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HBR-3 Receiver

A CW Band Receiver covering 80/40/30/20/17/15/12 and 10 Meters. This receiver complements the MOSFET transmitters with good sensitivity, and excellent Dynamic Range. A "Double-Direct Conversion" architecture that can be built progressively , band-by-band.

As the name implies, this is my third multi-band CW receiver project. The first two where good, but this third design takes on as many of the deficiencies that the first two receivers had. The result of about 2 years effort to get it right.

1. The Front-End  is simple and reproducible. Adequate low noise for each HF band, but with excellent Dynamic Range. HomeBrew DBM's being driven with clean LO's and Bandpass Filters in the RF path.

2. A Product Detector for 80 Meters serves as the IF for the HF DownConverters

3. Most of the receiver gain is in the Audio Assembly. This Audio Chain produces very nice sounding audio with no ringing, but with ample selectivity. 
This is a simple all-Analog design made from commonly available parts.

Qucs/Asco---New Versions! Qucs Asco 0.4.9   New! 4 August 2014
The Quite Universal Circuit Simulator packaged with the ASCO optimizer. A great program for electronic design. RF/Microwave, transient,DC,AC and harmonic balance analysis. These Programs are created by the Qucs and Asco teams at Sourceforge.org and is compiled and packaged together by me (WN2A) for use on Slacko Puppy Linux, a great Linux distro!

Added more Schematic Examples and this version added excellent documentation. Keep in mind: This is not a released version, it is a Snapshot Build.

AK2F/WN2A Beacon

On 28.2082 MHz Running ~ 4 Watts now into a A-99 Vertical From Budd Lake, NJ, USA. On the Air Since April 1997; same 10 Meter MOSFET Transmitter      Status:  On the Air! Reports??

Homebrew CW Transmitters-MOuSeFETS
The originals still work, just like they did 20+ years ago! Download the pdf with all the current revisions.
Now at Rev 7... Great VFO Stability and More Improvements. Better Documentation. Updated: 4 July 2016.

Charger For 12 volt SLA Batteries
A simple "triple-mode" charger for sealed lead-acid batteries.
You can use that 18~20VDC Laptop Charger now, instead of a harder to find 15VAC Wall-Wart.
Updated 29 July 2016.

Dual-Band Power Amplifier
For 146 and 440 MHz Amateur use. Works in-line with your HT rig. Auto Band-Switching. Uses LDMOS Transistors for good gain, great VSWR tolerance and more. No relays, uses PIN diodes!
Not a beginner's project-- for the RF experienced type.


 A Sensitive Low-Cost Frequency Counter with 500 MHz capability. Very Inexpensive Parts List. The Source Code is available under GNU GPL3.

YALP: Yet Another Link Page

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Last Update: 14 December 2017        COPYRIGHT 2009-2017 WN2A