Four State Kit Index


4SQRP Home

The Four State QRP Group is pleased to offer these quality kits to the QRP community. Click the links below for each kit's homepage, which includes design features, specifications, and ordering information. All proceeds go to fund our annual Conference, OzarkCon. Please SCROLL DOWN for all the kits, and thank you for supporting the Four State QRP Group.

NMØS Hi-Per-Mite CW Filter
The HI-PER-MITE is a HIgh-PERformance SMALL audio filter. It is designed to be very versatile, have low parts count, be inexpensive, yet provide outstanding performance. This is a flexible design that can be used as a stand-alone unit driving headphones, earbuds, or speakers, or it can be easily integrated into an existing receiver needing additional CW filtering, see manual for details. (Available now)

NMØS QRPometer Power/SWR Meter
This useful accessory is a highly accurate and easy to use power and swr indicating meter. All components are through-hole for easy assembly, and there NO toroids. It features a digital readout and a silk screened pcb front panel. (Available now)

K8IQY SAVXO Stand Alone VXO.
SAVXO stands for Stand Alone Variable Crystal Oscillator. This is a Super VXO design which has it's origins in the Super VXO of the SS-40 receiver. It is crystal controlled yet combines frequency agility with smooth stable tuning. It is ideal for driving your NS-40 or other crystal controlled transmitter or recever. It can be used on any of the HF bands, and is also a great starting point for a transmitter strip of your own design. (Available now)

K8IQY SS-40 Stable and Sensitive 40M Receiver

The SS-40 high performance receiver is the latest design effort from Jim Kortge, K8IQY. SS stands for "Stable and Sensitive". It exhibits the signature IQY extremely quiet amplifier chain. Disconnect the antenna and the receiver's noise floor is almost undetectable. A matched crystal IF filter provides a steep sided 500 cycle bandpass and outstanding opposite sideband rejection. Covering the 40M QRP "watering holes", a Super VXO provides 25-30 kHZ of smooth stable tuning, with NO PERCEPTIBLE DRIFT, even from a cold start! (Available now)

NMØS Ham Can Minimalist Regen Transceiver

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! 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. (Available now)

K8IQY Magic Box TR Switching System

The Magic Box is a solid state, all electronic, transmit/receive switching system that allows a separate receiver and transmitter to transceive with full (or semi) QSK.   Easy to build and features plug and play connections. An Atmel Microcontroller handles the timing for 5 functions- xmttr keying, xmittr antenna switch, rcvr antenna switch, rcvr audio switch, and side tone oscillator.  It features awsome isolation between your transmitter and receiver. (Available now)


This full featured PIC-based iambic Morse code keyer features 3 memories and very easy use. It has many of the features of the high end keyers while maintaining ease of use. Commands are entered directly rather than scrolling through menus. (Available now)

NMØS NS-40 Transmitter Kit

The NS-40 is an easy to build class E 40 meter transmitter, and is an upgraded version of the overall winner in the FDIM 2008 Homebrew Contest. It is a truly unique QRP transmitter design. NS stands for None Simpler, so this is the None Simpler 40 Meter Transmiter. Why is it called the None Simpler? Because there are only 14 electronic components, and NO TOROIDS or COILS of any kind to wind - NONE! All inductors are incorporated directly on the PC board as etched spirals. (Available now)

These kits are retired, however the documentation will remain available.

Clear Top Tins
Here are the perfect tins to show off and protect your home built projects.  (Sold out and retired)

NB6M HF Test Set
The HF Test Set is a multi-function test instrument ideally suited for the QRP workbench. (Sold out and retired)

NT7S VRX-1 Receiver
A direct conversion receiver for 40 meters, but can be easily modifed for any band from 160 to 10 meters. (Sold out and retired)

KD1JV Tenna Dipper

The "Tenna Dipper" is a low power antenna analyzer and ATU tuning aid.  (Sold out and retired)

KD1JV Power and SWR Meter

The KD1JV Power and SWR meter is a compact RF power and SWR measuring device for use in the shack or in the field.  (Sold out and retired)

K8IQY Enhanced Manhattan Islander Audio Amp

The Enhanced Manhattan Islander Audio Amplifier is perfect for boosting the sound level from your headphone-only QRP rig.  (Sold out and retired)

Four State Dummy Load SMD Starter Kit

The SMD Dummy Load is an easy way to learn SMD soldering techniques and finish with a handy addition to your test bench (Sold out and retired)


Back to the Four State QRP Group home page

June 19, 2010

Web Hosting Visitors