How to modify the Icom 700 for Pactor - SailNet Community

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  #1  
Old 02-17-2012
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How to modify the Icom 700 for Pactor

Can anyone tell me how to modify the old Icom 700 SSB radio for the input and output connections for Pactor ?I know I need audio in and out as well as keying but Im unsure as to which section of the radio is best for the taps.Thanks All
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Old 02-17-2012
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from the SailMail site:

Icom M700

This is Icom's original HF marine radio. This radio has a number of disadvantages for use with digital communications.

There is no accessory jack with the necessary AF input, AF output, and PTT signals. The addition of an accessory jack will require you to have a radio technician modify the radio. Most radio technicians will (sensibly) refuse to do this modification because they feel that it is pointless to work on such an old radio. If you do decide to get the modifications done be sure to get the price quoted in advance, and then reconsider just replacing the radio.

Once modified, the M700 still is not ideal. It is only capable of about 50 watts continuous output.


I am a licensed tech and I would be very leery of modifying a type certified radio without the manufacturer's blessing.
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Old 02-18-2012
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If I remember correctly the M700 had a telephone style handset as an option. That means everything you need is at the microphone jack. If you can track down a spare connector you build a cable for you modem and swap back and forth. The downside is setting the volume at the right level every time.
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Old 02-18-2012
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Quote:
Originally Posted by SVAuspicious View Post
If I remember correctly the M700 had a telephone style handset as an option. That means everything you need is at the microphone jack. If you can track down a spare connector you build a cable for you modem and swap back and forth. The downside is setting the volume at the right level every time.
Yes, Dave is correct: the M700 was designed with a handset option, so there's audio at the mic connection.

Here are the pinouts:

1. AF Audio from main board
2. PTT PTT pin. Transmits when shorted to Pin 3
3. PTTE Ground pin for the PTT
4. MIC Ground Pin
5. MIC MIC Pin
6. NC
7. AF Connected to the built-in speaker. When the speaker switch is turned on while pins 1 and 7 are shorted, the built-in speaker is used

Bill
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Old 02-19-2012
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Hi I'm looking at buying M710 radio. Is this radio worth 750.00 with at130 tuner? I do not know anything about radios but like to have one on the boat for emergency at least.
Would I be able to get weather fax on this radio?
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Old 02-19-2012
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The 710 is a very good radio. You can get weather fax with that radio, a very cheap cable, some free software (JVCOMM32, multipsk, or fldigi), and a computer.
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