Thanks for the suggestion. But even without
disconnecting the Centurion, the distortion is gone in
standby (bypass) mode. I need the higher power level
(500w or so) to cause the problem, and therefore can't
disconnect the amp's power cable to try and isolate
it. Guess if I had a second linear I could try that
instead of the Centurion, but I don't.
73,
Barry
--- Mike & Lara Pagel <pagel@wi-net.com> wrote:
> Disconnect the Centurion's power cable and remove it
> from your rf lines.
> Run cable directly from your rig to antenna or
> dummy. Is the distortion
> still there? The only way to confirm or eliminate
> the Centurion's power
> cable as the culprit is to test your setup with the
> offending system
> removed. Clean signal? You just found your
> problem. Still distorted?
> Keep looking.
>
> BTW, I'd try testing with NO ground - just to see
> what happens.
>
> Good Luck.
>
> 73, de Mike, K9UW
>
> -----Original Message-----
> From: owner-tentec@contesting.com
> [mailto:owner-tentec@contesting.com]On
> Behalf Of N1EU
> Sent: Thursday, May 27, 1999 7:12 AM
> To: tentec@contesting.com
> Subject: [TenTec] Still Plagued by RF -
> Omni/Centurion
>
>
>
> About two weeks ago I solicited help with distorted
> audio being caused by RF getting into my Omni 6. I
> added gobs of ferrite and shored up the ground
> connections, grounded the 961 & disconnected its
> speaker, grounded the dummy load, etc., etc.
> Thought
> I had it licked, but I checked yesterday on a second
> received and I'm still plagued by the distortion on
> 17
> and 10 meters when I run over a few hundred watts,
> even into only a dummy load. Plugging a serial data
> cable into the Omni seems to make it worse, even
> without the cable connected to anything else &
> loaded
> with ferrite. This makes me think the cable is
> acting
> like an antenna picking up RF that's rampant in the
> shack and exacerbating the problem. The main ground
> connection in the shack is about a 10 foot run of 1
> inch braid to an 8 foot ground rod.
>
> I had a glimmer of suspicion about the Centurion's
> power cable, which essentially runs the length of
> the
> house unimpeded. Any thoughts on whether that might
> be the culprit & is it worth loading the amp's power
> cable up with ferrite or ???
>
> All help appreciated.
> 73,
> Barry N1EU
>
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