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HR40 • 4
INTRODUCTION:
Our HR40 and HR80 models are thought of as “best for beginners” because
Hams with a Novice or Technician licenses can operate CW in the 80 and 40
meter bands. If you like plenty of action and DX (long distance)
communications, the 40 meter Ham band is the place to be. Almost 24 hours
a day there’s something interesting happening on 40 meters.
These are several groups of people who will enjoy this Ramsey HR40
Receiver:
• Experienced Ham operators who want a simple extra receiver for keeping
one ear on 40 meters while doing something else.
• Beginners who would like to start by listening in on one of Ham radios
most active bands.
• QRP builders who want a quick, easy and reliable SA602 board kit for 40
meter projects.
• QRP builders not interested in our warranty or following our step-by-step
assembly and use directions, but who want to get their hands on our most
versatile receiver PC-board and parts kit for their own projects.
The Ramsey HR40 has something fun and easy for each of them.
Note To Beginners: Building the HR40 is really no harder than any of our other
receivers in this series. Just follow the directions carefully. All you need to
know to successfully complete this receiver is contained in this detailed
manual. Enjoy your HR40 receiver.
RAMSEY HR-SERIES AMATEUR RECEIVERS:
All Ramsey Direct Conversion Receiver Kits share the same basic PC-boards
and most components which are not frequency critical. However, there are
enough differences among the band characteristics, desirable operating
features for each band, and differences among the people who would most
typically choose a particular band, that a separate instruction manual is
published for each receiver.
Other circuit details which vary from band to band include the tuning range
provided by the varactor circuit. “Bandspread” for favorite band segments is
easy on 160 or 80 meters but requires other considerations on higher
frequencies. Also, some bands appeal to QRP operators more than others,
and some are better suited for portable and travel use.
Therefore, we are pleased to assure you that your manual for the HR40
receiver and the receiver circuit itself has been designed with an
understanding of typical operating needs and expectations for the 40 meter
band.