From: Chris Wilson <dead.fets@gmail.com>
Date: Mon, 10 Apr 2017 11:47:29 +0100
Message-ID: <1316557940.20170410114729@gmail.com>
To: Markus Vester <rsgb_lf_group@blacksheep.org>
In-Reply-To: <15b4f9773b2-2fd8-bf55@webprd-a08.mail.aol.com>
References: <1294128911.20170408174233@gmail.com> <15b4f9773b2-2fd8-bf55@webprd-a08.mail.aol.com>
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Subject: Re: LF: Wilkinson combiners
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Hello Clemens, Markus, Alan, Graham and all who replied re my combiner questions,

Some  great  and  patiently  presented  info  here, thanks a bunch for
explaining  it  so  well  and in such detail. I now have a much better
grasp  of how the wide and narrow band ones work and why a narrow band
combiner  might work best with pre filtered outputs sent to its input.
I  will  build  the W1VD design as I already have ferrites to do this,
before  buying  hard  to get (in the UK) and costly big iron cores for
building  a second W1VD LPF bank. If the W1VD combiner is not suitable
I  may  well buy 3 more iron cores and build a second LPF. I will also
try  some low inductance resistors instead of the wire wounds, and look
at  the wire wounds with my AIM analyzer. Thanks agin everyone. Off to
mow the lawn or I won't get a lift to and from the pub tonight ;)


> Hi Chris,

> either method should work: two separate T-type lowpass filters
> after each PA will reflect the harmonics before they reach the
> narrowband combiner. Or build Jay's broadband combiner, which will
> pass on the harmonics to the T-lowpass instead of shunting them to ground.

> Best 73,
> Markus (DF6NM)


-- 
Best regards,
 Chris                            mailto:dead_fets@gmail.com