Re(2): [Antennas] Antenna-Related Patents

Wed Oct 15 14:26:03 EDT 2008

Hi Rick,
Here is an example. The big binocular cores are plainly visible.
http://www.ab4oj.com/quadra/main.html
Cheers for now, 73,
Adam VA7OJ/AB4OJ
-----Original Message-----
From: antennas-bounces at mailman.qth.net
[mailto:antennas-bounces at mailman.qth.net] On Behalf Of Rick Karlquist
Sent: 15-Oct-08 10:22
To: DavidE Benedict
Cc: ; 
Subject: Re: Re(2): [Antennas] Antenna-Related Patents
DavidE Benedict wrote:
> I may be misssing soemthing here, but fairly large binocular cores are 
> widely used in high power transistor RF amps ...for coupling, 
> push-pull transformers, paralleling amplifier stages, and in matching 
> transistor outputs to whatever. 250 watt cores are not uncommon.
>> David
> W7DBH

Can you give us a specific example, with manufacturer's part number? Side
by side stacks of toroids are not "binocular" cores as defined in the patent
(top and bottom surfaces and a rib).
Rick N6RK