[amsat-bb] Leo Bodnar ICOM IC-9700 Reference Injection Board

[Bob Hammond]

Thanks for the confirmation.  I am just tickled with the 9700.  Next up is
trying out ECHO (WSJT-X)....

Bob W7OTJ

On Sat, Feb 15, 2020 at 6:57 AM Mark L. Hammond <marklhammond at gmail.com>
wrote:

> Great. Sounds ok, Bob.  Other testing I did-look for harmonics of the
> injected freq!! That was fun and confirming.  Did on all three bands, since
> there were good multiples to listen to on each band.  Zoom in waterfall and
> then turn signal off and on :-)  Get out the calculator....2M is 3x right??
> 49.152x3=147.456.  Keep going....showed me it was spot on all three bands.
>
> Mark N8MH
>
> On Sat, Feb 15, 2020 at 6:33 AM Bob Hammond <propgrinder at gmail.com> wrote:
>
>> Mark, thanks for your description.  I followed it but could not see my 2M
>> "birdy" move at all when enabling/disabling the reference board output!  I
>> would like to assume that my 9700 is just so stable that the reference
>> board is making little difference.
>>
>> I did hear a very slight beat frequency change when I enabled/disabled
>> the reference board output.  What I did was adjust the coarse and fine
>> sliders in the Ref section of the radio until the beat frequency was zero
>> WITH the GPSDO output on.  I could hear a slight beat frequency when I shut
>> it off.
>>
>> Think that's a valid test?  I have yet to repeat all this at 23cm.
>>
>> I was expecting a whopper correction using the GPSDO.
>>
>> 73,
>>
>> Bob W7OTJ
>>
>>
>> On Fri, Feb 14, 2020 at 6:38 AM Mark L. Hammond <marklhammond at gmail.com>
>> wrote:
>>
>>> Hi Bob,
>>>
>>> I have this setup.  It works great--and in fact so well, it's hard to
>>> see!  The "setup" didn't do anything for me unless I ran the numbers WAY
>>> off to one side or another.  Then the radio acted weird--it was effectively
>>> messing up the proper oscillator freq. and sounded warbled.  I've put
>>> coarse and fine in the middle of the recommended ranges and leave them
>>> there...the "tuning" is broad. Don't fret over adjusting uch here...
>>>
>>> How can you see it working?  Here's what I did--use the waterfall to
>>> watch a stable, steady signal (even a "Birdy") on 2M, on SSB.  Zoom in the
>>> waterfall, so it's like +/- 2 kHz.  Now, using the software for the freq.
>>> standard, toggle the reference signal ON and OFF, slowly....you should be
>>> able to see the "birdy" move just a little, back and forth as you toggle
>>> off and on.  With the freq. standard "on", it's in the right calibrated
>>> place.  With it OFF, it's showing you how far off freq. your radio is
>>> without correction.
>>>
>>> Hope that's clear! I spent some time convincing myself it was
>>> working--and did what I tried to explain above.  check it out, let me know
>>> how you make out.
>>>
>>> 73,
>>>
>>> Mark N8MH
>>>
>>> At 06:03 AM 2/14/2020 -0800, Bob Hammond via AMSAT-BB wrote:
>>>
>>> Anyone in the US use this board (along with a GPSDO) in their 9700?
>>>
>>>
>>> http://www.leobodnar.com/shop/index.php?main_page=product_info&products_id=352
>>>
>>> How do you know it's actually working?  I have yet to be able to do their
>>> set up suggestion as described.
>>>
>>> Always learning.....
>>>
>>> Bob W7OTJ
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>>> --
> Mark L. Hammond [N8MH]
>