CW/RTTY/FAX etc.... HardWare/SoftWare !!!

CW/RTTY/FAX etc.... HardWare/SoftWare !!!

Post by Brent Sh » Sat, 18 Feb 1995 01:00:06

|>
|> I'm interested in getting into Rtty/Cw/Fax reception. To start with I D/L
|> Hamcom, Jvfax and Packet Monitor. They suggest making a simple interface
|> using a 741 op amp and some other minor components.
|>
|> 1) Is this Interface available here in the states as a kit?
|>
|> 2) Is this Interface available already built here in the US or elswhere?
|>
|> 3) Any of you out there specifically use this and if so what do you think
|>    of it?
|>
|> 4) Any of you out there use the $400 decoder computer/interface card from
|>    Univeresal Radio and if so, how do you like it and what do you think
|>    of its abilities and or limitations?
|>
|> 5) Any one out there using the external decoders, could you tell us what
|>    model you are using and your experiances/opinions of it?
|>

Brian,

I built the HAMCOMM interface from the plans in the HAMCOMM/JVFAX FAQ.  It
contained a list of parts and a simple schematic.  BTW, I had never built
any electronic type things from scratch in my life, although as a kid I had
one of those electronic kits from RS, so I knew about resistors, capacitors,
diodes, etc.  

The interface seems to work fine.  I use it with a RS DX-390 (a.k.a. Sangean
ATS-818).  I have successfully copied meteorological observations from
Air Force Global Weather Central at Offutt AFB, as well as CW from various
hams.  I have never had success with JVFAX, but my limitation is RFI from the
computer to the radio.  This also causes problems with RTTY on weaker signals.
I could probably solve the problem with shielded cable and RF toroids, but
haven't had the time to play with it in a long time.  

If you are interested in trying out RTTY/FAX/CW reception, I say try building
the little interface.  I found great satisfaction in building something myself
and seeing it work.

Good luck.
===============================================================================
BRENT L. SHAW, Capt, USAF     | Work Phone: (303) 491-8540


Fort Collins, CO 80523        |
===============================================================================

 
 
 

CW/RTTY/FAX etc.... HardWare/SoftWare !!!

Post by Sugerloo » Sun, 19 Feb 1995 13:21:43


Brian,
I've been using an M-1000 for RTTY reception. It's a solid performer in
this mode.
Fax is another story. The M-1000 is a dog for fax reception. The
limitations seem
to be the software that drives the unit. There are better cheaper units
for fax reception.

I also have an AEAFAX2 for fax reception & its superior to the Universal.
There's
modes for automatic collection of Fax. images. The RTTY section of this
unit are inferior to other units. But for $100 it's hard to beat. I don't
think that I'd invest much more for H.F. Fax reception, the resolution is
poor & broadcast are pretty much weather, weather & weather.

So what if I've got 2 Radio decoders in my computer. The computer also has
a modem,  controls my R8 and generates lots of RFI to all of em..

      Dave

 
 
 

CW/RTTY/FAX etc.... HardWare/SoftWare !!!

Post by Brian Bera » Sun, 19 Feb 1995 12:18:06

Quote:>I built the HAMCOMM interface from the plans in the HAMCOMM/JVFAX FAQ.  
It
>contained a list of parts and a simple schematic.  BTW, I had never
built
>any electronic type things from scratch in my life, although as a kid I
had
>one of those electronic kits from RS, so I knew about resistors,
capacitors,
>diodes, etc.  

>The interface seems to work fine.  I use it with a RS DX-390 (a.k.a.
Sangean
>ATS-818).  I have successfully copied meteorological observations from
>Air Force Global Weather Central at Offutt AFB, as well as CW from
various
>hams.  I have never had success with JVFAX, but my limitation is RFI
from the
>computer to the radio.  This also causes problems with RTTY on weaker
signals.
>I could probably solve the problem with shielded cable and RF toroids,
but
>haven't had the time to play with it in a long time.  

>If you are interested in trying out RTTY/FAX/CW reception, I say try
building
>the little interface.  I found great satisfaction in building something
myself
>and seeing it work.

>Good luck.
>========================================================================
=======
>BRENT L. SHAW, Capt, USAF     | Work Phone: (303) 491-8540
>Dept. of Atmospheric Science  |     E-mail:



>Fort Collins, CO 80523        |
>========================================================================

=======
Brent, Thank you Very Much for your response! Several others have replied
to me via Email and I'd like to thank them also for their response!
I'm Very surprised however, to see the lack of responses to this topic! I
sure would of thought that more ppl out there would of responded. Maybe
later, I hope! I'd like to see more input here on this Topic!
Thanks again Brent and BTW I will build this cicuit and play around with
it on my, Drake! Have a good one!--))
Brian