[Elecraft] Up-conversion.

[Geoffrey Mackenzie-Kennedy]

N2EY at aol.com wrote on Sunday, August 13, 2006 at 5:32 PM


> By contrast, IIRC, RCA made some mechanical filters for receivers they
> provided to the military in the 1950s. From what I read, they were just 
> different
> enough from Collins design that they avoided patent infringement. They 
> were also
> (allegedly) quite fragile.


The alleged fragility of the RCA mechanical filters might well have been a 
story put out by the competition. I was involved at that time in the design 
of the 100w variant of RCA's SSB-1 which used RCA's mechanical filters, as 
did at least one of RCA's higher powered ISB rigs. I cannot recall any 
feedback from the field related to the filters.

73,
Geoff
GM4ESD