Sounds like the computer and the rig are not at the same AC ground
potential. That is, if you measure the AC voltage between those
grounds, you may be surprised to see tens of volts.
Best,
jerome - va7vv
On Fri, 23 Jan 2009 08:12:14 -0800, VE1BN <ve1bn@eastlink.ca> wrote:
> Ken -
>
> It never happened with my Paragon II. Is the noise you are
> experiencing
> still there when you pull the RS232 Interface Card? Maybe just needs
> reinstallation to see if the card connector needs cleaning. A bad
> ground
> perhaps? Or a poor connection at the cabinet rear connector?
>
> Don, ve1bn@eastlink.ca
>
>
>
>
> ----- Original Message -----
> From: "Ken Brown" <ken.d.brown@hawaiiantel.net>
> To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
> Sent: Friday, January 23, 2009 2:40 AM
> Subject: [TenTec] Paragon II RS-232 noise
>
>
>> I hooked up the serial data port on my Paragon II to my computer for
>> logging of the frequency. There is a buzzing noise in the
>> speaker/headphones with every data string. The volume of the noise
>> does
>> not depend on the band in use, whether an antenna or a terminator is
>> connected, the mode or band. The only controls on the rig that do
>> affect
>> the noise are the audio gain and the tone controls. Seems like the
>> noise
>> is getting into the audio stages, maybe through a power supply
>> common to
>> both the RS-232 board and the audio stages. Have any of you
>> experienced
>> anything like this with a Paragon or Paragon II? It never happened
>> with
>> my Omni VI.
>>
>> DE N6KB
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