[time-nuts] Opera coordinator has resigned

J. Forster jfor at quikus.com
Sat Mar 31 21:44:49 UTC 2012


You can save some bucks by buying a "Little IMP" tubing bender that takes
1/8" OD tubing for about $10 at Home Depot.

1/8" = 0.125" which is very close to 0.141". Two minutes with a rattail
file and Voila.

-John

============




> On 3/31/12 1:46 PM, J. Forster wrote:
>> Remember, there are two varieties of SMA: Those with a gold plated
>> center
>> pin soldered onto the center conductor and those with a sharpened center
>> conductor of 0.141 hard line.
>>
>> The latter are near junk, IMO.
>
>
> Only if you're planning on multiple mates/demates.  The crimp on 0.141
> style works fine for the first couple mates.   Good inspection and
> gaging is needed to make sure you don't get little shreds of copper from
> when you sharpen the point, and that your tooling got the length of the
> "pin" correct.
>
> It's sort of a "works once" scheme (like those head bolts or piston rod
> bolts that you can only torque once.  Once stretched, they can't be used
> again.)
>
> They're pretty handy when building prototypes.  You get your big length
> of 141 and your little bending tool, the die set and crimper from Kings,
> and you can cable up stuff (once) pretty quickly and neatly.
> If you take a cable off, you just throw it away (or cut the connectors
> off and use the remaining cable for something new)
>
> But if you're going to take it apart and reassemble it.. yep.. you want
> the real captured gold plated machined center pin.  I use a lot of the
> semi-flexible or "formable" stuff from Tensolite and RF-Coax these days.
>
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