[TenTec] OrionII & Heil Proset 5 audio problems

[Ron Castro]

There is a factory "fix" for a known RFI issue in the Orion II headphones 
circuit.  This usually shows up as RFI during transmit, but I suppose a 
strong nearby AM broadcast signal could cause the same result even if you 
don't have transmit RFI.  You can test this theory if you have a ferrite 
loop that you can wrap the headphone wire around as close as possible to the 
connector.

If that turns out to reduce or eliminate the problem, you can get a plug-in 
board from the factory that filters the RFI out of the headphone circuit. 
Installation requires removing the front panel, but needs no soldering, 
cutting or any other 'surgery'.  Since the board lives inside the radio, 
there are no dangling wires, boxes, filters, etc.

                     Ron  N6IE
                www.N6IE.com



----- Original Message ----- 
From: "M. Todd Miskel" <kt0dd at bresnan.net>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Monday, April 02, 2007 11:13 AM
Subject: [TenTec] OrionII & Heil Proset 5 audio problems


> Hello, I am getting AM broadcast audio into the MON audio with my new heil 
> proset 5. I checked the mic adapter wiring per the 02 manual and the 
> adapter is wired correctly with the separate grounds. The TX audio is 
> clean with no AM signals getting into it. I only hear it in the headphones 
> when using the MON to set my audio levels. Any clues as to a fix? 73.
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