This is a GREAT thread. Very interesting.
Lane
Ku7i
>From: "WA3FIY" <wa3fiy@radioadv.com>
>Reply-To: WA3FIY@radioadv.com
>To: mike bryce <prosolar@sssnet.com>, <TenTec@contesting.com>
>Subject: Re: [TenTec] argonaut V hidden talent not good
To: <tentec@contesting.com>
>Date: Sat, 26 Oct 2002 11:58:04 -0400
>
>Hmmmm..........? is right. I listen to 30m on my Argonaut V
>almost every evening here in NW Pa and have not heard what you
>are hearing. I realize propagation and antenna pattern could be
>different but so far no funny stuff happening here.
>
>Your observation is even more puzzling in that the front end of
>the Argonaut V and the Jupiter are almost identical up through
>the roofing filter. And since anything outside the bandwidth of
>the roofing filter never gets it to the following IF stages, any
>differences in the IF stages should not cause the kind of
>problem you are seeing.
>
>If front end distortion products were the problem, inserting the
>attenuator should make a very significant difference. As I
>recall, 20 db of attenuation should reduce third order products
>60 db and fifth order products 100 db or thereabouts.
>Somebody jump in here if I'm not remembering this correctly.
>
>Since the attenuator follows the transmit low pass filters [one
>of the differences between the Argonaut and the Jupiter] there
>could be a problem in the transmit filter for 30 meters, or there
>could be a problem external to the radio.
>
>I will listen more carefully today and tonite around 10.120 to see
>if I can find any trace of what you are hearing.
>
>Please keep us posted Mike on what you find.
>
> >From my still limited experience, the Argonaut is a nice rig. I
>believe it has a little more IF gain than the Jupiter and Pegasus
>and therefore is not quite as quiet. On the other hand, anything
>I can hear on one of the rigs, I can hear on the other two. I like
>quiet and some dynamic range in the signals so I run the
>attenuator most of the time on the Argonaut. I only turn it off
>on 12 and 10 meters.
>
>I do miss the RF gain control though. That is usually my most
>used control on other rigs.
>
>-73-
>
>-Lee-
>
>On 25 Oct 2002 at 21:45, mike bryce wrote:
>
> > I like 30 meters cw and I like to shortwave listen. but not at the
> > same time.
> >
> > on 10.120 +/- I can hear all kinds of shortwave broadcasts, all at the
> > same time, with a sprinkle of CW from 30 meters thrown in for good
> > measure.
> >
> > can't hear the shortwave stations on the jupiter on the same antenna
> > on the same frequency in a A/B comparison
> >
> > atten helps some but does not take out the broadcast completely.
> >
> >
> > yup! made sure the noise blanker was off... those things can cause all
> > kinds of critters to appear.
> >
> > hummm....
> >
> >
> >
> > Mike Bryce WB8VGE
> > SunLight Energy Systems
> >
> > http://www.seslogic.com
> > http://www.theheathkitshop.com
> >
> > "Electricity at the speed of light"
> > _______________________________________________
> > TenTec mailing list
> > TenTec@contesting.com
> > http://lists.contesting.com/mailman/listinfo/tentec
> >
>
>
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