[Icom] Computer keying of Icom 751A using K1EA CT Software

Tue, 17 Jun 2003 07:00:00 -0700

What is actually driving cable connected to the 751? I ran into this=20
problem with my 765 & found that my keying transistor wasn't switching on=20
adequately - ie it wasn't being switched into saturation. I decreased the=20
value of the resistor driving the base of the transistor to increase the=20
base current  & that resolved the problem.

73 - Larry W=D8NFU
[email protected]

At 01:03 PM 6/17/2003 +0000, you wrote:

>Never had a problem making up a cable for keying a rig before but the Icom
>751A is giving me a bit of a problem.  I made up both a serial and a
>parallel cable yet both produce the same results, unintelligible CW!  The
>Icom key input wants to see a three part plug with ring and tip connected=
 to
>the keying circuit.  When I hook the computer to the rig and attempt to=
 test
>a buffer, this is where the problem starts.
>
>Anyone out there seen this before?
>
>73,
>
>Charlie, W0YG..>>
>
>
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