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Re: [RTTY] FSK Keying of TS-590SG

To: rtty@contesting.com
Subject: Re: [RTTY] FSK Keying of TS-590SG
From: "Joe Subich, W4TV" <lists@subich.com>
Date: Fri, 23 Feb 2018 18:37:41 -0500
List-post: <mailto:rtty@contesting.com>

> 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@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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