Yes I do have a little 811H amp and I am using the REMOTE connector
on the 990 for keying the amp. Since it was freed up my intention were
to use pin 3 on the RTTY connector. I also figured on connecting pin 4
(Ground) to the shell of the RCA connector that plugs into the PTT
line on the DSP unit.
I am measuring between those two pins (3 and 4) I get a couple volts
DC between the those two pins when not transmitting and it moves a bit
to the negative side when transmitting. DC resistance between the two
is about 500 ohms normally and about 20 ohms when transmitting. Could
be I am getting leakage someplace. I am using a old Radio Shack VOM
for the measurements. Probably would be more meaningful with a VTVM.
Maybe I do not need the Ground .. just the PTT sig.???
-----Original Message-----
From: Grover Yarbrough <grover3@nortexinfo.net>
To: Bill Brannick <WmLB@prefer.net>
To: <yaesu@contesting.com>
Date: Thursday, February 25, 1999 3:38 PM
Subject: Re: [Yaesu] Another DSP-59Y Question.
>My PTT comes from Pin 6 of the REMOTE connector on the back of the
990.
>This signal also keys the amplifier should one have an amp.
>I am not sure where you saw the the voltage. Pin I mean. Good luck.
>
>Grover
>
>
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