[RTTY] FSK Keying of TS-590SG

[Joe Subich, W4TV]

 > I can't tell you the optoisolator part numbers, but it worked
 > very well for me.

The optoisolator(s) are PC123, the current limiting resistor is 1K.

It works fine with +/-5V logic but I have not had occasion to use it
with "low power" (+/- 3.3V) ports.

73,

    ... Joe, W4TV


On 2/23/2018 5:53 PM, Bob Burns W9BU wrote:
> On 2/23/2018 2:49 PM, groupsrichart at gmail.com wrote:
>> I have tried two different interfaces using optoisolators to attempt 
>> FSK and PTT keying from a serial card to the rear panel ACC2 connector.
> 
> I used an interface very similar to this one 
> (http://www.w3yy.com/fsk.htm) for a few years with my Icom IC-7600. It 
> worked very well when driven by a real RS-232 COM port on a desktop 
> computer. I can't tell you the optoisolator part numbers, but it worked 
> very well for me.
> 
> Bob...
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