Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-ma01.r1000.mx.aol.com (Internet Inbound) with ESMTP id B31F8380000C1; Thu, 29 Sep 2011 13:50:22 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1R9KjV-0004Ji-3b for rs_out_1@blacksheep.org; Thu, 29 Sep 2011 18:49:17 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1R9KjU-0004JZ-K3 for rsgb_lf_group@blacksheep.org; Thu, 29 Sep 2011 18:49:16 +0100 Received: from out1.ip04ir2.opaltelecom.net ([62.24.128.240]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1R9KjR-0007vr-Uz for rsgb_lf_group@blacksheep.org; Thu, 29 Sep 2011 18:49:16 +0100 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Ar4AAHGvhE5cHYT4/2dsb2JhbABBmRGOfXiBTgUBAQUIAQEDSQIsAQEDBQIBAxEEAQEKJRQBBBoGFggGEwoBAgIBAYdrBLlFhxMEglSEbp1O X-IronPort-AV: E=Sophos;i="4.68,462,1312153200"; d="scan'208,217";a="347402247" Received: from host-92-29-132-248.as13285.net (HELO xphd97xgq27nyf) ([92.29.132.248]) by out1.ip04ir2.opaltelecom.net with SMTP; 29 Sep 2011 18:49:08 +0100 Message-ID: <006901cc7ed0$1643a110$0401a8c0@xphd97xgq27nyf> From: "mal hamilton" To: References: <002801cc7e08$6e9ec9c0$0401a8c0@xphd97xgq27nyf> <4E839D14.5080105@telus.net> <002f01cc7e84$49295490$0401a8c0@xphd97xgq27nyf> <004901cc7ebd$3d0db910$0401a8c0@xphd97xgq27nyf> <4E849D17.3030607@telus.net> Date: Thu, 29 Sep 2011 17:49:07 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Spam-Score: 0.3 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,MAILTO_TO_SPAM_ADDR=0.276 Subject: Re: LF: Wilkinson combiner Content-Type: multipart/alternative; boundary="----=_NextPart_000_0066_01CC7ED0.1613DE80" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.5 required=5.0 tests=HTML_40_50,HTML_MESSAGE, MAILTO_TO_SPAM_ADDR autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:474820128:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d60094e84afde76b7 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. ------=_NextPart_000_0066_01CC7ED0.1613DE80 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Scott A nice neat job, tidy build . =20 mal ----- Original Message -----=20 From: Scott Tilley=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Thursday, September 29, 2011 4:30 PM Subject: Re: LF: Wilkinson combiner Hi Mal This was the original 2 port design I used to combine two 500W amps. = Works fine. Steve, VE7SL uses this design done as well for his 1KW amp. http://www3.telus.net/sthed/argo/wilk/ A possible benefit is that the combiner elements provide very good low = pass filtering so you may not need a separate filter. Make sure the LO = chain of both amps is shared. This design should be fine for your application and won't need = ferrite. 73 Scott VE7TIL On 9/29/2011 8:34 AM, mal hamilton wrote:=20 Components would need to be hefty to handle two amps each one = several hundred watts to get 1w erp on 137 Maybe the decca approach is better with just a transformer, 3 = primary winding and one output winding, their method handles 1.2 K/watts = without any strain. g3kev ----- Original Message -----=20 From: mal hamilton=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Thursday, September 29, 2011 8:46 AM Subject: Re: LF: Wilkinson combiner Scott Two amplifiers to combine to one output. 2 ports in 1 port out de mal/g3kev ----- Original Message -----=20 From: Scott Tilley=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Wednesday, September 28, 2011 10:17 PM Subject: Re: LF: Wilkinson combiner Hi Mal How many ports? I personally prefer air core coils but iron dust work better = than ferrite for this application. Amidon #3 is the best. Once I know the number of ports I can give you values. Regards, Scott On 9/28/2011 10:59 AM, mal hamilton wrote:=20 LF/MF Is anyone using a wilkinson combiner with LF = amplifiers and if so what are the optimum paramaters for ferrite = cores/windings 73 de mal/g3kev ------=_NextPart_000_0066_01CC7ED0.1613DE80 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Scott
A nice neat job, tidy build
.
 
mal
 
----- Original Message -----
From:=20 Scott = Tilley=20
Sent: Thursday, September 29, = 2011 4:30=20 PM
Subject: Re: LF: Wilkinson = combiner

Hi Mal

This was the original 2 port design I = used to=20 combine two 500W amps.  Works fine.  Steve, VE7SL uses this = design=20 done as well for his 1KW amp.

http://www3.telus.net/sth= ed/argo/wilk/

A=20 possible benefit is that the combiner elements provide very good low = pass=20 filtering so you may not need a separate filter.   Make sure = the LO=20 chain of both amps is shared.

This design should be fine for = your=20 application and won't need ferrite.

73=20 Scott
VE7TIL



On 9/29/2011 8:34 AM, mal hamilton = wrote:=20
Components would need to be hefty to handle = two amps=20 each one several hundred watts to get 1w erp on 137
Maybe the decca approach is better with just = a=20 transformer, 3 primary winding and one output winding, their method = handles=20 1.2 K/watts without any strain.
g3kev
 
----- Original Message ----- =
From:=20 mal hamilton
To: rsgb_lf_group@blacksheep.org
Sent: Thursday, September = 29, 2011=20 8:46 AM
Subject: Re: LF: Wilkinson=20 combiner

Scott
Two amplifiers to combine to one output.=20 2 ports in 1 port out
de mal/g3kev
 
----- Original Message ----- =
From:=20 Scott Tilley
To: rsgb_lf_group@blacksheep.org
Sent: Wednesday, = September 28, 2011=20 10:17 PM
Subject: Re: LF: = Wilkinson=20 combiner

Hi Mal

How many ports?

I personally = prefer=20 air core coils but iron dust work better than ferrite for this=20 application.  Amidon #3 is the best.

Once I know the = number=20 of ports I can give you = values.

Regards,
Scott


On=20 9/28/2011 10:59 AM, mal hamilton wrote:=20
LF/MF    Is anyone = using a=20 wilkinson combiner with LF amplifiers and if so what are the = optimum=20 paramaters for ferrite cores/windings
73 de mal/g3kev
=
 

=
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