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Weaver method SSB PDF Print E-mail
Written by Hans Summers   
Wednesday, 10 September 2014 03:26
Weaver The Weaver method (also called 3rd method) of Single Sideband reception is a little-used technique in HF receivers (except perhaps in Software Defined Radios architectures). This article is an introduction, some practical experiments with a 10m Weaver method receiver, and a collection of information on the subject.
Last Updated on Wednesday, 18 November 2015 05:12
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Ultimate3S kit PDF Print E-mail
Written by Hans Summers   
Monday, 01 June 2015 03:49
U3S This is my implementation of the QRP Labs Ultimate3S QRSS/WSPR kit. My U3S is installed in the official QRP Labs case. I am using the relay-switched LPF kit for 6-band operation, and QRP Labs QLG1 GPS receiver module.
Last Updated on Sunday, 26 June 2016 09:47
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Simple GPS Freq. Ref. PDF Print E-mail
Written by Hans Summers   
Thursday, 04 June 2015 03:03
GpsRef2 Here's a simple and easy single-chip 10.000000000MHz GPS-disciplined frequency reference, based on a small 14-pin AVR microcontroller ATtiny24. This implements a kind of software "Huff Puff" method stabilisation. It uses an old junkbox 10MHz OCXO. The final accuracy is about 0.5 parts per billion (ppb).
Last Updated on Monday, 10 October 2016 09:48
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OCXO and synthesiser design PDF Print E-mail
Written by Hans Summers   
Monday, 01 September 2014 10:30
OCXO This page documents the design and development of an OCXO and Synthesiser module. There were several motivations for developing this module, partly as a replacement for the popular AD9850 DDS module, available inexpensively on eBay and elsewhere.
Last Updated on Wednesday, 20 May 2015 09:09
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QRP Power meter PDF Print E-mail
Written by Hans Summers   
Wednesday, 21 January 2015 05:09
Weaver It's really simple to make a QRP power meter measuring RF output powers from a few mW up to half a watt. This simple project described here is half an hour's work and all components are from the junk box. I used an old "VU" meter from an old piece of consumer equipment, probably a 70's Hi Fi or something similar, long-since forgotten.
Last Updated on Wednesday, 20 May 2015 09:04
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