[TenTec] Re: Clicking noise in Jupiter rx audio

[Dudley Hurry]

Have a set of 900 mhz headphones and do not hear anything around the
Jupiter..   But I must turn my GE 900mhz telephone off to get the ticking
out of the phones from that cordless telephone, the Jupiter is clean..

Thanks and 73's,
Dudley
WA5QPZ
jhurry at austin.rr.com




----- Original Message -----
From: "Ken Hopper" <khopper at uchicago.edu>
To: "Dan Collins KZ5X" <KZ5X at ev1.net>; "tentec" <tentec at contesting.com>
Sent: Wednesday, April 17, 2002 8:40 AM
Subject: [TenTec] Re: Clicking noise in Jupiter rx audio


> Yes Dan, I can hear a very rapid and sustained change in the ticking with
I
> rotate any of the knobs on the front of the rig or select the menu.
Especially
> bandwidth, multi, and RF/AF gain and keyer speed. There is a higher
pitched
> whine like an alternator in an old car :-)
>
> Oh well... just one of those things we learn to live with.  Like my old
Sales
> Manager told a client "that's a feature that we added at no charge"
hihihihi
>
> dit dit
> de ken n9vv
>
>
> Dan Collins KZ5X wrote:
> >
> > Thanks Ken.  My symptoms sound very much like what you describe.  I
don't
> > have any wireless stuff near the shack other than a cordless phone, but
his
> > occurs when it is on the hook.
> > Here are a couple of other clues:
> > Noise does stop when I shift the Jupiter into its "menu" mode, so may be
> > related to display circuitry (?).
> > Just realized that it is also correlated to band:  some noise on 10,
some
> > more on 12, lots on 15, little on 20 and lower.
> > Any suggestions appreciated.
> >
> > Dan
> >
> > ----- Original Message -----
> > From: Ken Hopper <khopper at uchicago.edu>
> > To: <KZ5X at mail.ev1.net>; tentec <tentec at contesting.com>
> > Sent: Tuesday, April 16, 2002 18:58
> > Subject: re: Clicking noise in Jupiter rx audio
> >
> > > I disagree those who say the ticking is generated outside the JUPITER.
> > >
> > >      Several months ago I installed a Jensen Linx J120 wireless
headphone
> > > interface. I never heard the clicking in the JUPITER audio chain with
> > speaker
> > > or headphones, but now with the wireless headset I can orient the
900Mhz
> > > xmitter under and around the JUPITER cabinet and the ticking/clicking
is
> > > definitely coming from the JUPITER.  I have used toroids on all the
> > wireless
> > > xmitter lines only limited success. The source seems to flow down the
> > audio
> > > line from the JUPITER.
> > >
> > >      I have an external LDG AT11-MP (because my SWR is different on CW
and
> > SSB
> > > with the INTERNAL tuner) and I have powered it down with NO change in
the
> > > constant (annoying) ticking.
> > >      I do not believe it is the internal tuner, because the ticking
was
> > there
> > > 5 months ago when I got the wireless interface. My Internal tuner is
> > turned
> > > OFF at this time.
> > >
> > >     Solution at N9VV was to move the 900Mhz xmitter far enough away
from
> > the
> > > JUPITER cabinet (2 feet) so that it doesn't pick up the tick.
> > >
> > > dit dit
> > > de ken n9vv
> > > http://www.n9vv.com
> > >
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