sb-102 vs KWM-2

[Stewart Lyon]

On Tue, 18 Apr 2000 17:41:13 -0400 David Rogovitz <drogovitz at HOME.COM>
writes:
> Hi Guys,
>        I got into a debate with one of my Collins buddies and he
> claims the Heath SB-102 was lifted from the collins KWM-2 design. Is
there
> any truth to this statement? I know a lot of behind the scenes copying
> goes on in this business.
> 73 de David


All one has to do is compare the two designs to know that is not true.
The SB-100 may have been inspired by the KWM-2 ( see Chuck Penson's book)
but about the only things they have in common are : size, double
conversion, & 6146 finals. Collins used 455kc mechanical filters, Heath
used 3395kc crystal filters; Collins used inductive tuning, Heath used
capacitive tuning. etc, etc.
Heath was using 6146s in their first designs (DX35,DX100, etc). Maybe
Collins copied Heath. Whoops.

73, Stu W6CUX (/AE, at last)

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