Four State QRP Group

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ZZRX-40 Receiver
Designed by Craig Johnson, AAØZZ

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ZZRX-40 Yahoo Group

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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
    Dimensions: 4.5" x 2.5" x 1.75"
    Transmitter: This is a receiver only kit. However a companion transmitter may be developed at a later date.
    Assembly Manual
    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 ZZRX-40 was carefully kitted and shipped by Johnny and Pam Matlock.
Please direct part, build related questions to Johnny
All proceeds from 4SQRP kits are applied toward funding OzarkCon.   Thank you for supporting The Four State QRP Group.

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