CPO3 Code Practice Oscillator Kit
   Your discounted price  $14.75 

DDF1 - Doppler Direction Finder Kit   
  

• Track down jammers and hidden transmitters with ease!

• Elegant and cost effective design thanks to WA2EBY! 

• Solid state antenna switching for "rock solid" performance.

• Convenient LED 22.5 degree bearing indicator.

• Audio Level indicator for trouble free operation.

• Adjustable damping rate, phase inversion, scan enable / disable.

• Complete with home brew "mag mount" antennas and cable, designed for quick set up and operation.

• Utilizes latest high speed CMOS technology for signal conditioning and audio processing!

• Complete and informative instructions guide.

Get in on the fun of radio direction finding (RDF) with this super kit ! The latest in affordable Doppler direction finding equipment, this one even includes the receiving antenna assembly! A must for the "fox hunter" at an unheard of price!

Radio direction finding is a fascinating hobby that has been becoming more and more popular in today's portable world. With intentional jammers and other unknown transmitters becoming more frequent, Doppler DF locators have become the rage with a display that gives you a direct bearing on the location of the transmitter. Pretty neat trick considering you don't need multiple separate receivers at different locations to triangulate on the mystery transmitter. Up to now, directional antennas with a good front to back ratio (such as Yagi's or Quads) were required, and were tough to use. However, it's a little bit impractical to mount a Yagi or Quad to the roof of your car for mobile applications. A much more practical approach to the mobile application is to use four 1/4Wave antennas and the Doppler principal.

The unit includes the Doppler Direction Finder display unit, and all the parts for your own four point, 5 piece magnetic antenna assembly for easy setup and use. Operates on 12VDC, and includes a matching 12VDC power plug for custom integration and connection into your vehicle or portable power supply. Easy to hook up to any FM receiver. Transmitter (the object of your DF'ing) need not be FM, it can be AM/FM or CW. Requires only a connection to your receiver's speaker jack and radio's antenna. The whips can be cut and optimized for any frequency from 130-1000 MHz. Compares most favorably to commercial units costing upwards of $1000.00!

Retail $169.95

Your discounted price  $154.95

DDF1WT - Doppler Direction Finder 

Factory Assembled and Tested    

Retail $269.95

Your discounted price  $249.95

DF1C - Foxhound Direction Finder Kit
  
    

• Pin diode switching of antennas coupled with filters determine direction of source signal and is indicated by a pair of LED's

• Sensitive metering allows easy "zeroing-in" on transmitter!

• Includes automatic T/R switch for easy use of transceivers

• Operates on 9VDC internal battery or external 9-12VDC supply

• Electronic kit, assembly required

Your discounted price  $69.95 

FR146C, FR6C, FR10C, FR220C - VHF Mini-Receiver Kits
    

• Tunes any 5MHz portion of selected receiver band

• Excellent performance, less than 1µV sensitivity

• True Superhet Receiver with sharp ceramic IF filters

• Front panel volume, squelch, and tuning controls

FR6C 6 Meter Mini Receiver Kit    

Your discounted price  $42.95

HR20C, HR30C, HR40C - 20, 30, 40 Meter QRP Receivers

• Sensitivity of approximately one microvolt rivals the big rigs!

• Covers 500 KHz of selected band

• Receives CW, SSB and AM

• Plenty of audio output, drives any speaker or phones

QRP20C, QRP30C, QRP40C - 20,30,40 Meter QRP Transmitter Kits
   

• 4 Transistor circuit, oscillator, RF amp chain, and clean keying stage

• RF output approx 1 Watt (.75W for QRP-20)

• Pi-network output for good matching and harmonic suppression

• Provision for two internal crystals, front panel switching

• VCXO tuning, frequency can be tuned approx 7KHz around xtal freq.

    

20 Watts of Power...Cuts Right Through the QRM!

• Works great with Ramsey QRP rigs, or any other 1-2W transmitter

• Built in T/R relay automatically switches between RX and TX

• Operates all modes...CW, SSB or AM

 PR100 - High Performance 2 Meter Preamp Kit

Here’s the ideal preamp for repeaters, base stations, mobiles, anywhere a selective low noise signal boost is needed. Unlike other preamps thePR-100 features extensive RF filtering to crush intermod before it reaches your radio. Two poles of sharp Helical filtering combined with a 3 pole L-C tank allows only signals of interest to reach your receiver. A low noise microwave bipolar transistor provides an excellent 1 dB noise figure while remaining ruggedly insensitive to static and strong signals. In fact, this preamp is actually included as part of our Weather Satellite receiver system! Preamp is easily configured to be powered via the coax (for mast mount applications) or powered through a separate power cable. Kit is designed to fit snugly into a3" long piece of 1 1/2" PVC pipe with end caps, making an ideal outdoor enclosure. Runs on 9 to 15 VDC . Size: 4"w x 7/8"h x 13/8"d            Your discounted price  $32.95

Put some new ‘ears’ on your rig with one of these hot little preamp kits. Their high gain combined with low noise will improve most any receiver. Fully protected against overload and designed for low current and stable operation they employ high Q tuned circuits which restrict out-of-band signals which can cause intermod blanking and over load of your radio’s front-end. Don’t be misled by GaAs FET claims! The cheap dual-gate FETs (manufactured for TV tuner usage!) used by others just don’t come close to the performance of these preamps designed with NEC microwave transistor devices. Gain is typically 16 to 20 dB and noise figure is 1 dB @ 2 Meters, 1.2 dB @ 220MHz, and 1.4 dB @ 440 MHz. Compact design or easy installation into most any rig. Operates on 12 to 15 VDC . Size: 1" x 3/8" x 1 1/2".

TT7 - Touch-Tone Decoder Kit

Here's the Answer for your DTMF Control Problems!

• Decodes DTMF Touch Tones from telephone, radio, etc.

• 20mA output drives relays, LED's, digital devices, etc.

• Telco CO quality decoder with stable crystal control

• Decodes 0 thru 9, *, #, A, B, C, D

You can strap the TT-7 for detection of any single digit, including the secondary A, B, C, D digits. When the decoder detects the selected digit, it will provide a closure to ground for driving a relay, lamp, sounder, or other such load of up to 20 mA. A commercial central office quality decoder IC chip is used, making the TT-7 extremely reliable, fast and sensitive. You may connect the TT-7 directly across the speaker or detector output on any receiver, and in fact, we even detail how it may be connected directly to a telephone line. We designed the TT-7 to be small enough (about 2 square inches) to fit in many radios for easy installation. If your needs are simply single function remote tone control, the TT-7 is for you. Runs on 5VDC. Size: 1 1/2" x 7/8" x 2 1/4".
Your discounted price  $23.95 

TD1 - Tone Encoder/Decoder Kit

• Encodes and Decodes

• Tunable from 40Hz to 5000Hz

• Extendable down to 10Hz

• Drives any load up to 100 mA

All your tone control needs on a single PC board. Kit will simultaneously decode and/or encode any frequency from 400 to 5000 Hz, (add a small capacitor to go down as low as 10 Hz) Great for PL tones, remote controls, tone burst FSK, anywhere tones are involved. Frequency is easily set with the precision 20 turn trimpot, and the circuit uses a voltage regulator and Mylar cap for the ultimate in stability. Runs on 5 to 12 VDC , will drive up to100 mA load. Size: 1 1/4" x 1//2" x 1 1/2".
   Your discounted price  $9.49 

VS1 - Voice Activated Switch (VOX) Kit

• Directly switches relays or low voltage loads up to 100mA

• Use your voice or noise to control!

Voice activated switch (VOX) kit will provide as witched output when it ‘hears’ sound. Use it to key a transmitter for hands-free PTT, or turn on a tape recorder automatically when people are talking in a room. How about having your hallway or porch lights turn on at a whistle or better yet, the garage lights when you beep the horn. Kit runs on 6 to 12 VDC and drives up to 100 mA load such as a relay, tape recorder motor, or transmitter key line.
Size: 2 1/2 "x 1/2" x 1 1/4".
   Your discounted price  $9.49 

SR2C - Shortwave Receiver Kit

Here’s a complete shortwave radio guaranteed to inspire awe in any listener. Imagine tuning in the BBC, Radio Moscow, Radio Baghdad and other services with just a few feet of antenna. This very sensitive (about a microvolt!) receiver is a true superhet design with AGC and plenty of speaker volume.

Smooth varactor diode tuning allows you to tune any 2 MHz portion of the 4 to 20 MHz frequency range, and the kit conveniently runs on a 9 volt battery (not included). Add our matching custom case and knob set to give your radio a finished, polished look. Amaze yourself and others - see how you can listen to the world on a receiver you built in an evening. Drives any speaker or earphone. Included case measures 5”W x 1½”H x 5¼”D.
   Your discounted price  $43.95