[Hammarlund] Old Hammarlunds

[Kenneth G. Gordon]

On 12 Apr 2011 at 20:17, Carl wrote:

> > The Hammarlund crystal filter is, IMHO, the very best of the
> > bunch....when it and the receiver have been properly aligned.
> >
> > MUCH better than National's.
> 
> Until they improved it later but then switched almost entirely to low
> IF LC filters and then jumped again to high IF multipole crystal
> filters. Never a dull moment at that place!

Must have been fun, at times...also stressful.

Ken W7EKB