Return-Path: Received: from mtain-dj10.r1000.mx.aol.com (mtain-dj10.r1000.mail.aol.com [172.19.187.146]) by air-me09.mail.aol.com (v129.4) with ESMTP id MAILINME092-8bc14cd624a7f9; Sun, 07 Nov 2010 00:01:43 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dj10.r1000.mx.aol.com (Internet Inbound) with ESMTP id 1635A3800008E; Sun, 7 Nov 2010 00:01:41 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PEwPu-0007Gr-SW for rs_out_1@blacksheep.org; Sun, 07 Nov 2010 03:59:42 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PEwPu-0007Gi-6g for rsgb_lf_group@blacksheep.org; Sun, 07 Nov 2010 03:59:42 +0000 Received: from qmta01.westchester.pa.mail.comcast.net ([76.96.62.16]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PEwPs-0004Oo-9R for rsgb_lf_group@blacksheep.org; Sun, 07 Nov 2010 03:59:42 +0000 Received: from omta17.westchester.pa.mail.comcast.net ([76.96.62.89]) by qmta01.westchester.pa.mail.comcast.net with comcast id U3ww1f0021vXlb8513zZVk; Sun, 07 Nov 2010 03:59:33 +0000 Received: from JAYDELL ([76.23.233.102]) by omta17.westchester.pa.mail.comcast.net with comcast id U3zZ1f0032DDHkk3d3zZiQ; Sun, 07 Nov 2010 03:59:33 +0000 Message-ID: <000d01cb7e30$2f5041f0$8d01a8c0@JAYDELL> From: To: References: <000c01cb7da9$23b1a1e0$8d01a8c0@JAYDELL> Date: Sat, 6 Nov 2010 23:59:32 -0400 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Spam-Score: 0.6 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,NO_REAL_NAME=0.55 Subject: Re: LF: exciter for 137 and 500 kHz Content-Type: multipart/alternative; boundary="----=_NextPart_000_0009_01CB7E0E.A7F4C7B0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.8 required=5.0 tests=HTML_40_50,HTML_MESSAGE, NO_REAL_NAME 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-sid: 3039cdbc9d0f4cd624a511b3 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none ------=_NextPart_000_0009_01CB7E0E.A7F4C7B0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Andy It's been a while ... but believe I used this online calculator. http://www.werewoolf.org.je/apf.htm Jay ----- Original Message ----- From: Andy Talbot To: rsgb_lf_group@blacksheep.org Sent: Saturday, November 06, 2010 9:59 AM Subject: Re: LF: exciter for 137 and 500 kHz Very Interesting. Where did you find the design data for the allpass network? I've only been able to find the values for up to 3+3 allpass stages. Mind you, at that number of chips a DSPic begins to look attractive. Andy www.g4jnt.com On 6 November 2010 11:52, wrote: Nothing earth shattering ... another way to skin the cat. The 137 and 500 kHz units have been in use for a few years ... just now getting around to the write up. http://www.w1vd.com/137-500Phasingexciter.html Jay W1VD WD2XNS WE2XGR/2 ------=_NextPart_000_0009_01CB7E0E.A7F4C7B0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Andy
 
It's been a while ... but b= elieve I used=20 this online calculator.
 
 
Jay
 
 
----- Original Message -----
From:=20 Andy Talbot
Sent: Saturday, November 06,= 2010 9:59=20 AM
Subject: Re: LF: exciter for= 137 and 500=20 kHz

Very Interesting.  
Where did you find the design data for the allpass=20 network?   I've only been able to find the values for up= to 3+3=20 allpass stages.
 
Mind you, at that number of chips a DSPic begins to= look=20 attractive.
 
On 6 November 2010 11:52, &= lt;jrusgrove@comcast.net<= /A>>=20 wrote:
Nothing=20 earth shattering ... another way to skin the cat. The 137 and 500= kHz units=20 have been in use for a few years ... just now getting around to th= e write=20 up.

http://www.w1vd.com/137-500Phasingexciter.ht= ml

Jay=20 W1VD  WD2XNS  WE2XGR/2=20


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