[R-390] Filters

[Bob Camp]

Hi

Just to be clear:

The wires that are welded to the edges of the disks are acoustic coupling wires rather than magnetic coupling wires. The only only magnetic coupling is between the driver coils on the end and the driver that connects to the end disk. The basic operating mode of the filters is acoustic rather than magnetic.

Bob

On Feb 16, 2013, at 5:48 PM, k2cby <k2cby at optonline.net> wrote:

> I took a hard look at the photos, and it seems to me that all of the
> magnetic coupling wires are in place.
> 
> 
> 
> While there are fine wires in the coils, the coupling wires that everyone
> seems to be referring to are on the perimeter of the filter discs and appear
> to be at lease 0.5 mm (the lead in a mechanical pencil)  or about #20 awg.
> 
> 
> 
> Whatever is described as a "hair thin wire" has to have come from the coils,
> not the resonators, unless is just an artifact that crept in from the bench
> during manufacture.
> 
> 
> 
> Miles B. Anderson, K2CBY
> 16 Round Pond Lane
> Sag Harbor, NY 11963
> Tel.: (631) 725-4400
> 
> Fax.: (631) 725-2223
> e-mail: k2cby at optonline.net 
> 
> 
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