Take a look at the Henry amplifiers....That is the method that they use for
There are lots of good pictures on W7RF's site of the interior of Henry
Sounds like a fun project.
----- Original Message -----
From: "Bill Turner" <firstname.lastname@example.org>
To: "Radio WC6W" <email@example.com>
Sent: Wednesday, September 05, 2001 4:04 PM
Subject: Re: [AMPS] Bandswitch ramblings...
> On Wed, 5 Sep 2001 13:55:19 -0700, Radio WC6W wrote:
> > My solution of the moment is to make a scaled up version of the cam &
> >leaf arrangement used by Tektronix in some of their test equipment of the
> >1970-80's. If you haven't seen the insides of one of those, it
> >resembles a music box mechanism. And if you haven't seen the insides of
> >a music box, I'm out of analogies.
> > Has anybody ever seen like this in an amplifier? Thoughts?
> >Suggestions?? ... Criticisms??? :-)
> I was a production test technician on the 464/465/466 lines in Beaverton
> in the late '70s and early '80s. You are bringing back some memories!
> I remember the switches well.
> I'd say go for it. There were two things I liked about that switch
> 1. The dual fingers were floating; essentially no lead inductance was
> added by the switch itself.
> 2. They had a wiping action which helped keep the contact surface
> Mechanically, I'd say you have your work cut out for you, but when you
> get it going, it should be quite satisfactory.
> And tnx for spelling Tektronix correctly! :-)
> 73, Bill W7TI
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