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Author Topic: Spring for Chinese key  (Read 2181 times)
N8TI
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Posts: 115




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« on: January 08, 2012, 08:54:19 AM »

Hello everyone.  I bought one of those Chinese keys and, as you probably know, the springs are too inflexible on those things. I ended up losing the spring or throwing it out, as I can't find it at this point.  Does anyone know where I could get a spring for the thing. My favorite key is the Navy Flameproof, but I wanted to fix up this Chinese one to take to the field. It's only other other use is as a hammer at this point.

Thanks in advance.

Joe N8TI
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WW3QB
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Posts: 696




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« Reply #1 on: January 08, 2012, 11:51:05 AM »

Those keys are nice, but the springs are awful. I replaced it with a generic conical spring. I had to stretch it, but it works well. I got the spring from MT Technologies, but I cannot find it on their web site anymore. Almost any small conical spring can be made to work. Some have cut the original spring.
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KB1LKR
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Posts: 1898




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« Reply #2 on: January 08, 2012, 07:39:43 PM »

try McMaster Carr   http://www.mcmaster.com/
Alternately,
Lee Spring  http://www.leespring.com/
Century Spring   http://www.centuryspring.com/
Barnes Associated Spring   http://www.asbg.com/

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K9ZMD
Member

Posts: 170




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« Reply #3 on: January 08, 2012, 08:46:05 PM »

There's an old thread on the zed showing how a fellow replaced his spring with some earth magnets.  Very cool job, and not too hard to replicate.  He also made the key quieter by gluing a little rubber bumper under the rear adjustment screw.
A miracle (!) I managed to find the thread: http://forums.qrz.com/showthread.php?236151

Gary, K9ZMD/7
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KD6KWZ
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Posts: 276




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« Reply #4 on: January 12, 2012, 12:43:07 AM »

Do you have a Granger supply near you? They have all kinds of things. I've not looked for small springs there, but I'm sure they're in their catalog.
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WQ3T
Member

Posts: 209




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« Reply #5 on: January 15, 2012, 01:25:48 PM »

Those chinese springs are strong enough for car suspension.
A cheap, easy quick spring for weak fists can be found
on a retractible ball point pen refill.
Except for the springs, the chinese keys are very nice to use.
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