed audio
>> output which lessons the possibility of overdriving the sound card
>> or TNC.
>> 73, Jim - w5ifp at gvtc.com
>>
>>>> -----Original Message-----
>>>> From: Icom [mailto:icom-bounces at mailman.qth.net] On Behalf Of
>>>> John Geiger
>>>> Sent: Tuesday, September 20, 2016 12:34 PM
>>>> To: ICOM Reflector <icom at mailman.qth.net>
>>>> Subject: [ICOM] Older Icoms question
>>>>
>>>> On the 1990 and later Icom models the AF output is also found on
>>>> the mic connector, on 8 pin, which is nice for building a simple
>> digital
>>>> modes interface.  Is this also true on the older Icoms like the
>>>> 720/730/740?  The manual never mentions it, but the wiring for
>> the
>>>> other pins is the same.  I have an Icom 720A on the way and want
>> to
>>>> start working on an interface for it.
>>>>
>>>> 73 John AF5CC
>>>> ----
>>>> Your Moderator: Dick Flanagan K7VC: icom-
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>>>> MHz Icom FAQ: http://www.qsl.net/icom/ To support
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>> ----
>> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
>> Icom Users Net: Sundays, 1700Z, 14.316 MHz
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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
>