QRP kits by Breadboard Radio are Easy to Build and Fun to Use!


The “Splinter II” QRPp Receiver / Transmitter

Like the original Splinter...only better!  Here’s what you get:

1. 40 meter DC receiver with improved audio.

2. Sidetone volume is now variable.

3. Higher RF output with cool running final (450-550 mw).

4. New switching transistor allows use of electronic keyers.

  1. 5.Great new VXO is easy to use and pulls HC-49

    crystals 5 to 7 kHz!

7. Spot switch for zero beating.

8. Reliable send/receive switch.

9. Built-in key and external key jack.

  1. 10.Builder finished wooden base.

  2. 11.Easy Alignment

  3. 12.RX tunes about 100KHz...user selectable

  4. 13.7030 KHz crystal included

  5. 14.Easy to build...even more fun to use!

  6. 15.No price increase!

This kit is mounted on a wooden breadboard painted as you like before mounting the double sided, solder masked and screen printed circuit board.  All parts, circuit board, knobs, decals, breadboard and complete instructions are included for only $49.95

The “Toothpick” Audio CW Filter / Amp

  1. 1.Variable bandpass helps peak desired signal

  2. 2.Audio amplifier will drive a small speaker

  3. 3.In / out switch

  4. 4.Use with phones or speaker

  5. 5.Will work with other qrp rigs and older receivers

  6. 6.Measured peak bandpass 700 to 1000 Hertz

The  price is only $24.95.

Over 458 Splinters are operating in 18 countries and on all continents!

Best reported DX...11,028 miles per watt!

toothpick instructions.pdfProducts_files/toothpick%20instructions.pdfProducts_files/toothpick%20instructions_1.pdfshapeimage_6_link_0

The “Sawdust” Regen Receiver / CPO

  1. 1.Tunes about 100 KHz in 40 meter band or anywhere between 5 to 8 MHz (approximately)

  2. 2.CW, SSB and AM

  3. 3.Plenty of audio for earphones or small speaker

  4. 4.Also functions as a code practice oscillator...just connect a key!

  5. 5.Fixed regeneration

  6. 6.Works with “Toothpick” CW Filter if desired

  7. 7.Easy build kit

  8. 8.Option #1 Build as original or with just one jumper, key jack becomes mute and sidetone input

  9. 9.Option #2 Add one resistor (included) and change tuning range to 25 KHz (more bandspread)

Prototype Picture

The price is still only $24.95. 

Splinter DX videohttp://www.youtube.com/watch?v=Vbm-112qoqM
Large ImagesProducts_files/Large%20Images.pdf
Splinter II SchematicProducts_files/Splinter%20II%20Schematic.pdf

The Matchstick Antenna Tuner

1. 40 meter QRP transmatch

  1. 2.Built-in resistive SWR bridge with LED indicator

  2. 3.Works with most antennas

  3. 4.Simple series/parallel capacitor with toroid design

  4. 5.Build it in one evening

  5. 6.Easy to use

The  price is only $24.95.


The Wood Stain QRP

Dummy Load / R.F. Probe

  1. 1.50 ohm resistive dummy load

  2. 2.Built-in R.F. Probe allows watt meter function when connected to a voltmeter

  3. 3.Easy to build

  4. 4.Low cost

  5. 5.Accurate at QRP & QRPp power levels

Only $19.95

Wood Stain Instructions.pdfProducts_files/Wood%20Stain%20Instructions.pdf
Splinter II InstructionsProducts_files/Splinter%20II%20Instructions.pdf
Splinter II Pedestrianhttp://youtu.be/rxb-urOu_SIhttp://youtu.bhttp://youtu.be/rxb-urOu_SIe/rxb-urOu_SIshapeimage_22_link_0

The USPS has made significant price increases for small packages.

I am absorbing $1.15 ON CURRENT ORDERS.  In March I will start mailing by first class mail instead of priority.  This will actually keep what you pay close to or less than current cost on most items.  

Thanks and 73, Bill W4FSV

Time Lapse Splinter II Buildhttps://youtu.be/y72ARGfFeYw

Code Practice Oscillator

Here is our new code practice oscillator.  It is 2.5 by 2.5 inches and has a built-in key and external key jack.  The 9 volt battery clips on and is mounted on the board. Has a 1.5 inch speaker and plenty of volume.  Our CPO uses a Twin Tee oscillator circuit that produces a pure sine wave that sounds better than most sawtooth oscillators like those using a 555 timer chip.    The price is $24.95


Our most popular kit is better than ever!  Same size and performance as the original plus two new built-in options

for using with a transmitter.  Build it like the original or for receive/transmit use...you decide.

Sawdust SchematicProducts_files/sawdust%201.jpeg
Sawdust ManualProducts_files/sawdust.pdf