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=-0.4 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_50_60,HTML_MESSAGE,NORMAL_HTTP_TO_IP,RATWARE_GECKO_BUILD 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 tB4KmLdk012772 for ; Fri, 4 Dec 2015 21:48:21 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1a4xEU-0002kW-Ja for rs_out_1@blacksheep.org; Fri, 04 Dec 2015 20:45:34 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1a4xEU-0002kM-75 for rsgb_lf_group@blacksheep.org; Fri, 04 Dec 2015 20:45:34 +0000 Received: from mout01.posteo.de ([185.67.36.65]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.86) (envelope-from ) id 1a4xDL-0001lc-Ri for rsgb_lf_group@blacksheep.org; Fri, 04 Dec 2015 20:45:33 +0000 Received: from dovecot03.posteo.de (dovecot03.posteo.de [172.16.0.13]) by mout01.posteo.de (Postfix) with ESMTPS id 0E6CD20B20 for ; Fri, 4 Dec 2015 21:44:08 +0100 (CET) Received: from mail.posteo.de (localhost [127.0.0.1]) by dovecot03.posteo.de (Postfix) with ESMTPSA id 3pC5c76TWPz5vND for ; Fri, 4 Dec 2015 21:44:07 +0100 (CET) Message-ID: <5661FB17.9050507@posteo.de> Date: Fri, 04 Dec 2015 21:44:07 +0100 From: DK7FC User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <5661C842.3090706@posteo.de> <44ED7091893D488A8C3B235DF1EB31BD@malPC> <5661FA19.8080808@posteo.de> In-Reply-To: <5661FA19.8080808@posteo.de> X-Scan-Signature: d5ac66e7920295f519efeb68ecc59e6f Subject: Re: LF: Re: WSPR OBSERVATIONS Content-Type: multipart/alternative; boundary="------------000800000302070308050407" 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: 5554 This is a multi-part message in MIME format. --------------000800000302070308050407 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit 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/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 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 – 10 volts. At present I use VFO 472 – 479 Khz >> /4001(SQUARER)/4017 DIVIDE BY 10/tc4426 driver to main 5501 amp input >> 73 de mal/g3kev >> *From:* DK7FC >> *Sent:* Friday, December 04, 2015 5:07 PM >> *To:* rsgb_lf_group@blacksheep.org >> *Subject:* Re: LF: WSPR OBSERVATIONS >> >> Am 04.12.2015 17:53, schrieb mal hamilton: >>> [...] >>> 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 >> --------------000800000302070308050407 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit 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/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 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 – 10 volts. At present I use VFO 472 – 479 Khz /4001(SQUARER)/4017 DIVIDE BY 10/tc4426 driver to main 5501 amp input
 
73 de mal/g3kev
 
 
 
From: DK7FC
Sent: Friday, December 04, 2015 5:07 PM
Subject: Re: LF: WSPR OBSERVATIONS
 

Am 04.12.2015 17:53, schrieb mal hamilton:
[...]
 
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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