Kanga "SMD" Dummy Load £5.95
This is an excellent example of Self Training kit in SMD Soldering. For those who wish to see the original documentation these are still available on the 4SQRP Website http://www.wa0itp.com/dummyload.html. The "Kanga" version is a total SMD component kit and is designed to allow the builder to gain experience in SMD soldering. The advantage being that transmitter testing and tuning can be carried out without radiating a signal, which can cause interference to other band users. Also with the addition of a simple diode detector circuit good accurate power output measurements can be made. (Socket not included in kit, available from Kanga at two for £1.50)
QRSS FSK - CW Beacon 80m and 40m - £11.00
February 2010, Mike G4VSS gave a talk at the Warrington Amateur Radio Club (WARC) on QRSS as a Club Project, he and Paul M0XPD had some success with various homebrew designs and the idea of having a kit for club members to build ensued. Following Paul and Mike's talks, Paul G1DVA set about producing the next WARC project. Starting with the original design, by Hans Summers (G0UPL). Paul modified the design by adding additional features. He finally produced the circuit diagram and PCB. He developed the supporting firmware for a combined FSK, CW QRSS beacon.
For those wishing to find out further information about QRSS click here Des M0AYF has a dedicated website explaining what QRSS is.
Down load the QRSS Beacon construction here
Please state callsign required when ordering your kit.
The "ONER" Stockton Wattmeter - £14.95
"Finningley" 80m SDR RECEIVER - £16.50
This kit was produced for the Microwave Roundtable earlier this year, Kanga Products have kindly been given permission to re-produce the kit here. This simple SMD kit is a great way to get into Software Defined Radio. Download the PDF Manual here
For those who feel that they cannot solder SMD components click here for a video on SMD soldering, including the type of equipment you need. You will be suprised to know that you do not need a great deal more than what you have in the shack.
7 pole Low Pass Filter (Temp out of stock) - £11.95
PCB produced with a solder mask, component positions and connections are all marked,to make assembly easy.
PCB's are still available.
Sudden-2 Receiver: (80m, 40m and 30m ver only) - £28.50
The SUDDEN-2 Direct Conversion Receiver is based closely on the original SUDDEN but with the following differences:
Tuning is by variable capacitance diode, removing the need for an expensive tuning capacitor.
The SA602 mixer/oscillator chip is fed from a 5 volt regulator, so a 9v or 12v supply can be used.
The audio amplifier circuit, based on an LM386, now has hiss-reducing components.
The audio gain control, RF attenuator and tuning control are mounted on the PCB.
The kit is supplied with Toko 10K coils, but the board can also be used with toroidal coils if Toko coils become obsolete. The PCB has a solder mask and the component positions are marked in white screen printing.
There is provision on the board for a switched-bandwidth audio filter and a mute circuit with adjustable sidetone bypass.
The Original SUDDEN Receiver - Temp out of Stock £19.95
PCB's are still available
This is another project from the G-QRP club; a simple Direct Conversion receiver designed by Rev. George Dobbs G3RJV. It is based on the well-known SA602 / LM386 pair of ICs. The input signal is fed through a 1k pot that acts as a variable antenna attenuator and then to a two-stage bandpass filter using Toko coils. The signal is then fed to the SA602 mixer/ oscillator. The recovered audio signal is amplified by the LM386 to drive headphones.
The PCB is shown here with the optional tuning capacitor fitted. The input attenuator and volume control, not shown, are included in the kit.
This kit has been built by children as young as eight (with supervision) and is therefore suitable for the complete beginner. There is very little setting-up to be done. The Sudden is available for the amateur bands of 160m, 80m, 40m, 30m and 20m. The original variable capacitors for which this kit was designed are in short supply and are also expensive Any good-quality capacitor of about 30pF to 50pF will do. Email us to see if we still have a suitable one in stock normally costing approx £3.00 - £3.50 each
The Foxx-3 Transceiver (80m, 40m, 30m, 20m versions available) - £29.95
Connections are as follows: antenna via 50 ohm BNC, power via 2 pin 0.1" header, headphones via 3.5mm mono or stereo jack plug or 2 pin header, Morse key via 3.5mm mono or stereo jack plug or 2 pin header. We also supply a small PCB-mounted switch which can be used as the key for ultimate portability.
Add on Amp - £11.50 (Suitable for the Intermediate Course)
This audio amplifier is based on the popular LM386 integrated circuit from National Semiconductor. It is intended to be used as a standard audio output stage for receivers, needing only a DC supply of 4 to 12 volts and an 8 ohm loudspeaker or low-impedance headphones.
Connections are made via five terminal pins along the back edge of the board. The amplifier is mounted via the volume control bush in a 10mm panel hole.
Junk Box Special (JBS) - £17.95 (Temp out of Stock) PCB's still available @ £2.50 each
A small CW transmitter from the famous George Burt GM3OXX of Edinburgh, Scotland. This unit will work on any band from 3.5MHz through to 24MHz (where the output is very low). Providing up to 7 watts output on the lower bands. Normally supplied with an 80m crystal, if a different band require please email.
The "Apell" Budget Key/TX - £11.95
This is another unit from the pages of SPRAT, the journal of the G-QRP Club. Designed by Johnnie Apell SM7UCZ. Supplied with 80m crystal (3.579), other bands can be provided but you will need to change BPF.
Kanga Iambic Keyer - £14.95 - (Limited stock, email to avoid missing out on this great little kit)
This is the orignal CMOS keyer built on a PCB of just 3in x 2.25in. This unit has full dot/dash memories and will run for a year on a single PP3 battery. It has an on-board speed control which can be replaced by a front-panel control. With simple mod to the PCB, this will fit the Famous Altoids Mint Tin.
The RF Actuated T/R Changeover - £6.95
A MOSFET is used to drive a relay which is energised when RF is detected on the transmitter's output. The relay has two changeover contacts, one wiper going to the antenna and the other to the transmitter. The line from the transmitter passes through a step-up transformer made from a small ring core. RF induced in the secondary of this transformer is rectified and used to turn on the relay drive transistor.
In the "receive" condition the receiver is connected to the antenna and the transmitter is connected to a 50 ohm resistive load. On transmit, the antenna is transferred from the receiver to the transmitter. Back-to-back diodes across the output to the receiver limit the amplitude of the signal reaching the receiver via stray capacitance within the relay.
PSK 31 Interface - £18.50 (Temp Out of Stock)
By popular demand this kit has been re-introduced. The kit comes complete, all that is required is to download the software you are most happy with, which is free and in the public domain.
You will need a RS232 connection on the computer in use, if this does not have one then either RS232 I/O card or a USB to RS232 convertor can be used.