Interesting but not applicable to a ham amp.
Antique car parts come closer to the amp. With them they have to appear and
function as original. It doesnt matter if the replacement part is done from
a drawing, laser scanned or a mold taken. Authenticity is determined by
either the marque (Ford Restoration Parts Certified, GM Authorized, etc) or
the national club for any particular make and/or model.
With a modern diode string installed in lieu of an overpriced and failure
prone original part it would be considered an acceptable replacement under
the "work in progress" rule. Unless there is a Henry club out there passing
judgement then it is up to the owner and not a bunch of keyboard activists
that dont even own the product.
BTW, I own a Ford 8N tractor with a Funk V8 conversion kit. Fully acceptable
at any tractor meet.
Carl
KM1H
----- Original Message -----
From: "k7fm" <k7fm@teleport.com>
To: <amps@contesting.com>
Sent: Wednesday, December 26, 2007 10:11 AM
Subject: Re: [Amps] High voltage
> The FAA has an interesting approach to replacement parts in certified
> aircraft, and the same standard could be used for ham gear. The rule is
> that an owner of a certified aircraft may manufacture his (or her) own
> replacement parts, or commission the manufacture of a replacement part, if
> they have the certified drawings for the original part and construct the
> replacement part from those drawings. This applies whether the aircraft
> is
> a Boeing 707 or a Piper Cub. Under their rule, the home constructed part
> becomes a factory original part.
>
> The rule is very specific, and the part cannot be made by cloning the
> original - you must make it from the drawings. A friend of mine owns a
> 1940
> Funk airplane. He is a certified mechanic and needed a replacement strut.
> The strut was simply made from tubing, but he could not look at it and
> simply make a good or better replacement. He had to find a source for the
> plans for that particular strut (at a pretty hefty price for a piece of
> paper), then manufacture his part from that blueprint. He then certified
> that it was made according to the original specifications. Presto, it
> became an original part.
>
> 73, Colin K7FM
>
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>
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