[1000mp] Band scope information follow-up

[Tod Olson]

I have followed up on Ron Long¹s very welcome URL suggestions.

At this time I am of the opinion that I will be using the Clifton
Laboratories Z10000B-U buffer amplifier installed as it is shown in the
very nice write up on how to do the tap avoiding the limiting effect of a
roofing filter and also avoiding de-tuning the very excellent dual
balanced mixers which are so good in the FT1000MP.The installation looks
to be a trifle tricky because there is no good way to mount the buffer amp
near the RF board. [At least that was the opinion of Jack, the owner of
Clifton Labs.] The Clifton Lab method will take the signal off at 70.45
Mhz at a point where the mixer transformers are link coupled from one
stage to the next. I suggest that interested parties check all three of
Ron¹s suggested URLs to get an idea of what our options might be.  I have
listed them at the end of this message. The order reflects my opinion of
the utility of the three URL¹s.

Remember, my plan is to use a USB TV dongle which has had special, free ,
software developed by hams to provide all of the tuning that usually is
done with SDR radio kits. The price of the dongle delivered is less than
$20 and it tunes from 25-1000 Mhz. The display is the computer monitor.
Early testing with a IC706MII shows that the bandscope display can run in
parallel with other programs running on the computer without problems. The
software allows one to select a frequency on the display or tune the radio
and have the center of the display follow the radio VFO. The dongle is,
however, an 8 bit device which probably limits the SNR to about 45 dB.
That is the same as is found in a lot of other radios with built-in band
scopes. For a substantial increase in cost you can get 12 bit dongles
which will have better resolution.

I want to publicly thank Ron again for sending along these URL¹s. They
saved me a lot of time and prevented me from needing to reinvent things
that had already been successfully created.

Once I have successfully done the installation and testing I will generate
a write-up that I can post on my website. I will try to get as many
pictures as possible since that often is the best way to make sense out of
the text.

Tod, K0TO

 http://www.cliftonlaboratories.com/z10000-u_buffer_amp_and_ft-1000mp.htm
 http://www.dh1tw.de/bandscope-modification-yaesu-ft1000m

 http://www.pensioneitaliacapri.com/ham/pan.adapter/la-braciola.htm




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