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Kitted and Offered For Sale By The Four State QRP Group
This simple receiver demonstrates how very few components can be assembled to make a functioning and usable HF receiver. Many receivers of similar design have been built from scratch and and kits. But the ZZRX-40 has a few wrinkles that the others may not.
• Incorporated into the design is the ability to easily choose an on board VXO or LC VFO - or an external VFO of your choice, DDS, Super VXO, homebrew, etc. The ZZRX-40 is the perfect proving ground for whatever VFO that you have, or wish to build.
• The kit also includes AAØZZ's excellent silk screened and drilled enclosure design. Refer to the photo page for details.
• There are NO SMT parts to install, only through hole parts are used, making this an easy kit to build. After all the parts are installed it is complete and ready to try out.
• No alignment is required and it may be put on the air immediately after the last part is installed.
Clubs and Group Builders Please Note! Craig has created an excellent manual that is geared toward group builds. As you build you will notice that it is a nice educational document, well written, and easy to understand. Members of the Minnesota Amateur Radio Technical Society built 20 kits from the manual, as did 17 members of the Midland Michigan ARC, and all worked perfectly upon completion.
All Clubs and Group Builders will receive a quantity discount, 5 kit minimum order required.
Specifications and Design Features
VFO Choice: On board VXO or LC oscillator - or external VFO of your choice (easy connection)
No Aligment Required: Just install the parts then put it on the air immediately.
Design: NE602/LM386 topology, simple and effective.
Power Supply: Built in battery pack or 12 to 14v bench supply.
Current Requirement: 15 ma.
Enclosure: Attractive silk screened, pre-drilled, and easy building PCB enclosure is included in the kit
4.5" x 2.5" x 1.75"
This is a receiver only kit. However a companion transmitter may be developed at a later date.
Board Layout Part Location
Part List BOM
Photo Page Rig pix and building tips.
AA0ZZ's Article in QST Posted with the permission of the ARRL. Copyright ARRL.
Further reproduction or distribution is prohibited.
Ham Nation's K7AGE YouTube build videos Posted with permission.
JL1HID's YouTube Video Posted with permission, thank you Koji.
JL1HID's YouTube Video-ZZRX-40 with DDS VFO Posted with permission, thank you Koji.
Elecraft's Excellent Capacitor Identification Page Posted with permission.
Electronics 2000's Excellent Resistor Code Graphic Calculator Posted with permission.
The cost of this kit is $45, plus shipping. The PayPal buttons below include shipping costs for the US and Canada. Due to large increases in all other DX shipping costs - for all DX orders, except Canada, please contact the kitter for actual total price.
If paying by check or money order (US dollars only) please make it out to "Four State QRP Group" and send to:
Tom Brown WØMFQ
PO Box 627
St. Charles, MO 63302
The ZZRX-40 is carefully kitted and shipped by Johnny and Pam Matlock.
Please direct DX shipping cost, kit availability, part related questions to Johnny
All proceeds are applied toward funding OzarkCon.   Thank you for supporting The Four State QRP Group.