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NMØS Ham Can
Announced at OzarkCon 2011
Kitted and Offered For Sale By The Four State QRP Group
The HAM CAN transceiver is the latest offering in minimalist amateur radio
from the Four State QRP Group! The HAM CAN is a crystal-controlled CW
transceiver, delivering 1/2 to 1W transmit power, with enough sensitivity
and selectivity to receive plenty of signals. It does all this with only TWO
transistors!
The “Ham Can” is a minimalist transceiver designed to be very simple and inexpensive,
yet provide good performance. The low cost kit sacrifices nothing in the way of quality.
It features a high quality printed circuit board, low parts count and fast and easy
building. It is an excellent kit for first time builders, and was
chosen as the Build Session kit for OzarkCon 2011. It is also one of two kits chosen for the
2011 ARRL Midwest Division Convention's Buildathon. The other is our AAØZZ EZKeyer
This NMØS design features an innovative power switch. Your straight key plug also
serves as the on and off switch, i.e. Just plugging in the key powers up the rig
automatically.
Designed to be as small as possible and still use through hole parts, it will fit on top of a
3 oz ham snack can, while a 9 volt battery resides inside the can, thus making self
contained portable rig. Brand names with cans this size are Armour, Bryan, Fancy Feast
and probably many others. The builder can enjoy a snack while obtaining the enclosure
:o)
First time builders please note: This kit is not difficult to build. All
parts are thru hole parts, there are NO SMT parts, and all connectors are board mounted
which eliminates point to point wiring. After all the parts are installed it's ready to try out.
Specifications and Design Features
Receiver:
Regenerative crystal-oscillator-filter design
Smooth and easy regeneration control due to 25 turn pot
Direct conversion
Crystal controlled on 7122 kc
Plenty of sensitivity for 40M -
audio stage drives earphones
Amazing QSK, you can hear received signals while you are transmitting!
Transmitter:
Keyed oscillator operating in class C
.5 to 1 watt output into 50 ohms
600 HZ offset to facilitate hearing the other station
Pleasing bell like signal,
click here to hear
Documentation
Assembly Manual
Schematic
Parts List
Board Pictorial courtesy of W9HCZ
G3OTH Review Posted with permission, thank you Russ.
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