[R-390] I search of a spring for a R-390a split gear

[Roy Morgan]

At 06:33 AM 10/26/2005, Thomas Guest wrote:
>Hi everyone,
>
>I am looking to see if anyone would have a extra spring for a split
>gear in your junk box.


Tom and others,

Go to your local hobby store (airplanes, trains and the like, not the craft 
store with knitting, paints and so on.) Bring your vernier calipers and the 
information below.

>Date: Mon, 29 Aug 2005 09:36:54 -0400
>From: "Tim  Shoppa" <tshoppa at wmata.com>
>To: <r-390 at mailman.qth.net>
>Subject: Re: [R-390] Oldham and other springs
>
>By my measurement the Oldham coupler springs are 1/8" diameter,
>0.016" diameter wire, and about 0.65" or 0.75" long unextended
>between hooks.
>
>The springs used for the split gears are 1/8" diameter, 0.016"
>diameter wire, and about 3/8" long between hooks unextended.
>
>The springs used to pull down the slug racks are 3/16" diameter,
>0.020" diameter wire, and about one and a half inches long between
>hooks unextended.
>
>These are all fairly vanilla springs, with the exception for the split
>gear springs which are a bit shorter than you'll find in standard
>packages.
>
>It is fairly easy to wind your own springs or take a long spring and
>make it shorter.  See for example
>
>   http://home.earthlink.net/~bazillion/intro.html
>
>I think the original R-390A springs must've been stainless if you want
>to be really picky.
>
>Tim.


If that does not work,
 From my saved emails:

>I have been able to find many of the precision mechanical components needed
>for R-309A repair at Winfred M. Berg, Inc. 499 Ocean Avenue, East Rockaway,
>NY 11518 Tel: 1-800-232-BERG, Fax: 1-800-455-BERG website---www.wmberg.com.
>They have a lot of hardware including gear collars, oldham coupler springs,
>snap rings (but no 8-36 spline headed set screws that I could find). They
>are nice to deal with, and I have used them for years.
>
>Miles Anderson, K2CBY
>16 Round Pond Lane
>Sag Harbor, NY 11963
>k2cby at aol.com


Roy

- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
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