Summary of Contents for Kanga Products URMSTON
- Page 1 The GQRP Regen Receiver Project Construction Instructions GQRP / Kanga Regen construction manual V1.11 Page 1 of 12...
- Page 2 Notes to the builder Check Before you Solder! It is important to get the electronic components in the right places for the circuit work properly and changing them after you have soldered them can be difficult. So, check and double check that you have the right part in the right place before you solder it in place. Once each part is soldered in place, tick off the check box so you do not forget where you are up to. All components Each component is given a grid reference in red (e.g.) (F2) Use this reference with the silk screen map included in these instructions to correctly locate the component placement, double check component alignment. Capacitors Pay close attention when fitting the capacitors. Electrolytic capacitors (larger cylindrical bodies) need to be installed the correct way around. Each Electrolytic capacitor has a white stripe down one side. This is the negative and needs to be aligned with the (-) on the circuit board. The positive lead is a little longer too. Headphone Socket Installing the headphone socket may require some tape to hold the component in place while soldering. Use the tape to hold the socket while you make the 1 solder connection. Potentiometers Wire each potentiometer in the same way as shown in the diagram. LIN pots are marked with a “B” and Log pots are marked with an “A” Variable Capacitor Attach the varicap with pins pointing down. Solder the centre pin to the front panel and solder the black wire the same location. use the pin closest to the Volume control- Solder the white cable to this point.
- Page 3 Part 1. Hardware Construction Front Panel Component Task Complete TUNE Fit Varicap to panel & Install knob VOL Fit 10k LOG (A) Pot to panel & Install knob REGEN Fit 10k LIN (B) Pot to panel & Install knob FINE TUNE Fit 100k LIN (B) Pot to panel & Install knob ATTEN Fit 10k LOG (A) Pot to panel & Install knob Cut Red, Blue & Green wire to approx. 6cms and solder to VOL pot (See Notes to the builder) Cut black & white wire to approx. 6cms and solder to Varicap (See Notes to the builder) Cut Red, Blue & Green wire to approx. 8cms and solder to FINE pot (See Notes to the builder) Cut Red, Blue & Green wire to approx. 10cms and solder to REGEN pot (See Notes to the builder) Cut Red, Blue & Green wire to approx. 6cms and solder to ATTEN pot (See Notes to the builder) (C5) Tune Connection (See Notes to the builder) (I1) Power connection (See Notes to the builder) (I4) Speaker connection (See Notes to the builder) (A4) Attenuation (See Notes to the builder) (B1) Fine Tune (See Notes to the builder) (C1) REGEN (See Notes to the builder) (F5) Volume connection (See Notes to the builder) (A5) & (H5) Install with the flat surface facing forward to allow the attachment of the front panel. Don’t attach panel yet GQRP / Kanga Regen construction manual V1.11 Page 3 of 12...
-
Page 4: Part 2. Power Supply
Part 2. Power Supply Construction Component Task Complete (H2) Fit 22Ω (Coloured ). Solder in place Red, Red, Black, Gold (G1) Fit 7808 Voltage regulator. Centre pin bent back. Check Orientation. Solder in place (E1) Fit Capacitor. Marked 10uF. Solder in place (See Notes to the builder) Check Orientation (H1) Fit Capacitor. Marked 100uF. Solder in place (See Notes to the builder) Check Orientation (H1) Fit 100nF Capacitor. Marked 104. Solder in place. (F1) Fit 10nF Capacitor. Marked 103. Solder in place. (B1) Fit 10nF Capacitor. Marked 103. Solder in place. (A0) Antenna Socket (See Notes to the builder) (B4) Coil GQRP / Kanga Regen construction manual V1.11 Page 4 of 12... - Page 5 Part 2. Power Supply Testing Your circuit should now look like this. Complete the following tests before moving onto the next stage. Test Complete Check over your soldering. Make sure all wires are trimmed, and no short circuits are present. Connect a 9v battery to the battery snap and connect the battery lead to the POWER Molex connector on the PCB Measure between pins 6 and pin 4 of IC (G4) that you have 9 Volts Measure across C1.(B1) Ensure you have 8 Volts Disconnect the battery. Move onto Part 3 GQRP / Kanga Regen construction manual V1.11 Page 5 of 12...
- Page 6 Part 3. The Audio Amplifier Construction Component Task Complete (G4) Fit 8 pin IC Socket Check Orientation. (G4) LM386 - Check Orientation. you may need to squeeze the pins in gently so they fit the socket (H4) Fit 10Ω Resistor (Coloured ). Solder in place brown, black, black, Gold (G3) Fit Capacitor. Marked 10uF. Solder in place (See Notes to the builder) Check Orientation (H4) Fit Capacitor. Marked 100uF. Solder in place (See Notes to the builder) Check Orientation (F2) Fit Capacitor. Marked 10uF. Solder in place (See Notes to the builder) Check Orientation (H2) Fit Capacitor. Marked 100uF. Solder in place (See Notes to the builder) Check Orientation (F3) Fit 100nF Capacitor. Marked 104. Solder in place. (G4) Fit 100nF Capacitor. Marked 104. Solder in place. (F4) Fit 10nF Capacitor. Marked 103. Solder in place. (I3) Headphone Socket GQRP / Kanga Regen construction manual V1.11 Page 6 of 12...
- Page 7 Part 3. The Audio Amplifier Testing Your circuit should now look like this. Complete the following tests before moving onto the next stage. Test Complete Check over your soldering. Make sure all wires are trimmed, and no short circuits are present. Connect a 9v battery to the battery snap and connect the battery lead to the POWER Molex connector on the PCB Connect either headphones or a speaker to the PCB With a screwdriver touch the middle pin of the Molex connector marked “VOL” (F5) Ensure you can hear a buzz Connect VOL connector from front panel and again touch middle pin. Ensure the volume control makes buzz louder & quieter Disconnect battery. Move onto Part 4 GQRP / Kanga Regen construction manual V1.11 Page 7 of 12...
- Page 8 Part 4. The Demodulator & Oscillator Construction Component Task Complete (D1) Fit 15KΩ (Coloured ). Solder in place Brown, Green, Orange, Gold (D4) Fit 3.3KΩ (Coloured ). Solder in place Orange, Orange, Red, Gold (C4) Fit 47KΩ Resistor (Coloured ). Solder in place Yellow, Violet, Orange, Gold (A2) Fit 1MΩ (Coloured ). Solder in place Brown, Black, Green, Gold (C2) Fit 10KΩ (Coloured ). Solder in place Brown, Black, Orange, Gold (C3) Fit 22kΩ (Coloured ). Solder in place Red, Red, Orange, Gold (D2) Fit 270Ω (Coloured ). Solder in place Red, Violet, Brown, Gold (A3) Fit IN4001 Check Orientation. Solder in place (D3) Fit 2N3904 Centre pin bent back. Check Orientation. Solder in place (B3) Fit 10pF Capacitor. Marked 10 or 10p. Solder in place. (B2) Fit 10nF Capacitor. Marked 103. Solder in place. (A2) Fit 10nF Capacitor. Marked 103. Solder in place. (C3) Fit 33pF Capacitor Marked 33. Solder in place.
- Page 9 Part 4. The Demodulator & Oscillator Testing Your circuit should now look like this. There are no further tests, just follow the next instructions and you are ready to test the completed radio Task Complete Connect Front panel and screw in place using the modesty blocks, Nuts, washers and bolts Connect all the potentiometer cables to the circuit board and double check you have the right lead going to the right Molex plug/socket Connect either a speaker or headphones Connect a wire antenna (60cms of wire will work) Connect a 9v battery to the battery snap and connect the battery lead to the POWER Molex connector on the PCB Use the TUNE / FINE to adjust the frequency of the radio. and adjust the REGEN control to bring the set into oscillation when listening to SSB/CW. Set the TUNE control to half way, using a receiver set to 7Mhz adjust the coil until you can hear the oscillator running on the receiver GQRP / Kanga Regen construction manual V1.11 Page 9 of 12...
- Page 10 Acknowledgements and Further Information About this kit This kit was designed by George Dobbs, G3RJV. The PCB designed by Paul Darlington M0XPD. For a full description of the circuit, see Practical Wireless, April 2015. This instruction booklet was prepared by Dan Trudgian, M0TGN. Test builds using these instructions were carried out by Steve Hartley, Tony Fishpool & Dan Trudgian. A video of the test build construction can be viewed on YouTube here : https://www.youtube.com/watch?v=LZuM3KOGkgg Useful links • GQRP club http://www.gqrp.com/ • Kanga Products http://www.kanga-products.co.uk Buildathons This kit is just one of many kits that the Bath Buildathon Crew have introduced to new radio amateurs, shortwave listeners and people with a general interest in electronics. The Bath Crew run a Buildathon in January of each year to help students on Intermediate training courses in Bath. However, the buildathons are also open to anyone who would like to build a fun radio project. For further information on up and coming buildathons, projects and training for amateur radio both in class and via distance learning, please email Steve g0fuw@tiscali.co.uk GQRP / Kanga Regen construction manual V1.11 Page 10 of 12...
-
Page 11: Circuit Diagram
Circuit diagram GQRP / Kanga Regen construction manual V1.11 Page 11 of 12... -
Page 12: Parts List
Parts List Resistors Capacitors R1 270 C1 10n R2 3k3 C2 10n R3 22k C3 10n R4 47k C4 10p R5 1M C5 33p R6 15k C6 330p R7 10k C7 330p R8 4k7 C8 100n R9 27k C9 10n R11 22 C10 10n R12 10 C11 100n C12 100n Semiconductors C13 10n D1 1N4001 C14 100n IC1 78L08 C15 10u Q1 2N3904 C16 100u Q2 2N3819 C17 100u U$1 LM386 C18 10u C19 100u Coil/Transformer C20 10u L1 SPECTRUM-10K 5u3-L Controls...