See my previous post on this subject. I solved my RFI induced audio
problems with my Heil mics by tying the Heil's shield ground to both the
audio ground and to the Chassis grouns
Yep, the schematic is what it is. So is my Icom 775DSP rig, it's chassis
ground is not tied to the audio ground. I had severe audio problems on 15
and 10 meters. All RFI induced audio/Heil Mic problems went away when I
tied the Heil's shield to both the audio and chassis ground.
Now both my Orion and 775DSP no longer have audio problems with my heil
mics.....get great audio reports.
Ron .... NU1U
-----Original Message-----
From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]
On Behalf Of Kc9cdt@aol.com
Sent: Wednesday, June 23, 2004 22:59
To: tentec@contesting.com
Subject: Re: [TenTec] Heil ProSet adapter with Orion -- hum
Duane,
My guess is that when you connect the shield to chasis, you are also
connecting the internal circuit board to chassis ground also. Maybe that
causes some kind of ground loop? The circuit in the Orion mnual calls for
the shield to be connected to chassis ONLY.
Lee
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