Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-db06.r1000.mx.aol.com (Internet Inbound) with ESMTP id BC32038000108; Thu, 29 Sep 2011 12:32:06 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1R9JV7-00044X-8Z for rs_out_1@blacksheep.org; Thu, 29 Sep 2011 17:30:21 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1R9JV6-00044O-9r for rsgb_lf_group@blacksheep.org; Thu, 29 Sep 2011 17:30:20 +0100 Received: from outbound04.telus.net ([199.185.220.223] helo=defout.telus.net) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1R9JV4-0007Ru-Vf for rsgb_lf_group@blacksheep.org; Thu, 29 Sep 2011 17:30:20 +0100 Received: from edtncm04 ([199.185.220.240]) by priv-edtnes24.telusplanet.net (InterMail vM.8.01.03.00 201-2260-125-20100507) with ESMTP id <20110929163016.NPBP8467.priv-edtnes24.telusplanet.net@edtncm04> for ; Thu, 29 Sep 2011 10:30:16 -0600 Received: from [192.168.1.102] ([75.157.171.5]) by edtncm04 with bizsmtp id egWF1h02107LRq301gWF3F; Thu, 29 Sep 2011 10:30:16 -0600 X-Authority-Analysis: v=1.1 cv=8tbg/SJUuV2FCSmRdrXJtO3KtiIvYWS+0nvZokcuJmE= c=1 sm=2 a=342EsJ9rKw4A:10 a=LGgl8L9ij00A:10 a=aatUQebYAAAA:8 a=nN7BH9HXAAAA:8 a=F3M5lZpKAAAA:8 a=VdZqYnAZv4Z1aN-_-8UA:9 a=wPNLvfGTeEIA:10 a=muIvw5a9-cgA:10 a=wk6s2zzMB60A:10 a=rBKJJ2Jc0C4A:10 a=z9pUO28cZLGLxVNr:21 a=WCg79JXTdjxRF5eY:21 a=BVOIYpLZv9LzhLMNwjAA:9 a=Fz31QZXK47N7l69MV7oA:7 a=ZNQXoyLNVO5ReTTu:21 a=fGrR26kRWllo3ywx:21 X-Telus-Outbound-IP: 75.157.171.5 Message-ID: <4E849D17.3030607@telus.net> Date: Thu, 29 Sep 2011 09:30:15 -0700 From: Scott Tilley User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:6.0.2) Gecko/20110902 Thunderbird/6.0.2 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <002801cc7e08$6e9ec9c0$0401a8c0@xphd97xgq27nyf> <4E839D14.5080105@telus.net> <002f01cc7e84$49295490$0401a8c0@xphd97xgq27nyf> <004901cc7ebd$3d0db910$0401a8c0@xphd97xgq27nyf> In-Reply-To: <004901cc7ebd$3d0db910$0401a8c0@xphd97xgq27nyf> X-Spam-Score: 1.7 (+) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,MAILTO_TO_SPAM_ADDR=0.276,RATWARE_GECKO_BUILD=1.426 Subject: Re: LF: Wilkinson combiner Content-Type: multipart/alternative; boundary="------------040907040404080708020300" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.7 required=5.0 tests=FROM_ENDS_IN_NUMS,HTML_30_40, 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: 0:2:456947360:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d405a4e849d862ccc X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. --------------040907040404080708020300 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit 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: > 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 ----- > *From:* mal hamilton > *To:* rsgb_lf_group@blacksheep.org > > *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 ----- > *From:* Scott Tilley > *To:* rsgb_lf_group@blacksheep.org > > *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: >> 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 > --------------040907040404080708020300 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit 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:
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 -----
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 -----
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:
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
 


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