RCU Forums - View Single Post - Kraft '74 Single Stick Radio - Rebuild Thread
Old 03-04-2011 | 09:47 PM
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doxilia
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Default RE: Kraft '74 Single Stick Radio - Rebuild Thread

Sounds good John. Single stick conversions are quite unique since they are few and far between. The MS2K is also a gold nugget of RC tech - especially when one considers that it was started over 10 years ago!

I should have added in the post above that the 7C and Phil Kraft Signature Series Tx's made use of excellent Spectrol pots on the three main axes. These can be seen in the photos above. They are of the 5K ohm 1/4" shaft type. The throttle stick uses a lower quality inexpensive pot of the same type used on the Aux channels 6 & 7. Lower quality smaller pots are also used on the vertical axis trim controls (throttle/elevator) while the horizontal axes of the gimbals have the trims engaging the master Spectrol pot itself - a nicer more precise arrangement I suspect. I'm not sure actually why Kraft didn't just use 4 good Spectrol pots for stick and trim and dispense with the vertical axis trim pots. It would have required a little stick re-design but I believe that this is just what Proline did. I might be wrong and they also used 3 pots per 2-axis stick assembly.

In any case, this 30 year old Tx has very smooth feeling sticks so I'm hopeful that the results when converted will have been worth while. This is all a very educational experience for me since I haven't played with the innards of radios for over 30 years!

David.