Return-Path: Received: from rly-mg01.mx.aol.com (rly-mg01.mail.aol.com [172.20.83.107]) by air-mg03.mail.aol.com (v124.15) with ESMTP id MAILINMG033-9f24a5ce389105; Tue, 14 Jul 2009 15:59:36 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-mg01.mx.aol.com (v124.15) with ESMTP id MAILRELAYINMG014-9f24a5ce389105; Tue, 14 Jul 2009 15:59:06 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1MQo8d-0003i2-QN for rs_out_1@blacksheep.org; Tue, 14 Jul 2009 20:58:07 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1MQo8d-0003ht-0F for rsgb_lf_group@blacksheep.org; Tue, 14 Jul 2009 20:58:07 +0100 Received: from mtaout01-winn.ispmail.ntl.com ([81.103.221.47]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1MQo8P-0005JP-KI for rsgb_lf_group@blacksheep.org; Tue, 14 Jul 2009 20:57:57 +0100 Received: from know-smtpout-2.server.virginmedia.net ([62.254.123.2]) by mtaout01-winn.ispmail.ntl.com (InterMail vM.7.08.04.00 201-2186-134-20080326) with ESMTP id <20090714195753.QLFS6742.mtaout01-winn.ispmail.ntl.com@know-smtpout-2.server.virginmedia.net> for ; Tue, 14 Jul 2009 20:57:53 +0100 Received: from [86.26.88.245] (helo=jimdesk) by know-smtpout-2.server.virginmedia.net with esmtp (Exim 4.63) (envelope-from ) id 1MQo8N-0005ce-EW for rsgb_lf_group@blacksheep.org; Tue, 14 Jul 2009 20:57:53 +0100 From: "James Cowburn" To: References: <1EDB89E6D3E24E008B4897CFE896A09F@lindavideo> <000301ca04b9$3fdbc9f0$0217aac0@jimdesk> <59B43DAF72704927B6E58971E3B9D56A@lindavideo> Date: Tue, 14 Jul 2009 20:57:44 +0100 Message-ID: <000e01ca04bd$5b441900$0217aac0@jimdesk> MIME-Version: 1.0 X-Mailer: Microsoft Office Outlook 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3350 Thread-Index: AcoEujJuxVeEBP2RT5CMuiBwwES4ZAAAuHsg In-Reply-To: <59B43DAF72704927B6E58971E3B9D56A@lindavideo> X-Cloudmark-Analysis: v=1.0 c=1 a=8RloEfZUAAAA:8 a=F3M5lZpKAAAA:8 a=6ighMCG9WntCp6FJ5_gA:9 a=YkFBFXgTZF4zjdCl8tMA:7 a=StcWLl90zYq0asr_0bxvQzzQVIYA:4 a=O58u2wXj750A:10 a=wk6s2zzMB60A:10 a=D9kbpkrCpSrlXFOV:21 a=emymBknhcE7zMPsI:21 a=SSmOFEACAAAA:8 a=Q58WNEsbO_bUY3CUf2sA:9 a=p-3DS5EUBfp52BWGM3YA:7 a=_DIBCSJrmWSqq3r1GLIJ_K7cK6QA:4 a=KHr3HLUKDJYvNzt8:21 a=H_C9ZmxHpIMVQa-L:21 X-Karma: unknown: X-Spam-Score: 0.3 (/) X-Spam-Report: autolearn=disabled,HTML_FONT_BIG=0.256,HTML_MESSAGE=0.001 Subject: LF: RE: Re: RE: Microwave oven transformers Content-Type: multipart/alternative; boundary="----=_NextPart_000_000F_01CA04C5.BD088100" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.7 required=5.0 tests=EXCUSE_16,HTML_60_70, HTML_FONTCOLOR_BLUE,HTML_FONTCOLOR_UNKNOWN,HTML_FONTCOLOR_UNSAFE, HTML_FONT_BIG,HTML_MESSAGE 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-IP: 193.82.116.20 ------=_NextPart_000_000F_01CA04C5.BD088100 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Sorry Ken, I did not mean to trivialize or be facetious but microwave transformers do have a reputation for biting. I will refrain from further obvious comments!! :-) With best regards Jim Dr. James Cowburn 26 Birch Close Broom Biggleswade Beds SG18 9NR T +44 (0) 1767 600522 M+44 (0) 7967 300152 E james.cowburn@virgin.net "The information transmitted is intended only for the person to whom it is addressed and may contain confidential and/or privileged material. If you are not the intended recipient, you are hereby notified that you must not read this message. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. Consequently, this email is not intended to be contractually binding. If you received this in error, please contact the sender, return the message as well as its attachments and delete the whole from any computer." _____ From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Ken Sent: 14 July 2009 20:34 To: rsgb_lf_group@blacksheep.org Subject: LF: Re: RE: Microwave oven transformers Jim. There will probably be a fair bit of technical smoke comimg out of Luton, but that is what our hobby is all about, any other usefull sugestions? Krgards. Ken 73deM0KHW ----- Original Message ----- From: James Cowburn To: rsgb_lf_group@blacksheep.org Sent: Tuesday, July 14, 2009 8:28 PM Subject: LF: RE: Microwave oven transformers Tesla Roulette!! With best regards Jim Dr. James Cowburn 26 Birch Close Broom Biggleswade Beds SG18 9NR T +44 (0) 1767 600522 M+44 (0) 7967 300152 E james.cowburn@virgin.net "The information transmitted is intended only for the person to whom it is addressed and may contain confidential and/or privileged material. If you are not the intended recipient, you are hereby notified that you must not read this message. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. Consequently, this email is not intended to be contractually binding. If you received this in error, please contact the sender, return the message as well as its attachments and delete the whole from any computer." _____ From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Ken Sent: 14 July 2009 20:22 To: rsgb_lf_group@blacksheep.org Subject: LF: Microwave oven transformers Hello everyone. Does any one have experience in using microwave oven transformers in high voltage power units, I acquired two of these at the weekend. I was informed that as they stand the voltage regulation is poor, to improve this the 'Core Shunts' should be removed, (these are laminations between the two stacks), removal of these 'shunts' also has the effect of considerably increasing the magnetisation current. The solution to this seems to be to use two transformers, connecting the both primaries and secondary's in series to restore the 2KV output voltage. Any comments on this most welcome Note for Mal, this is serious stuff not for appliance operators. Regards Ken Wright 73 de M0KHW ------=_NextPart_000_000F_01CA04C5.BD088100 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Sorry Ken,

 

I did not mean= to trivialize or be facetious but microwave transformers do have a reputation for biting.&= nbsp; I will refrain from further obvious comments!!  J

 

 

With best regar= ds

 

 

Jim=

 

 

Dr. James Cowbu= rn

26 Birch Close<= /span>=

Broom

Biggleswade

Beds

SG18 9NR=

 

T +44 (0) 1767= 600522

M+44 (0) 7967= 300152

E james.cowburn@virgin.net

 

<= span lang=3DEN-GB style=3D'font-size: 10.0pt;color:black;font-style:it= alic'>“The information transmitted is intended only for the person to whom it is addressed and may contain= confidential and/or privileged material. If you are not the intended recipient, you= are hereby notified that you must not read this message.
Any review, retransmission, dissemination or other use of, or taking= of any action in reliance upon, this information by persons or entities other= than the intended recipient is prohibited.  Consequently, this email is no= t intended to be contractually binding.
If you received this in error, please contact the sender, return the= message as well as its attachments and delete the whole from any computer.”=

 

From: owner-rsgb_lf_group@blac= ksheep.org [mailto:owner-= rsgb_lf_group@blacksheep.org] On Behalf Of Ken
Sent: 14 July 2009 20:3= 4
To: rsgb_lf_group@blacksheep.org
Subject: LF: Re: RE: Mi= crowave oven transformers

 

Jim.

There will probably be a fair bit of te= chnical smoke comimg out of Luton, but that is what our= hobby is all about, any other usefull sugestions?

 

Krgards.

Ken

73deM0KHW

----- Original Message -----

Sent:= Tuesday, July 14, 2009 8:28 PM

Subject: LF: RE: Microwave oven transformers

 

Tesla Roulette!= !

 

With best regar= ds

 

 

Jim=

 

 

Dr. James Cowbu= rn

26 Birch Close<= /span>=

Broom

Biggleswade

Beds

SG18 9NR=

 

T +44 (0) 1767= 600522

M+44 (0) 7967= 300152

E james.cowburn@virgin.net

 

<= span lang=3DEN-GB style=3D'font-size: 10.0pt;color:black;font-style:it= alic'>“The information transmitted is intended only for the person to whom it is addressed and may contain confidential and/or privileged material. If you are not the intended= recipient, you are hereby notified that you must not read this message.
Any review, retransmission, dissemination or other use of, or taking= of any action in reliance upon, this information by persons or entities other= than the intended recipient is prohibited.  Consequently, this email is no= t intended to be contractually binding.
If you received this in error, please contact the sender, return the= message as well as its attachments and delete the whole from any computer.”=

 

From: owner-rsgb_lf_group@blac= ksheep.org [mailto:owner-= rsgb_lf_group@blacksheep.org] On Behalf Of Ken
Sent: 14 July 2009 20:2= 2
To: rsgb_lf_group@blacksheep.org
Subject: LF: Microwave= oven transformers

 

Hello everyone.

Does any one have experience in using= microwave oven transformers in high voltage power units, I acquired two of these at= the weekend. I was informed that as they stand the voltage regulation is= poor, to improve this the 'Core Shunts' should be removed, (these are laminatio= ns between the two stacks), removal of these 'shunts' also has the effect= of considerably increasing the magnetisation current. The solution to thi= s seems to be to use two transformers, connecting the both primaries and secon= dary's in series to restore the 2KV output voltage.

 

Any comments on this most welcome

 

Note for Mal, this is serious stuff not= for appliance operators.

 

Regards

Ken Wright

 

73 de M0KHW

------=_NextPart_000_000F_01CA04C5.BD088100--