So...If I want to use the R-4C, have a bandscope say 72 kc wide...thjat
tunes with the R-4C tuning (tracks), what is a good approach?
I want to use the excellant RX on the R-4C, HW or SW solution would be
OK...but I prefer a HW solution.
Thanks,
73,
Lee, KC9CDT
-----Original Message-----
From: Garey Barrell <k4...@mindspring.com>
To: Curt <cptc...@flash.net>
Cc: drakelist <drakelist@zerobeat.net>
Sent: Thu, Feb 9, 2012 9:45 am
Subject: Re: [Drakelist] pan adapter
Curt -
I guess I'm missing the objective here. I have several SoftRocks,
Ensemble,
etc., and the biggest
'feature' they offer is the ability to see large chunks ( 48, 96 or 192
kHz ) at
a time. If you tap
off in front of the roofing filter, 5.645 MHz 1st IF, all you are
gaining is an
RF stage and
mechanically tuned LO. Your widest 'window' is 20 kHz because of the
PreSelector bandwidth.
It makes sense with one of the modern radios with octave filtering in
the front
end so you CAN see
the entire 48 or 96 kHz capability of the SR. I just can't see the
advantage of
putting a
state-of-the-art, computer controlled receiver BEHIND a mechanically
tuned, 50
year old front end.
I guess I just don't understand the objective unless it's just all the
IF
bandwidths, etc. Seems to
me a much better option is to just go with the Ensemble and get 1- 30
MHz
continuous coverage,
tunable from the PowerSDR or other screen. I can't hear anything on
any of the
Drakes that I can't
hear on the Ensemble, being limited by 'atmospherics' rather than noise
figure.
The Ensemble in it's little QSL sized case just sits there and receives
everything, all under the
computer control. ??????
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
<www.k4oah.com>
Curt wrote:
Hi Carey:
I did exactly that a few years ago with my a version. It works
really well
and is a excellent way
to get involved with SDR, the Software, and get a panadapter along
the way.
You need to get the proper IF version softrock. The SDR needs to be
tapped
off of the 1st IF
before the filtering. The SDR needs to be able to see unfiltered RF
at the IF
frequency.
You need as good a Soundcard as you can afford. The Delta44 is one
of the
ones widely used.
The connection to the main Rx is a bit touchy. I used a gimmick and
a small
cap but that is less
than ideal. Clifton Labs offers a isolator on a small board that is
the real
answer.
The Softrock for the IF will be different. The coils are different
as is the
crystal. Tony Parks
was good about answering questions and providing info. He can
probaly supply
the stuff you need
to convert the 40M kit since I don't think the IF kit currently being
done
includes the Drake IF freq.
Hope this helps
Curt
KU8L
On 2/8/2012 10:34 PM, Carey Lockhart, KC5GTT wrote:
Hello Gang,
i have a 13 tube r4a i would like to set up on powersdr or another
sdr app.
is there a website or
can someone point me in the right direction to what i need to do. i
do have
so 40m softrock and a
flex 1500. either should d the job i would think.
Thanks
Carey, kc5gtt
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