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[195.171.43.25]) by mx.google.com with ESMTP id cw8si267318wjb.27.2013.08.05.11.58.04 for ; Mon, 05 Aug 2013 11:58:05 -0700 (PDT) Received-SPF: neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) smtp.mail=owner-rsgb_lf_group@blacksheep.org; dkim=pass header.i=@gmail.com Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1V6PSh-0005yH-BD for rs_out_1@blacksheep.org; Mon, 05 Aug 2013 19:24:55 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1V6PSg-0005y8-LR for rsgb_lf_group@blacksheep.org; Mon, 05 Aug 2013 19:24:54 +0100 Received: from mail-ob0-f175.google.com ([209.85.214.175]) by relay1.thorcom.net with esmtps (TLSv1:RC4-SHA:128) (Exim 4.77) (envelope-from ) id 1V6PSe-0002Zq-4k for rsgb_lf_group@blacksheep.org; Mon, 05 Aug 2013 19:24:53 +0100 Received: by mail-ob0-f175.google.com with SMTP id xn12so6358917obc.34 for ; Mon, 05 Aug 2013 11:24:49 -0700 (PDT) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=v9NKW2P/gnSgRYtuqAKGzKvAgU4HB++7rCmerYwWeRE=; b=wiwgeFOsHRf47vonlfielbw84uRh0BiBl8Z6R0ZsAeoRuwuUfjHwKxisWXHInCiDdq 8qAMSoNp/wrk8q4AXojVyTHVFiUnwekekjpswMJWJEOiC1jhn3aW8lRncFQpljTqqH17 Fwby6kbtDLM+q4ySEtlqtkOrfdgP2fWa5cASOsaOFJZrKKe1IGdACRPUmJokzLTYAKnC BVZwZ/eDtf44nb53/geGXhw3UMFUm1iUL9GULRtri+Hq0DzZbK8oIsu5sYCkdc5h6vmv pmBAlztGU7aDywtu1nG10SBxhw0nKYmYp1EpwlAVDP7jNlV3xFqEdV/MdLJoZtXQio/I tozw== MIME-Version: 1.0 X-Received: by 10.182.213.10 with SMTP id no10mr15116589obc.76.1375727089391; Mon, 05 Aug 2013 11:24:49 -0700 (PDT) Received: by 10.60.161.237 with HTTP; Mon, 5 Aug 2013 11:24:49 -0700 (PDT) In-Reply-To: <14DF884860084F5B83C1FD88B0FC763B@malHP> References: <5B7EABE7E07E4CBA942ABD001F4587E3@malHP> <14DF884860084F5B83C1FD88B0FC763B@malHP> Date: Mon, 5 Aug 2013 14:24:49 -0400 Message-ID: From: Warren Ziegler To: rsgb_lf_group X-Spam-Score: -0.7 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Thank you Mal! That should do it! 73 Warren On Mon, Aug 5, 2013 at 1:51 PM, mal hamilton wrote: [...] Content analysis details: (-0.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [209.85.214.175 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (wd2xgj[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: ea325ff0d4a9c53a3010c97c9e919a12 Subject: Re: LF: Re: Decca Experts - Converting Red to Purple ? Content-Type: multipart/alternative; boundary=001a11c2deaa789dea04e3376cf7 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.9 required=5.0 tests=HTML_30_40, HTML_FONTCOLOR_UNSAFE,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 Status: O X-Status: X-Keywords: X-UID: 2761 --001a11c2deaa789dea04e3376cf7 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Thank you Mal! That should do it! 73 Warren On Mon, Aug 5, 2013 at 1:51 PM, mal hamilton wrote: > GUARD CCT > LOW BAND IS C1 =96330nF plus C2 =96470nF in parallel resonates with the l= ink > winding of 9 turns > The link winding has 9 turns on LOW band units and should be within > tolerance for73 khz > 6F units/85 Khz had 59 turns on main coil, 5F units would have more > turns. > Hope this helps > de mal/g3kev > > > > *From:* Warren Ziegler > *Sent:* Monday, August 05, 2013 2:27 PM > *To:* rsgb_lf_group > *Subject:* Re: LF: Re: Decca Experts - Converting Red to Purple ? > > Mal, > Many thanks for the info on the low bad Decca tanks! > Does your handbook call out the specs for the guard circuit (link coil an= d > capacitance)? > > 73 Warren > > > > On Mon, Aug 5, 2013 at 8:00 AM, mal hamilton wrote= : > >> Hi Warren >> Decca LOW BAND --------------inductor L reqd to resonate on 73 khz >> ------------126.75 uH ie Total C in PA unit 37.5 nF plus 126.75 uH in >> series =3D=3D=3D=3D=3D 73 Khz >> High band versions do not have enough C in PA UNIT >> 73 DE MAL/G3KEV >> >> >> >> *From:* Warren Ziegler >> *Sent:* Monday, August 05, 2013 1:59 AM >> *To:* rsgb_lf_group >> *Subject:* Re: LF: Fw: Decca Experts - Converting Red to Purple ? >> >> Hi Mal, >> >> Many thanks for the e-mail! >> I am looking for details on the tank circuit for the "Purple" Decca whic= h >> was on 70.8 kHz - either inductance or number of turns or capacitance. >> Also, any details on the guard circuit for the 70kHz version - how many >> turns on the link and capacitance. >> I have an unconverted 112kHz unit, not sure if that is considered high >> band or low band? >> >> I really appreciate your help! >> >> vy 73 Warren K2ORS >> >> >> >> On Sun, Aug 4, 2013 at 3:08 PM, mal hamilton wrot= e: >> >>> >>> >>> *From:* mal hamilton >>> *Sent:* Sunday, August 04, 2013 7:59 PM >>> *To:* rsgb_lf_group@blacksheep.org >>> *Subject:* Re: LF: Decca Experts - Converting Red to Purple ? >>> >>> Warren >>> I have all the original handbooks for the Decca 5501 range if you need >>> specific info let me know. The low band versions have a different Capac= itor >>> board and are easy to mod for 73 Khz >>> The higher band versions are not so convenient to mod for 73 but more >>> suited to 136. >>> I have 2 x 5501 units for the high band modified for 136 but fortunatel= y >>> I have 2 x C boards for the low band so I just need to modify the Coil= s >>> for 73 if we got this band again >>> I was active on 73 towards the end but by then nearly everyone had move= d >>> to 136 >>> Most hams in the UK were using modified Audio amps on 73 and I do not >>> recall anyone using the decca on that band at the time. Decca amps were= not >>> available in the early days of 73 >>> Modes at the time were CW and QRSS >>> mal/g3kev >>> >>> >>> >>> >>> >>> >>> >>> >>> *From:* Warren Ziegler >>> *Sent:* Sunday, August 04, 2013 1:28 AM >>> *To:* rsgb_lf_group >>> *Subject:* LF: Decca Experts - Converting Red to Purple ? >>> >>> Hello to all of the Decca Navigator experts out there... >>> >>> I have an unconverted Decca 5501 transmitter which is marked "Red" = - >>> I believe that is 112kHz - would like to run it on 73kHz. The tank coi= l >>> reads about 80uH, can I just pad it down with more "C" to get to 73kHz = or >>> would that mess up the L/C ratio and thus lower the loaded "Q" ? >>> >>> Another question - anyone have a spare "Purple" Decca on 71kHz that >>> they would consider parting with? >>> >>> >>> >>> -- >>> 73 Warren K2ORS >>> WD2XGJ >>> WD2XSH/23 >>> WE2XEB/2 >>> WE2XGR/1 >>> WG2XRS/1 >>> >>> >>> >>> >> >> >> >> -- >> 73 Warren K2ORS >> WD2XGJ >> WD2XSH/23 >> WE2XEB/2 >> WE2XGR/1 >> >> >> > > > > -- > 73 Warren K2ORS > WD2XGJ > WD2XSH/23 > WE2XEB/2 > WE2XGR/1 > > > --=20 73 Warren K2ORS WD2XGJ WD2XSH/23 WE2XEB/2 WE2XGR/1 --001a11c2deaa789dea04e3376cf7 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
Thank you Mal!=A0
That should do it!

73 Warren



On Mon, Aug 5, 2013 at 1:51 PM, mal hamilton <= g3kevmal@talktalk.net> wrote:
GUARD CCT
LOW BAND IS C1 =96330nF plus C2 =96470nF in parallel resonates with th= e link=20 winding of 9 turns
The link winding has 9 turns on LOW band units and should be within=20 tolerance for73 khz
6F units/85 Khz had 59 turns on main coil,=A0 5F units would have more= =20 turns.
Hope this helps
de mal/g3kev
=A0
=A0
=A0
Sent: Monday, August 05, 2013 2:27 PM
Subject: Re: LF: Re: Decca Experts - Converting Red to Purple= =20 ?
=A0
Mal,=20
=A0=A0=A0 Many thanks for the info on the low bad Decca=20 tanks!
Does your handbook call out the specs for the guard circuit (link coil= and=20 capacitance)?
=A0
73 Warren
=A0


On Mon, Aug 5, 2013 at 8:00 AM, mal hamilton <g3kevmal@talktalk.net> wrote:
Hi Warren
Decca LOW BAND --------------inductor L reqd to resonate on 73 khz= =20 ------------126.75 uH ie=A0 Total C in PA unit 37.5 nF plus 126.75 uH in= =20 series =3D=3D=3D=3D=3D 73 Khz
High band versions do not have enough C in PA UNIT
73 DE MAL/G3KEV
=A0
=A0
=A0
Sent: Monday, August 05, 2013 1:59 AM
Subject: Re: LF: Fw: Decca Experts - Converting Red to Purple= =20 ?
=A0
Hi Mal,=20
=A0
=A0=A0 Many thanks for the e-mail!
I am looking for details on the tank circuit for the "Purple&qu= ot; Decca which=20 was on 70.8 kHz - either inductance or number of turns or capacitance. Al= so,=20 any details on the guard circuit for the 70kHz version - how many turns o= n the=20 link and capacitance.
I have an unconverted 112kHz unit, not sure if that is considered hi= gh=20 band or low band?
=A0
=A0=A0=A0 I really appreciate your help!
=A0
vy 73 Warren K2ORS
=A0


On Sun, Aug 4, 2013 at 3:08 PM, mal hamilton <= span dir=3D"ltr"><g3kevmal@talktalk.net> wrote:
=A0
=A0
Sent: Sunday, August 04, 2013 7:59 PM
Subject: Re: LF: Decca Experts - Converting Red to Purple= =20 ?
=A0
Warren
I have all the original handbooks for the Decca 5501 range if you = need=20 specific info let me know. The low band versions have a different Capac= itor=20 board and are easy to mod for 73 Khz
The higher band versions are not so convenient to mod for 73 but m= ore=20 suited to 136.
I have 2 x 5501 units for the high band modified for 136 but=20 fortunately I have 2 x C boards=A0 for the low band so I just need to= =20 modify the Coils for 73 if we got this band again
I was active on 73 towards the end but by then nearly everyone had= =20 moved to 136
Most hams in the UK were using modified Audio amps on 73 and I do = not=20 recall anyone using the decca on that band at the time. Decca amps were= not=20 available in the early days of 73
Modes at the time were CW and QRSS
mal/g3kev
=A0
=A0
=A0
=A0
=A0
=A0
=A0
=A0
Sent: Sunday, August 04, 2013 1:28 AM
Subject: LF: Decca Experts - Converting Red to Purple=20 ?
=A0
Hello to all of the Decca Navigator experts out there.= ..=20
=A0
=A0=A0=A0 I have an unconverted Decca 5501 transmitter which=20 is marked "Red" - I believe that is 112kHz - would like to ru= n it on=20 73kHz.=A0 The tank coil reads about 80uH, can I just pad it down with= =20 more "C" to get to 73kHz or would that mess up the L/C ratio = and thus lower=20 the loaded "Q" ?
=A0
=A0=A0=A0 Another question - anyone have a spare "Purple"= ;=20 Decca on 71kHz that they would consider parting with?
=A0
=A0
=A0
--
73 Warren=20 K2ORS
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=20 WD2XGJ=20
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=20 WD2XSH/23
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=20 WE2XEB/2
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=20 WE2XGR/1
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=20 WG2XRS/1


=A0=20


=A0
--
73 Warren=20 K2ORS
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=20 WD2XGJ=20
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=20 WD2XSH/23
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=20 WE2XEB/2
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=20 WE2XGR/1

=A0=20


=A0
--
73 Warren=20 K2ORS
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=20 WD2XGJ=20
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=20 WD2XSH/23
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=20 WE2XEB/2
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=20 WE2XGR/1

=A0



--
73 Warren K2= ORS
=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 WD2XGJ
=A0 =A0 =A0 =A0 =A0 =A0 = =A0 =A0 WD2XSH/23
=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 WE2XEB/2
=A0 =A0 = =A0 =A0 =A0 =A0 =A0 =A0 WE2XGR/1

=A0 --001a11c2deaa789dea04e3376cf7--