Return-Path: X-Spam-DCC: paranoid 1233; 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=-2.1 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_50_60,HTML_MESSAGE,NORMAL_HTTP_TO_IP 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 tB4LkOfl012898 for ; Fri, 4 Dec 2015 22:46:24 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1a4y8S-0003Gb-Ro for rs_out_1@blacksheep.org; Fri, 04 Dec 2015 21:43:24 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1a4y8S-0003GS-HD for rsgb_lf_group@blacksheep.org; Fri, 04 Dec 2015 21:43:24 +0000 Received: from out1.ip01ir2.opaltelecom.net ([62.24.128.237]) by relay1.thorcom.net with esmtp (Exim 4.86) (envelope-from ) id 1a4y7J-000233-6x for rsgb_lf_group@blacksheep.org; Fri, 04 Dec 2015 21:43:23 +0000 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A2ApAgAGCGJWPKyNH1wNURkBAQEBDwEBAQGCPoEfbr86BxcBCYQ+UF8CJSCBMQEBAQEBAQcBAQEBQAE0hD8BAQEBAgEjKAEoCgsLEQQBASsCAkMMCAYTiCcVrlhxhWsBincBAQEBAQEBAQEBAQEBAQEBAQEBAQEUBIhjgm6ETguCZDoTHIEVBZZhhS2JapAXhwmDcoJ0HYFWcgGFbgEBAQ X-IPAS-Result: A2ApAgAGCGJWPKyNH1wNURkBAQEBDwEBAQGCPoEfbr86BxcBCYQ+UF8CJSCBMQEBAQEBAQcBAQEBQAE0hD8BAQEBAgEjKAEoCgsLEQQBASsCAkMMCAYTiCcVrlhxhWsBincBAQEBAQEBAQEBAQEBAQEBAQEBAQEUBIhjgm6ETguCZDoTHIEVBZZhhS2JapAXhwmDcoJ0HYFWcgGFbgEBAQ X-IronPort-AV: E=Sophos;i="5.20,382,1444690800"; d="scan'208,217";a="809838119" Received: from host-92-31-141-172.as13285.net (HELO [192.168.1.4]) ([92.31.141.172]) by out1.ip01ir2.opaltelecom.net with ESMTP; 04 Dec 2015 21:42:01 +0000 References: <5661C842.3090706@posteo.de> <44ED7091893D488A8C3B235DF1EB31BD@malPC> <5661FA19.8080808@posteo.de> <5661FB17.9050507@posteo.de> From: Mal Hamilton X-Mailer: iPhone Mail (10B500) In-Reply-To: <5661FB17.9050507@posteo.de> Message-Id: <19D32A36-919D-460B-800F-4B8EECD94C15@talktalk.net> Date: Fri, 4 Dec 2015 21:42:01 +0000 To: "rsgb_lf_group@blacksheep.org" Mime-Version: 1.0 (1.0) X-Scan-Signature: e43fe7093e9b3ae0dc118eec4efba8a5 Subject: Re: LF: Re: WSPR OBSERVATIONS Content-Type: multipart/alternative; boundary=Apple-Mail-FB24D8A7-C012-4A4D-8746-11C2EA4E224A Content-Transfer-Encoding: 7bit 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 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 5558 --Apple-Mail-FB24D8A7-C012-4A4D-8746-11C2EA4E224A Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Tnx ur suggestions=20 I do not have a 7667 De mal /g3kev Sent from my iPhone On 4 Dec 2015, at 20:44, DK7FC wrote: > PS: Watch the duty cycle of the output signal. I don't know how accurate i= t has to be for that PA. Maybe you'll need another amp stage in front of the= 4426 and anti-serial Z-diodes. Or an op amp stage... There are several meth= ods as i said :-) > 73 >=20 > Am 04.12.2015 21:39, schrieb DK7FC: >>=20 >> R Mal,=20 >>=20 >> Then i would try the TC4426, if you have them at home. And a ferrite tran= sformer to rise the voltage level a bit and to decouple TX from PA. >> https://129.206.22.210:8001/f/80bc50b01d/ for example. >> I also prefer Schmitt-trigger based drivers and rectangular input signals= . >> Just use a scope and watch the output signal of the 4426. Maybe you will n= eed a higher transformation ratio. Or use the ICL7667 if you have one. It ca= n be driven from a 3.3V signal on the input and gives an output sqare wave o= f abt the supply voltage (I use it as a driver between Raspi and my main MF P= A). >>=20 >> 73, Stefan >>=20 >> Am 04.12.2015 19:17, schrieb mal hamilton: >>>=20 >>> Guten Tag Stefan >>> Main amp is a single Decca 5501 module and has a smit trigeer so can tak= e sine or square wave. I use square wave input for Opera and QRSS because of= the divide down from 5 Mhz main VFO. The input to main amp needs around 7 =E2= =80=93 10 volts. At present I use VFO 472 =E2=80=93 479 Khz /4001(SQUARER)/4= 017 DIVIDE BY 10/tc4426 driver to main 5501 amp input >>> =20 >>> 73 de mal/g3kev >>> =20 >>> =20 >>> =20 >>> From: DK7FC >>> Sent: Friday, December 04, 2015 5:07 PM >>> To: rsgb_lf_group@blacksheep.org >>> Subject: Re: LF: WSPR OBSERVATIONS >>> =20 >>>=20 >>> Am 04.12.2015 17:53, schrieb mal hamilton: >>>>=20 >>>> [...] >>>> =20 >>>> When I get time I will QRO but need to build an intermediate RF amp bet= ween TCVR and main MF amp >>>=20 >>> Which input signal does your main MF amp need? Rectangular? Sine? Which i= nput-Z? Which amplitude? >>>=20 >>> 73, Stefan --Apple-Mail-FB24D8A7-C012-4A4D-8746-11C2EA4E224A Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Tnx ur suggestions 
I d= o not have a 7667
De mal /g3kev


Sent from my iPh= one

On 4 Dec 2015, at 20:44, DK7FC <selberdenken@posteo.de> wrote:

PS: Watch the duty cycle of the output signal. I don't know how accurate it has to be for that PA. Maybe you'll need another amp stage in front of the 4426 and anti-serial Z-diodes. Or an op amp stage... There are several methods as i said :-)
73

Am 04.12.2015 21:39, schrieb DK7FC:
R Mal,

Then i would try the TC4426, if you have them at home. And a ferrite transformer to rise the voltage level a bit and to decouple TX from PA.
https://129.206.22.210:8001/f/80bc50b01= d/ for example.
I also prefer Schmitt-trigger based drivers and rectangular input signals.
Just use a scope and watch the output signal of the 4426. Maybe you will need a higher transformation ratio. Or use the ICL7667 if you have one. It can be driven from a 3.3V signal on the input and gives an output sqare wave of abt the supply voltage (I use it as a driver between Raspi and my main MF PA).

73, Stefan

Am 04.12.2015 19:17, schrieb mal hamilton:
Guten Tag Stefan
Main amp is a single Decca 5501 module and has a smit trigeer so can take sine or square wave. I use square wave input for Opera and QRSS because of the divide down from 5 Mhz main VFO. The input to main amp needs around 7 =E2=80=93 10 volts. At present I use VFO 472 =E2=80=93 47= 9 Khz /4001(SQUARER)/4017 DIVIDE BY 10/tc4426 driver to main 5501 amp input
 
73 de mal/g3kev
 
 
[...]
 
When I get time I will QRO but need to build an intermediate RF amp between TCVR and main MF amp

Which input signal does your main MF amp need? Rectangular? Sine? Which input-Z? Which amplitude?

73, Stefan

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