Return-Path: X-Spam-DCC: paranoid 1480; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.1 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_HOTMAIL_RCVD,HTML_MESSAGE,SPF_PASS autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id u91KvOX5016183 for ; Sat, 1 Oct 2016 22:57:24 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1bqRIP-0002nh-1E for rs_out_1@blacksheep.org; Sat, 01 Oct 2016 21:54:09 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1bqRIO-0002nY-D1 for rsgb_lf_group@blacksheep.org; Sat, 01 Oct 2016 21:54:08 +0100 Received: from bay004-omc3s19.hotmail.com ([65.54.190.157]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-SHA384:256) (Exim 4.87) (envelope-from ) id 1bqRIJ-0007Sq-Sv for rsgb_lf_group@blacksheep.org; 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Sat, 1 Oct 2016 20:53:58 +0000 Received: from DB6PR1001MB1320.EURPRD10.PROD.OUTLOOK.COM (10.152.4.52) by DB5EUR01FT035.mail.protection.outlook.com (10.152.4.243) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.629.5 via Frontend Transport; Sat, 1 Oct 2016 20:53:57 +0000 Received: from DB6PR1001MB1320.EURPRD10.PROD.OUTLOOK.COM ([10.171.77.147]) by DB6PR1001MB1320.EURPRD10.PROD.OUTLOOK.COM ([10.171.77.147]) with mapi id 15.01.0639.013; Sat, 1 Oct 2016 20:53:58 +0000 From: James Cowburn To: "rsgb_lf_group@blacksheep.org" Thread-Topic: LF: interfacing tips for audio amps courtesy John and Jay in the US - 472/137 Thread-Index: AdIcF131jkDl/d4eSAuadFmcknKZ2wACjrWAAAEThQA= Date: Sat, 1 Oct 2016 20:53:57 +0000 Message-ID: References: In-Reply-To: Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=softfail (sender IP is 10.152.4.52) smtp.mailfrom=outlook.com; blacksheep.org; 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x-ms-office365-filtering-correlation-id: 41cb503c-3536-4a9c-7eca-08d3ea3d0fa1 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(1601124038)(1603103081)(1601125047);SRVR:DB5EUR01HT061; x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(432015012)(82015046);SRVR:DB5EUR01HT061;BCL:0;PCL:0;RULEID:;SRVR:DB5EUR01HT061; x-forefront-prvs: 00826B6158 spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM MIME-Version: 1.0 X-OriginatorOrg: outlook.com X-MS-Exchange-CrossTenant-originalarrivaltime: 01 Oct 2016 20:53:57.8719 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Internet X-MS-Exchange-CrossTenant-id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB5EUR01HT061 X-OriginalArrivalTime: 01 Oct 2016 20:54:00.0773 (UTC) FILETIME=[EFAE9750:01D21C25] X-Scan-Signature: 95c202c4948d9b6d0896e68e12fe8e98 Subject: RE: LF: interfacing tips for audio amps courtesy John and Jay in the US - 472/137 Content-Type: multipart/alternative; boundary="_000_DB6PR1001MB1320D915FE8054E869C77BC2ECC00DB6PR1001MB1320_" 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 8900 --_000_DB6PR1001MB1320D915FE8054E869C77BC2ECC00DB6PR1001MB1320_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Mal I do indeed have a decca unit with 3 onboard 5501s and 2 spare 5501s and a = home brewed 5501 test rig. I bought it all in Dec. 2009 from the SK sale= of the late great G3AQC along with a Decca vario/coil, a 60V PSU (heavier = than jupiter!!) and several W&G rx and tx units, but due to work and later = illness issues with me and the XYL they have lain fallow for a few years. Now we're all healthy again , at some point I'm going to commission it with= the PSU. If you have details on how best to feed my IC706 into it then I'd be very g= rateful. I don't have a TS590, though I know they are a good box. I do ha= ve a 570S but that won't play down at LF/MF. The 706mk2G and even the aged and venerable IC735 will play down at LF and = MF, though the IC735 is less happy and has a tendency to burn its LPF and/o= r PA. (I've done both!! Geoff at Castle likes me!) The 706mk2g is very well behaved @ 472khz and while only generating around = 33% of it's nominal max rating, that's still the thick end of 30W @ MF. At 137 it is very QRPP and only gives out a few milliwatts at best. The TX= only really comes alive at about 250khz+ At 137 though, there's enough to act as a low power exciter for a Hafler or= a Decca. The haflers only need 10dBm in to get 250W+ out. The haflers are rated at 500W @ 50khz and -3dB down at 150 to 500 khz but = that's still 250W Last year, I treated myself to a ELAD FDM Duo and that will happily squirt = out 0dBm at anything from 10hz up to 60mhz via the transverter output. A = cheapo 1w broadband amp off ebay spins this up to 1w and then that can be f= ed into the Hafler or Decca to get some QRO. I'm thinking of using the EL= AD as an exciter for the dreamers band. Last time I was on 8.9khz, I was = using an old audio sig gen, but my antenna system was nothing but a "worm w= armer". I think now with some daisy chained coils and a better earth I migh= t just be able to make the hop to G3XIZ, 2 miles away or I may try Roger's = earth electrode system too. If you can email the schematics for interfacing the 5501s that would be gre= at Jim.cowburn@outlook.com With best regards Jim Dr. Jim Cowburn This email is sent from the account of Dr. James Cowburn and is strictly co= nfidential and intended solely for the addressee(s).If you are not the inte= nded recipient of this email you must: (i) not disclose, copy or distribute= its contents to any other person nor use its contents in any way or you ma= y be acting unlawfully; (ii) contact Dr. Cowburn immediately on +44 (0)1767= 600522 quoting the the addressee then delete it from your system. I have = taken reasonable precautions to ensure that no viruses are contained in thi= s email, but do not accept any responsibility once this email has been tran= smitted. You should scan attachments (if any) for viruses. ________________________________ From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacks= heep.org] On Behalf Of Mal Hamilton Sent: 01 October 2016 21:23 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: interfacing tips for audio amps courtesy John and Jay in t= he US - 472/137 Jim Do u have Decca 5501 units if so they work well on MF I can supply details to resonate on MF and interface to ts590 or ic706 73 Mal G3KEV On 1 Oct 2016, at 20:10, James Cowburn > wrote: Hi all John sent me over this sketch of how best to interface my 706 to a Hafler a= udio amp as well as some schematics from their excellent website on the sub= ject http://www.w1vd.com/page21.html http://www.w1tag.com/pix/Hafler_Amp.jpg http://www.w1vd.com/Haflertransformers.html I have a 3000, though John informs me that these don't play nice on 472. I've got the coax and the -77 material cores and caps so it's time to get b= uilding. I'm on the lookout for a 9505 but most on Ebay are outside my budget and a= lso US spec and need 110V, though I could always get a converter. If the weather stays dry, then I'm hoping to crack on with this, this week = and get G7NKS to be a bit more QRO and hopefully crack the T/A and 2000km b= arriers on WSPR 472. That'll be the broadband gone then! Stefan helpfully sent me over some id= eas to look for how to proof the router against interference, but it may we= ll just be a cheapo BT Homehub 4 and it's internal aerials. Enjoy the darker months guys and hope to see you all on MF and LF With best regards Jim Dr. Jim Cowburn G7NKS IO92ub --_000_DB6PR1001MB1320D915FE8054E869C77BC2ECC00DB6PR1001MB1320_ Content-Type: text/html; charset="us-ascii" Content-ID: <2A5A87286513F247BEAAB32E004988B3@EURPRD10.PROD.OUTLOOK.COM> Content-Transfer-Encoding: quoted-printable

Hi Mal

 

I do indeed have a decca unit with 3 o= nboard 5501s and 2 spare 5501s and a home brewed 5501 test rig.   = ; I bought it all in Dec. 2009 from the SK sale of the late great G3AQC along with a Decca vario/coil, a = 60V PSU (heavier than jupiter!!) and several W&G rx and tx units, but d= ue to work and later illness issues with me and the XYL they have lain fall= ow for a few years.

 

Now we're all healthy again , at some = point I'm going to commission it with the PSU.  

 

If you have details on how best to fee= d my IC706 into it then I'd be very grateful.  I don't have a TS590, t= hough I know they are a good box.  I do have a 570S but that won't play down at LF/MF. =

 

The 706mk2G and even the aged and vene= rable IC735 will play down at LF and MF, though the IC735 is less happy and= has a tendency to burn its LPF and/or PA.  (I've done both!!  Geoff at Castle likes me!= )

 

The 706mk2g is very well behaved @ 472= khz and while only generating around 33% of it's nominal max rating, that's= still the thick end of 30W @ MF.  

 

At 137 it is very QRPP and only gives = out a few milliwatts at best.  The TX only really comes alive at about= 250khz+

 

At 137 though, there's enough to act a= s a low power exciter for a Hafler or a Decca.  The haflers only need = 10dBm in to get 250W+ out.

 

The haflers are rated at 500W @ 50khz = and -3dB down at  150 to 500 khz but that's still 250W

 

Last year, I treated myself to a ELAD = FDM Duo and that will happily squirt out 0dBm at anything from 10hz up to 6= 0mhz via the transverter output.   A cheapo 1w broadband amp off ebay spins this up to 1w= and then that can be fed into the Hafler or Decca to get some QRO.  &= nbsp;I'm thinking of using the ELAD as an exciter for the dreamers band. &n= bsp; Last time I was on 8.9khz, I was using an old audio sig gen, but my antenna system was nothing but a "worm warmer". = I think now with some daisy chained coils and a better earth I might just b= e able to make the hop to G3XIZ, 2 miles away or I may try Roger's earth el= ectrode system too.

 

If you can email the schematics for in= terfacing the 5501s that would be great

 

Jim.cowburn@outlook.com

 

 

 

With best regards

 

 

Jim

 

 

Dr. Jim Cowburn

 

This email is sent from the account of Dr. James = Cowburn and is strictly confidential and intended solely for the addressee(s).If you are not the i= ntended recipient of this email you must: (i) not disclose, copy or distrib= ute its contents to any other person nor use its contents in any way or you= may be acting unlawfully; (ii) contact Dr. Cowburn immediately on +44 (0)1767 600522 quoting the= the addressee then delete it from your system.  I have taken reasonab= le precautions to ensure that no viruses are contained in this email, but d= o not accept any responsibility once this email has been transmitted. You sho= uld scan attachments (if any) for viruses.

 

 

From: owner-rsgb_lf_group@blacksheep.or= g [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Mal Hamilton
Sent: 01 October 2016 21:23<= br> To: rsgb_lf_group@blacksheep= .org
Subject: Re: LF: interfacing= tips for audio amps courtesy John and Jay in the US - 472/137

 

Jim

Do u have Decca 5501 units if so they work well on MF

I can supply details to resonate on MF and interface to ts590 or ic= 706

73 Mal

G3KEV

 


On 1 Oct 2016, at 20:10, James Cowburn <jim.cowburn@outlook.com> wrote:<= /p>

Hi all

 

John sent me over this sketch of how best to interface m= y 706 to a Hafler audio amp as well as some schematics from their excellent= website on the subject

 

http://www.w= 1vd.com/page21.html

 

http= ://www.w1tag.com/pix/Hafler_Amp.jpg

 

= http://www.w1vd.com/Haflertransformers.html<= o:p>

 

I have a 3000, though John informs me that these don't p= lay nice on 472.

 

I've got the coax and the -77 material cores and caps so= it's time to get building.

 

I'm on the lookout for a 9505 but most on Ebay  are= outside my budget and also US spec and need 110V, though I could always ge= t a converter.

 

If the weather stays dry, then I'm hoping to crack on wi= th this, this week and get G7NKS to be a bit more QRO and hopefully crack t= he T/A and 2000km barriers on WSPR 472.

 

That'll be the broadband gone then!   Stefan h= elpfully sent me over some ideas to look for how to proof the router agains= t interference, but it may well just be a cheapo BT Homehub 4 and it’s internal aerials.

 

Enjoy the darker months guys and hope to see you all on = MF and LF

 

 

 

With best regards<= /p>

 

 

Jim

 

 

Dr. Jim Cowburn  G7NKS IO92ub

 

 

<Halfer interfacing with 706 courtesy John in US.pdf>

<Haflertransformers.pdf>

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