From: Webster D. Williams <firstname.lastname@example.org>
To: email@example.com <firstname.lastname@example.org>
Cc: Bob Hirsch <email@example.com>; John/K4WJ
<firstname.lastname@example.org>; rohre <email@example.com>
Date: Monday, October 13, 1997 9:34 AM
Subject: [TenTec] RE: RFI to power supply speaker
>I'd like to thank all who replied, and let you know my progress.
>There was something I failed to mention: I'm running a Radio
>unit. This is an UNSHIELDED device in a plastic enclosure. I had
>forgotten about that. That was an ommission on my part.
>I've run into problems in the past when trying to ground this
>seems that it operates with a "floating ground". If you connect
>"ring" (DC ground) of the power input jack to "shack ground",
you get an
>instant blown fuse in the DSP unit!
Unfortunately, while the RS DSP does work, they are an RF horror,
and are <very>
susceptable to VHF - as you've discovered .....
>I think my next step is going to be to re-work my RF ground,
>consists of 5 6-foot ground rods connected with #6 solid wire in
>straight line leading away from my shack. I have that connected
>shack with stripped coax braid, which is about 8 feet long. I've
>all bands, and the RFI seems to be equal across the spectrum, so
>not frequency dependent.
Try connecting with all braid, the object is to achieve a low
<impedance> RF ground,
not necessarily the same thing as a low resistance ground.
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