[R-390] Gear clamps

[Bob kb8tq]

Hi

If you have a buddy with a small CNC setup, they are the size item that makes
a fun project. There’s a lot of stuff that a little desktop just can’t do, but this is 
one of the things it can.

Bob


On Oct 12, 2017, at 10:24 AM, Barry <n4buq at knology.net> wrote:
> 
> If you have a drill press, it's not too terribly difficult to make a two-piece clamp similar to that but out of flat aluminum stock of sufficient thickness.  Two pieces drilled and tapped correctly and then clamped together with a small spacer (using the screws you'd use to clamp it to the gear), then drilled (and reamed if you have the right reamer) to the correct size works fine.  I had an R390A with such a clamp (I didn't make it but it didn't look that hard to make).
> 
> Thanks,
> Barry - N4BUQ
> 
> ----- Original Message -----
>> From: "Stan Gammons" <s_gammons at charter.net>
>> To: r-390 at mailman.qth.net
>> Sent: Thursday, October 12, 2017 8:55:58 AM
>> Subject: Re: [R-390] Gear clamps
>> 
>> A list member contacted me off list to say he used a split clamp from
>> Fastenal for the gear clamp.  I'm not 100 percent certain, but I believe
>> this is what he was referring to. No, it's not original, but it looks like
>> it will work if one drills the hole to the correct diameter.
>> 
>> https://www.fastenal.com/products/details/4142507?term=Sp-4-a
>> 
>> 
>> 73
>> 
>> Stan
>> KM4HQE
>> 
>> 
>> On October 10, 2017 7:14:13 PM CDT, Stan Gammons <s_gammons at charter.net>
>> wrote:
>>> Hi Everyone,
>>> 
>>> I have all of the paper caps swapped in the R-390A I'm working on. Now
>>> I've started working on the RF deck. I knew it had 1 broken gear clamp
>>> before I started. After I started tearing the gear train apart to
>>> replace the clamp, I found another broken clamp.  Does anyone have any
>>> of the larger size, approx 25/64" diameter hole, clamps you would be
>>> willing to sell?  I need at least 2 clamps.
>>> 
>>> Thanks
>>> 
>>> 
>>> 73
>>> 
>>> Stan
>>> KM4HQE
>>> 
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