Steve,
When my power supply was right next to my pegasus, received CW
signals sounded very raspy. I was ready to send the unit back to TT. I
moved the supply and all was well. The same raspy sound was on the
transmitted
signal. I think we are talking about two different problems. When the
supply
is too close to the pegasus, you get a very bad raspy sound on both transmit
and receive. When the power supply is not next to the pegasus, there is a
barely noticeable phase noise problem. Most normal people don't even hear
it.
Carl Moreschi N4PY
919-494-2363
Franklinton, North Carolina
n4py@earthlink.net
----- Original Message -----
From: "Steve Ellington" <n4lq@iglou.com>
To: "Carl Moreschi" <n4py@earthlink.net>; "tentec" <tentec@contesting.com>
Sent: Sunday, March 04, 2001 5:20 PM
Subject: Re: [TenTec] Jupiter & Pegasus CW note
> Power supplies have nothing to do with this problem Carl. It's the noisy
> 70mhz first oscillator. This has been proven many times over although
power
> supplies can cause other problems with RF feedback etc.
>
> Steve Ellington
> N4LQ
> -----Original Message-----
> From: Carl Moreschi <n4py@earthlink.net>
> To: tentec <tentec@contesting.com>
To: <tentec@contesting.com>
> Date: Sunday, March 04, 2001 12:03 PM
> Subject: Re: [TenTec] Jupiter & Pegasus CW note
>
>
> >
> >I just have to say that it is a known problem that if the pegasus or
> jupiter
> >is too close to the power supply, a 60 hertz component gets modulated on
> >the CW carrier producing a raspy CW note. You must keep the power
> >supply at least 2 feet from the transceiver. The problem is not RF
getting
> >into the transceiver, it is caused by the magnetic lines of force from
the
> >power
> >supply transformer modulating the oscillators in the transceiver.
> >
> >I have had several hams listen to my pegasus CW note and all say it
> >sounds great.
> >
> >I wonder if the ARRL test had the power supply near the pegasus.
> >
> >Carl Moreschi N4PY
> >Franklinton, North Carolina
> >n4py@earthlink.net
> >----- Original Message -----
> >From: "David McClafferty" <at060@chebucto.ns.ca>
> >To: "Paul Christensen" <paulc@mediaone.net>
> >Cc: "Tentec Users Reflector" <tentec@contesting.com>
> >Sent: Sunday, March 04, 2001 4:53 PM
> >Subject: Re: [TenTec] Jupiter & Pegasus CW note
> >
> >
> >>
> >>
> >>
> >> On Sat, 3 Mar 2001, Paul Christensen wrote:
> >>
> >> >
> >> > It's unlikely you'll see anything abnormal with an audio spectrum
> >analyzer.
> >> >
> >> Sorry I should have said I was using an RF spectrum analyzer. It is a
> >> homebrew analyzer that was described in QST some years back. I built it
> up
> >> from an A&A Engineering kit. BTW it is for sale along with a Tektronix
> 902
> >> diplay unit (scope). A spare scope tube, two spare Jerrold TV
converters
> >> (used in the Spec. Analyzer) for $400.00 Canadian, if anyone is
> >> interested.
> >>
> >> 73, Dave. VE1ADH
> >>
> >>
> >>
> >> --
> >> 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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