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[195.171.43.25]) by mx.google.com with ESMTP id nh20si1324687wic.118.2014.04.04.13.13.05 for ; Fri, 04 Apr 2014 13:13:06 -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=fail (test mode) header.i=@btopenworld.com Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1WWAAl-0003Ji-TC for rs_out_1@blacksheep.org; Fri, 04 Apr 2014 20:53:07 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1WWAAl-0003JZ-BJ for rsgb_lf_group@blacksheep.org; Fri, 04 Apr 2014 20:53:07 +0100 Received: from smtpout14.bt.lon5.cpcloud.co.uk ([65.20.0.134]) by relay1.thorcom.net with esmtp (Exim 4.82) (envelope-from ) id 1WWAAi-0005dY-I3 for rsgb_lf_group@blacksheep.org; Fri, 04 Apr 2014 20:53:06 +0100 X-DKIM-Result: Domain=btopenworld.com Result=Signature OK X-CTCH-RefID: str=0001.0A090202.533F0D9E.00C2,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0 X-Junkmail-Premium-Raw: score=8/97,refid=2.7.2:2014.3.20.72420:17:8.317,ip=,rules=__HAS_FROM, __TO_MALFORMED_2, __TO_NO_NAME, __HAS_MSGID, __SANE_MSGID, __MIME_VERSION, __CT, __CTYPE_MULTIPART_ALT, __CTYPE_HAS_BOUNDARY, __CTYPE_MULTIPART, __HAS_X_PRIORITY, __HAS_MSMAIL_PRI, __HAS_X_MAILER, __USER_AGENT_MS_GENERIC, __IN_REP_TO, __ANY_URI, __URI_NO_WWW, __URI_NO_PATH, __CP_MEDIA_BODY, __HTML_FONT_BLUE, __HAS_HTML, HTML_NO_HTTP, BODYTEXTP_SIZE_3000_LESS, BODYTEXTH_SIZE_10000_LESS, __MIME_HTML, __TAG_EXISTS_HTML, __STYLE_RATWARE_NEG, __URI_NS, HTML_50_70 X-CTCH-Spam: Unknown Received: from taurids (86.163.170.8) by smtpout14.bt.lon5.cpcloud.co.uk (8.6.100.99.10223) (authenticated as ganymede444) id 53184B8C01DC7245 for rsgb_lf_group@blacksheep.org; Fri, 4 Apr 2014 20:53:02 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=btopenworld.com; s=btcpcloud; t=1396641184; bh=/zhY6YSsCFoOIDAvWQUKlqOmLTqm+uVUqKBAlcZF4OI=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type:X-Mailer:In-Reply-To; b=f5pBhnKhbLvCs/1SqnPwOVC5h6YBQMOsEd0gDK0aoQvCQpoVec2haO1qd0HdLeci2APtuv96ff8ohfRbH8EsAORbNbDOs6c7cCybxDicaJeGTi5yQf88+OmkukZ2kY36c+n8tVW4I3iNtnNlzxL4UfXZa2Miw1lgkPN3SwvHgVQ= From: "Dave G3WCB." To: Date: Fri, 4 Apr 2014 20:53:02 +0100 Message-ID: MIME-Version: 1.0 X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) In-Reply-To: Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Spam-Score: 0.0 (/) 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: Hi, Laurence. Yep, done that. My U2 usually drives an outboard 20W 475 kHz PA in WSPR mode, and at the moment is driving a 180W PA on 137.500. I leave the U2 PA in circuit, and feed it into a 50 attenuator to reduce the drive to the outboard PA. (My outboard PA has it's own driver, and only needs about 10dBm drive) [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [65.20.0.134 listed in list.dnswl.org] 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: 5f3d51ad98dd7d967f54e1b86b99caac Subject: LF: Ultimate 2 or 3 as driver for external Class D Content-Type: multipart/alternative; boundary="----=_NextPart_000_0026_01CF5047.DEB86400" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.8 required=5.0 tests=FROM_ENDS_IN_NUMS,HTML_30_40, HTML_FONTCOLOR_BLUE,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 This is a multi-part message in MIME format. ------=_NextPart_000_0026_01CF5047.DEB86400 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Hi, Laurence. Yep, done that. My U2 usually drives an outboard 20W 475 kHz PA in WSPR mode, and at the moment is driving a 180W PA on 137.500. I leave the U2 PA in circuit, and feed it into a 50 attenuator to reduce the drive to the outboard PA. (My outboard PA has it's own driver, and only needs about 10dBm drive) You can buy a 630m or 2200m plug in LPF from Hans Summers, or make your own, as I did. For a long time, the only LPF I had for my U2 was a 20m filter. I left this in circuit, and relied on the filter in the PA to remove any harmonics. The 20m LPF is completely transparent at 630m. I've also rigged Send-Receive switching for my U2. The U2 processor keys a BS170, which is in series with the output BS170. You can use the same keying voltage to drive another BS170 that controls a Send-Receive or antenna changeover relay. It also switches the PA from "Standby" to "Send". The relay switches over with each of the QRSS symbols, which gets a bit noisy, but is fine for WSPR. I've added a slight delay to my outboard PA so that the PA driver doesn't turn on for a few milliseconds after it is switched to "Send" by the U2. This removes the risk of the Send-Receive relay hot switching when there is RF present. My 630m PA uses a single IRF540 in Class E, running from 13.6VDC, and is loosely based on one of Roger's designs. (GW3UEP). Efficiency and output could be improved by running it from 24VDC, but it's fine when running WSPR2 at 25W out. There's a couple of pics of the U2 on my QRZ.com page. Hope this helps! 73, Dave G3WCB IO91RM. -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of Laurence KL7 L Sent: 04 April 2014 17:43 To: rsgb_lf_group@blacksheep.org Subject: LF: XXM decode and Ultimate 2 or 3 as driver for external Class D If anyone has successfully used a Ultimate 2 or 3 to drive an external 500kHz class D PA direct from the DDS outpins or via the BS170 (say into a TC4426 driving a IRF640) Id like to hear about any pit falls/expereinces before I let smoke escape :-) with thanks One lonely decode last night WG2XXM 475.712 -31 @1006Z on L400B/25ft @ 4600Kms - sure was a noisy night. Nothing decoded non the NNE/SSW 1/4Y resonant loop - sometimes small is better :-) Laurence KL7L WE2XPQ Alaska ------=_NextPart_000_0026_01CF5047.DEB86400 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi,=20 Laurence.
Yep,=20 done that. My U2 usually drives an outboard 20W 475 kHz PA in WSPR = mode,=20 and at the moment is driving a 180W PA on 137.500.
 
I=20 leave the U2 PA in circuit, and feed it into a 50 attenuator to = reduce the=20 drive to the outboard PA. (My outboard PA has it's own driver, and only = needs=20 about 10dBm drive)
 
You=20 can buy a 630m or 2200m plug in LPF from Hans Summers, or make your = own, as=20 I did. For a long time, the only LPF I had for my U2 was a 20m filter. I = left=20 this in circuit, and relied on the filter in the PA to remove any = harmonics. The=20 20m LPF is completely transparent at 630m.
 
I've=20 also rigged Send-Receive switching for my U2. The U2 processor keys a = BS170,=20 which is in series with the output BS170. You can use the same keying = voltage to=20 drive another BS170 that controls a Send-Receive or antenna changeover = relay. It=20 also switches the PA from "Standby" to "Send". The relay switches over = with each=20 of the QRSS symbols, which gets a bit noisy, but is fine for=20 WSPR.
 
I've=20 added a slight delay to my outboard PA so that the PA driver doesn't = turn on for=20 a few milliseconds after it is switched to "Send" by the U2. This = removes the=20 risk of the Send-Receive relay hot switching when there is RF present.=20
 
My=20 630m PA uses a single IRF540 in Class E, running from 13.6VDC, and is = loosely=20 based on one of Roger's designs. (GW3UEP). Efficiency and output = could be=20 improved by running it from 24VDC, but it's fine when running WSPR2 at = 25W=20 out.
 
There's a couple of pics of the U2 on my QRZ.com=20 page.
 
Hope=20 this helps!
 
73,=20 Dave G3WCB IO91RM.
-----Original Message-----
From:=20 owner-rsgb_lf_group@blacksheep.org=20 [mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of = Laurence KL7=20 L
Sent: 04 April 2014 17:43
To:=20 rsgb_lf_group@blacksheep.org
Subject: LF: XXM decode and = Ultimate 2=20 or 3 as driver for external Class D

If anyone has successfully used a Ultimate 2 or 3 to = drive an=20 external 500kHz class D PA direct from the DDS outpins or via the = BS170=20 (say into a TC4426 driving a IRF640) Id like to hear about any pit=20 falls/expereinces before I let smoke escape :-)
 
with=20 thanks
 
One lonely decode last night WG2XXM 475.712 -31=20 @1006Z on L400B/25ft @ 4600Kms  - sure was a noisy night. = Nothing=20 decoded non the NNE/SSW 1/4Y resonant loop - sometimes small = is=20 better :-)
 
Laurence KL7L WE2XPQ=20 Alaska

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