While I agree, RF in the shack can cause a rig to go nuts thus do
un-predicted things, I've allways thought that the true solution was to
"fix the RF in the shack" problem rather than make the station "RF
proof". Often it's easier to add a few "C"s and move a few cables but
the fact remains, there's RF in the shack.
I suggest looking at antenna positions, methods of feed, SWR and etc.
In my case moving the antenna (which may not be an option to some)
cleaned up not only the RF in the shack but also got the RF out of the
phone lines in the house.
73
Bob K4TAX
jreber@es.com wrote:
>
> I'm resending this as it was bounced last week...
>
> -----Original Message-----
> From: Jason Reber
> Sent: Monday, February 12, 2001 9:52 AM
> To: 'WILLIAM F MANSEY'; tentec@contesting.com
> Subject: RE: [TenTec] RE: Jupiter pros and cons
>
> Hello everyone:
> I found Fred's comments about the RF feedback problem very interesting- I
> recently had a similar problem with my Jupiter, except that rather than
> changing frequency, the ALC circuit was getting messed up causing my CW
> signal to go nuts. It would also cause hum on my PSK31 signal, and create
> nosie "lines" every 100 Hz or so over a range of a couple of Khz. (Thanks to
> the PSK ops that informed me of this and helped me troubleshoot it). After
> much frustration and searching, I finally found that by moving the power
> cable around, I could get rid of the problem. (I was using my Scout to
> listen to my own signal). I found that messy power cabling wiring, which
> splits near the back of the Jupiter to provide a power pigtail to my Omni D,
> was the culprit. By rerouting the cabling and cleaning things up a bit, I
> completely cleared up the problem. Tonight, I plan on adding a couple of RF
> bypass caps right near the Jupiter just as a safeguard.
> Other than that, the Jupiter has been excellent- on all modes and bands. I
> personally really like it for CW, as well as for SSB and digital modes. They
> really have a winner in this rig.
>
> 73's all around-
> Jason
> AC7JW
>
> -----Original Message-----
> From: WILLIAM F MANSEY [mailto:WA2PVK@prodigy.net]
> Sent: Sunday, February 11, 2001 10:10 AM
> To: tentec@contesting.com
> Subject: [TenTec] RE: Jupiter pros and cons
>
> Hello Fred and everyone,
> I love my Jupiter and have no complaints thus far. The only "problem" I
> have is that occasionally RF gets to it and causes it to change frequency.
> This is an intermittent problem and it is difficult to pinpoint exactly HOW
> the RF is getting where it does not belong. I have the remote knob and 705
> desk mike which tend not to stay in the same place so it is very likely that
> the stray RF is sneaking in through one or both of those cables.
> I would like it very much if the band scope had a "real time" mode
> rather than the current arrangement but otherwise I like that also.
> The bottom line is that I love the Jupiter very much and have never
> regretted the decision to order it! It is, as Ten-Tec stated, fun to use as
> well as easy to use without constant reference to the manual. I "still"
> have an Omni VI w/DSP chips and have compared the two. There is not much
> difference in sensitivity that I am able to distinguish. I am not referring
> to lab sensitivity - just perceived signal strength and the ability to
> understand what was being said. I run barefoot and am not terribly
> concerned about the REALLY weak stations anyway.
> Technically the Omni is a better transceiver BUT it is in a box while
> the Jupiter is on the desk! Need I say more?
> I hope that you are enjoying your Jupiter as much as I am enjoying mine!
> (do you have the remote pod? that makes a big difference in ease of
> operation!) 73's; BILL
>
> --
> FAQ on WWW: http://www.contesting.com/FAQ/tentec
> Submissions: tentec@contesting.com
> Administrative requests: tentec-REQUEST@contesting.com
> Problems: owner-tentec@contesting.com
>
> --
> FAQ on WWW: http://www.contesting.com/FAQ/tentec
> Submissions: tentec@contesting.com
> Administrative requests: tentec-REQUEST@contesting.com
> Problems: owner-tentec@contesting.com
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