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Author Topic: A Modded Kent SP-1 Key  (Read 4317 times)
KB5ZCR
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Posts: 2




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« Reply #15 on: October 23, 2017, 09:43:30 PM »

A different way of doing it, even stiffer, with wood!



I'm trying to figure out how this key works and need some help.
OK, I get that the arm pivots at the bearing.
That means that the far end of the bar swings back and forth and touches the left and right contacts, right?
Does the round vertical bar between the ends of the bar move with the end of the bar?
If so, why is it even there?

Also, I see where the contact adjustment screws move the contacts, I get that part, but what do the two adjustment screws nearer the operator do, I assume they adjust something (tension maybe), but I can't see what they actually move anything to adjust.

Can you help to explain how this actually works? I'm confused, but have never seen this key in person.

Thanks, Tim

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AJ8MH
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Posts: 253


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« Reply #16 on: October 26, 2017, 07:34:15 AM »



(AJ8MH)
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W1EUJ
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Posts: 34




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« Reply #17 on: October 26, 2017, 04:13:51 PM »

Now that's a great mod!
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VA7CPC
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Posts: 2805




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« Reply #18 on: November 04, 2017, 03:18:21 PM »

The previous owner of my SP-1 dropped it on the floor, and broke the plastic fingerpiece.

He replaced it with a piece of fiberglass-reinforced epoxy -- otherwise known as "circuit board".   It's pretty stiff.

You can buy carbon-fiber-reinforced insoles for shoes.   A fingerpiece piece cut out of one of those would be quite thin, and quite stiff.  Two pieces glued together would be superb.

.      Charles
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