[Elecraft] 2D Fasteners

[hawley, charles j jr]

I think Wayne’s short 2D fasteners are kind of special. Being just long enough for the joint, they allow an adjustment that I’ve used so many times constructing the K transceivers, etc. to fit the panels and boards just so. Also light weight. 

Chuck
KE9UW Urbana, IL

Sent from my iPhone, cjack 

> On Mar 16, 2018, at 10:54 PM, Wes Stewart <wes_n7ws at triconet.org> wrote:
> 
> Don,
> 
> I've used angle stock on more primitive projects but if you look at the picture(s) you can see that the flat plates are joined with 3/8" square aluminum bar stock.  I used T6 material for its clean drilling and threading properties.  The flat plates are all 6061-T6 material as well.  Everything was laid out on a granite surface plate with the work held vertically and layout lines scribed with a vernier height gauge.  The holes were matched drilled in the plates and bar stock.  The bar stock was threaded (8-32) and the plates drilled for screw clearance .  But because of the precise layout the parts were still interchangeable.
> 
> Everything was power sanded, dipped in a caustic batch to slightly etch the surface, water rinsed, dipped in an acid bath to remove the smut, rinsed again and then given a conversion treatment (Alodine).  All of the lettering was engraved and filled with India ink and a drafting pen.  All of this was SOP on the specialized test equipment we built at Hughes back in the day.
> 
> The only pieces in these two amplifiers that I didn't fab myself were the two clamps for the cold ends of the plate lines on the 8877 amp.  I did do all of the silver plating as well.
> 
> Wes
> 
> 
>>  On 3/16/2018 3:37 PM, Don Wilhelm wrote:
>> Wes,
>> 
>> If you are referring to the aluminum angle stock, I used that back in 1960 when constructing a amplifier.  I did not think I "invented" it, and at that time I did not have a drill press, just a hand drill and a tap, so the holes were not precisely spaced. It worked well, and complied with the TVI problem of that time (put everything in a shielded box).
>> 
>> 73,
>> Don W3FPR
>> 
>>> On 3/16/2018 4:28 PM, Wes Stewart wrote:
>>> Johnny come lately:  I invented them in nineteen seventy something.  And mine really are 3D :-)
>>> 
>>> http://sadxa.org/n7ws/K7CVT_Amp_Input_Compartment.jpg
>>> 
>>> Overall views here: http://sadxa.org/n7ws.html
>>> 
>>> Wes  N7WS ex K7CVT
>>> 
>>> 
>>>> On 3/16/2018 12:36 PM, Wayne Burdick wrote:
>>>> But they *do* allow you to join two enclosure planes while also supporting a PCB or other hardware. That was the intent of the design. (I invented these in 1998 :)
>>>> 
>>>> Wayne
>>>> N6KR
>>>> 
>>>> 
>>>> 
>>> 
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> 
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