I am using TS950SDX and Heil headset. I think the basic should be same.
"TREMENDOUS HUM" --- are you using any scheme to reduce the sound card
SPEAKER OUTPUT level into the mic input ? Without this, the mic input is
completely over-driven and will pick up every back ground noise from sound
card into the rig.
My connection is following:
Using 600/600Ohm isolation transformer available at Radio Shack
One side is connected to the sound card SPEAKER OUTPUT directly.
The other side, I have 3 resisters. 470Ohm at hot end of isolation
transformer with series with 100Ohm to ground. At the junction of
470~100Ohm, added 2kOhm resister. The other end of 2kOhm is connected to
mic input to the rig. Of course the ground end is obtained at the same
spot with 100Ohm.
I have Heil tapped into the microphone connector directly in parallel with
the connection from sound card.
You can adjust the mic gain on your rig with Heil headset, and make sound
card output level equal to Heil at the Windows.
This is very basic configuration. I am not even using relays to select the
audio (sound card/headset) but works.
For recording .wav files, I have another cord build with isolation
transformer (but no resister at all, 3.5mm plug~transformer~3.5mm jack,
that's all) and simply make hard-switching (manually switching around, hi).
The hoot switch can be directly connected to behind of your FT1000MP, right
?
Hope this will work.
73, Jon Suehiro nn5t@arrl.net
----- Original Message -----
From: Michael L. Therrien, MD <n1md@snet.net>
To: <writelog@contesting.com>
Sent: Monday, October 30, 2000 7:11 PM
Subject: [WriteLog] Soundcard and FT-1000MP
Any ideas about how to configure a FT-1000MP, soundcard, WriteLog, and Heil
headset with footswitch?
I connect the Heil microphone to the soundcard mic input, audio ouput from
soundcard to patch in on the FT-1000MP, audio output from MP in front into
the Heil headphones. I have tried the isolation transformer that K5ZD
referred to in his post some months back. I have done an extensive review of
the reflector archives.
I still have a TREMENDOUS HUM on my signal.
I have run out of ideas -- though few are my own since I am strictly an
appliance operator.
Appreciate the help.
Mike, N1MD
Michael L. Therrien, MD, MMM, CPE
Amateur Radio Station N1MD
"Next year, aluminum."
--
WWW: http://www.writelog.com/
Submissions: writelog@contesting.com
Administrative requests: writelog-REQUEST@contesting.com
Problems: owner-writelog@contesting.com
--
WWW: http://www.writelog.com/
Submissions: writelog@contesting.com
Administrative requests: writelog-REQUEST@contesting.com
Problems: owner-writelog@contesting.com
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