[Elecraft] Wood bits

[AJSOENKE at aol.com]

In a previous post I stated that I had a set of bits that were designed  
specifically for this purpose.
I dug the kit out of my PCB toolkit and have  the following information. 
Note: The reference to the company that made the  kit  yielded only one reference 
on Google and a post on kkn.net archives  which are password protected. It 
seems assured that the company no longer  exists:

A. F. Stahler Co.
PO Box 354 
Cupertino, CA 95014
(408)  252-4219

4 part kit consists of 4 plastic vials.

1) Part Number  156915 - a single "drill mill" shank dia. .200, mill end dia. 
.150, concentric  drill dia. .028

2) Part Number 156910 - a single "drill mill" shank dia.  .200, mill end dia. 
.108, concentric drill dia. .028
 
3) Part Number 156920 - a single "drill mill" shank dia. .200, mill end  dia. 
.200, concentric drill dia. .028
 
4) No PN contains 3 spare diamond drills .028 dia. and about a  dozen nylon 
hex head screws, abt #4 x 1/8" long
  The purpose of the nylon screws is to drill into a PCB and insert  then 
dril thru hole in nylon to create an insulated standoff or feedthru.
 
My recollection was that  A F Stahler was or may have been a ham who  did a 
lot of building and back in 1970s he provided the tools as a method of  
breadboarding. He may also have been an antenna designer with many patented  designs.
 
This may be more significant: one of the items I found in my toolkit  was a 
similar device that is/was made by VECTOR. As may be recalled they  
manufactured a breadboard system that employed vector board which had a grid of  holes 
where you  could push in a small metal clip that was sometimes  referred to as a 
"flea clip". it had a couple small holes in it and could also  daisy chain 
buss wire and component leads in a serrated slit on top. Spreading  the slit 
slightly secured it in the vectorboard. It was solderable, but a  circuit could 
be created by purely mechanical pressure fit. They advanced to the  aid of PCB 
breadboarding later and supplied what I have is a VECTOR P-138  bit.
 
_http://www.vectorelect.com/Catpdf/Page%2071.pdf_ 
(http://www.vectorelect.com/Catpdf/Page%2071.pdf) 
 
If you drilled a hole in a blank copperclad board there is a pilot pin on  
the bit that would go in the hole and by turning bit in a small drill it cuts a  
"doughnut" shaped pattern on board.
 
The URL shows an array of tools - also check out the home page for a vast  
array of prototyping tools and materials. Sold by Mouser and others  
_http://www.vectorelect.com/_ (http://www.vectorelect.com/) 
 
Good Luck,  AL WA6VNN



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