[Hammarlund] Just come back again to this maling list

[ehertz]

Fascinating!  What a great project.  Sounds like it will be like the R-391 radio (I think that was the one that had motors).

Wish you the best of luck, let us know how you progress (and make a video on youtube when its done for us to watch!)

Eugene


>-----Original Message-----
>From: Katsuhiko Hirai [mailto:mxc04040 at nifty.ne.jp]
>Sent: Friday, March 2, 2007 06:51 AM
>To: hammarlund at mailman.qth.net
>Subject: [Hammarlund] Just come back again to this maling list
>
>Dear list member, 
> 
>I am a revived person into this list since around 1998. 
>Will you please let me join together again? 
> 
>Recently I got a second RF unit of SP-600 in the auction. 
>The unit has however the tuning shaft without large size knobs. 
>I am looking for a tuning knob for it. 
>Will you let me know if you have a spare one? 
> 
>Now I am planning to construct the motor driven spead dial mechanics 
>that synchronize to the rotation of the tuning shaft, through 
>monitoring the output frequency from the local oscillator of SP-600. 
> 
>Several years ago, I heard that SP-600 designers had made their idea 
>that the spread dial digit had to originally indicate the fixed 
>same cycle digit under any frequecy band like collins receivers. 
>However, the actual receiver did not have been implemented 
>their originals as you know. 
>My dream is to implement their idea by the micro processing technology 
>that monitors the rotation of a knob, calculates the frequency deviation 
>and generates the pulse signal for the stepping motor to drive 
>a tuning shaft of the SP-600 receiver. 
>In order to this controling, the spead dial shaft has to be 
>disconnected from the tuning shaft mechanics of SP-600. 
> 
>Will you please advise me if you have already the similar experience to 
>make accurate digit spreading on the receiver? 
> 
>Best regards, 
>Katsuhiko Hirai 
>Yokohama, Japan 
>exN8EYH, JA3ECA, now JO1GEG 
>-- 
><mxc04040 at nifty.ne.jp> 
> 
> 
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