[TenTec] Paragon on RTTY

[Vic Klein]

Thanks for the reply, Bob. I don't think it is a problem with the shift. My
receive technique is usually to tune until the mark or space moves off the
LED indicators on the KAM, note the frequencies, and split the difference. I
can run the 250 Hz filter in the Paragon and basically eliminate anyone off
frequency and get a great copy with everything set for 170Hz shift. It is
just that the frequency I receive the other station on is about 200Hz above
where I thought I was transmitting. is that 200Hz correct or should I try
170Hz? I don't know.

Interestingly, Stan at Ten Tec was reading the list and also replied moments
ago. He said that the Paragon can not receive true FSK and that using the
offset is a requirement. The stations I was working reported my frequency to
be exactly what I showed as a transmit frequency, if they could tell at all,
but I had to shift my rx up to get them. At first I thought it was just that
the person I was working was using AFSK and, in fact, had only a general
idea of where he was transmitting, but after 3 in a row....

I understand setting the specific frequencies as per the manual you mention,
but by listening to the WWV tone (from 440 to 600 Hz depending on the
minute) and adjusting the BFO's to not "shift" the tone when switching modes
at least gets the relative offsets correctly set, I believe. This is a
technique I have used on different radios over the years and it seems to
work very well. It seems the Paragon just doesn't supply the appropriate
offset in RTTY and uses LSB receive. I suppose I could adjust the RTTY
transmit offsets (C4 & C6) so that stations zero beating me would show up
where I "think" I am transmitting, but I would certainly want a freq counter
for that. Besides, others are already reporting my signal to be exactly
where I indicate I am transmitting. I suppose the easiest thing is to just
keep dialing in the +200 hz offset on receive when I run RTTY.

=Vic=
WA4THR

> -----Original Message-----
> From: Robert & Linda McGraw K4TAX [mailto:RMcGraw at Blomand.Net]
> Sent: Friday, November 04, 2005 10:41 AM
> To: Discussion of Ten-Tec Equipment
> Cc: vhklein at ptd.net
> Subject: Re: [TenTec] Paragon on RTTY
>
>
> To enable the FSK mode, press SHIFT and then CW.  All mode
> indicators will
> be out.  This provides 170 Hz shift with 2125/2295 Hz tones.  I wonder if
> the stations you are having trouble receiving are using AFSK with
> a shift of
> 200 Hz?  Some do.
>
> There is a specific alignment for RTTY transmit.  It does require an
> accurate frequency counter capable of measuring to 1 Hz or
> better.  Measure
> the frequency at connector 46.   The complete procedure is found on page
> 6-65 of the manual I have.
>
> RTTY (shift CW) transmit with mark/space low, adjust C6 for 9.000875 MHz.
> RTTY transmit, with mark/space high, adjust C10 for  9.000705 MHz.
> RTTY receive or LSB, adjust C4 for 9.003000 MHz.
> USB, adjust C7 for 9.000000 MHz.
> CW transmit or TUNE, adjust C9 for 9.000700 MHz.
>
> There may be some slight interaction between the adjustments thus
> I suggest
> going over the sequence 3 or 4 times.  Also, they >MUST< be done in the
> specific order as outlined above.
>
> Although you can switch modes between AM, USB, LSB and CW while
> monitoring
> WWV that does not indicate that the BFO's are correct.
>
> Hope this helps.
>
> 73
> Bob, K4TAX
>
>
> ----- Original Message -----
> From: "Vic Klein" <vhklein at ptd.net>
> To: <tentec at contesting.com>
> Sent: Friday, November 04, 2005 8:39 AM
> Subject: [TenTec] Paragon on RTTY
>
>
> > I have a very nice 585 Paragon that I recently decided to run some RTTY
> > with. I am connecting with a Kantronics KAM to the Mark/Space
> jack on the
> > rear panel to run "true" FSK, and selecting RTTY (shift-CW) as the mode.
> > Everything is working well except I seem to need to offset the receive
> > +200
> > Hz in order to receive stations I am working. This happened with 3
> > stations
> > in a row and, even though they were all using AFSK (sound card output to
> > their mic jacks), I believe I may have some problem here. I should note
> > that
> > my Paragon is dead on frequency receiving USB and LSB. I can
> switch from
> > AM
> > to either sideband with no change in tone listening to WWV, for
> example,
> > and
> > never get a report that I am off frequency otherwise.
> >
> > I looked to the need to perhaps adjust the RTTY BFO, but I see that C4
> > also
> > adjusts LSB receive, which is doing fine. Am I missing
> something here? Is
> > it
> > just a factor of working "true" FSK vs. AFSK? Thanks.
> >
> > =Vic=
> > WA4THR
> >
> > _______________________________________________
> > TenTec mailing list
> > TenTec at contesting.com
> > http://lists.contesting.com/mailman/listinfo/tentec
> >
>
>
>