EA3GCY EGV-9B v1 Assembly Manual Download Page 34 | Manualshive

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EGV-9B

80 to 10m QRP CW Transceiver Kit

Page 34

SCHEMATICS

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Summary of Contents for EGV-9B v1

Page 1: ...QRP CW Transceiver KIT MAIN BOARD Assembly manual Last update March 01 2023 ea3gcy gmail com Latest updates and news in www ea3gcy com Thank you for building the EGV 9B v1 80 to 10m QRP CW Transceive...

Page 2: ...of the EA QRP CLUB On September 1994 a group of four hams Miguel Montilla EA3EGV Miguel Molina EA3FHC Vicen Llario EA3ADV and myself Javier Solans EA3GCY founded the EA QRP EGV 9B The EGV 9B is the ev...

Page 3: ...enuator UP DOWN band switches Board dimensions 180 x 140 mm Weight no enclosure 0 35 kg TRANSMITTER Mode CW direct frequency without heterodyning or mixing RF output 3 to 6W 13 8V depends on band Outp...

Page 4: ...ck orange 1 22K R51 red red orange 5 100K R26 R28 R29 R30 R42 brown black yellow 2 220K R31 R38 red red yellow Potentiometers list 2 100 Adjustable RM 063 P6 P7 103 2 10K Adjustable RM 065 P1 P2 101 1...

Page 5: ...5234 1 BY255 D3 BY255 RF Transformers Relays Qty Part Value Checked Ref Identified 2 FT37 43 L1 L2 black toroid 1 Huigang relay RL1a b Huigang HRS2H 12V 1 Omron relays RL2 Omron G5V 1 12V Connectors a...

Page 6: ...her to Q3 screw 2 M3x10 screw 10mm M3x10 screw to Q5 and Q6 and LPF BPF board 10 M3x4 screws 4mm M3x4 screws 12 M3 nuts M3 nuts 2 M3 washer Metal M3 washer to Q5 and Q6 6 M3 spacers Hex 10mm M3 spacer...

Page 7: ...Driver J 2 R23 22 red red black Driver J 5 R24 22 red red black Output Amp H 3 R25 10K brown black orange AGC C 12 R26 100 K brown black yellow AGC D 12 R27 1K brown black red AGC E 12 R28 100K brown...

Page 8: ...00 adjustable 101 RM 063 Sidetone Headphones A 7 Encoder ENCODER PEC16F PEC16 4015F Encoder ATMEGA328P R 7 Capacitors Checked Ref Value Ident Comment Circuit section Located printed 100 100n 47 All pr...

Page 9: ...L 4 IC3 LM386 LM386 Sidetone N 2 IC4 78L05 78L05 AGC G 13 IC5 NE602 NE602 or SA602 RX mixer L 8 IC6 NE602 NE602 or SA602 CW Dem N 10 IC7 UA741 741 Audio Premp K 11 IC8 LM386 LM386 AudioAmp M 13 IC9 C...

Page 10: ...EGV 9B 80 to 10m QRP CW Transceiver Kit Page 10 252 QUADRANT COMPONENT LAYOUT MAP...

Page 11: ...the volume potentiometer that will be wired later when the board is finished Refer to the parts list and select the first resistor R1 Bend the leads as close to the component body as possible otherwis...

Page 12: ...EGV 9B 80 to 10m QRP CW Transceiver Kit Page 12 There are three specific type diodes D1 is a 47V zener diode D2 is 6V2 zener diode D3 is a BY255 diode 1N4148 diodes location map...

Page 13: ...apacitors location map below C11 and C13 they are electrolytic miniature capacitors so that its height does not touch the filter plug in board The values which are in decade increments can be easily c...

Page 14: ...EGV 9B 80 to 10m QRP CW Transceiver Kit Page 14 100n capacitors location map...

Page 15: ...sert and hold the header in place using a jumper placed on the header while you solder the pins to avoid burning your fingers Use your other hand to hold the soldering iron and move the board towards...

Page 16: ...ulator sheet that you will find in the kit and trim it 1 2mm every side so that it seats well within the heatsink Q6 2SC1969 Mount Q6 TX power amplifier onto the heatsink as shown in the image This tr...

Page 17: ...the metal case through the 6mm hole In that case place the Q6 under PCB and the radiator from the kit is not used Integrated Circuits The component outline for the IC on the circuit board has a U shap...

Page 18: ...t has a 10 turn primary and a 3 turn secondary Take 16 17cm 7 5 of 0 5mm diameter enameled wire and wind ten 10 turns on a black FT37 43 toroidal core Spread the turns evenly around the entire toroid...

Page 19: ...toroid with 9 5mm 0 375in outer diameter is used It has 8 8 turns Cut a 30 31cm 12 long piece of 0 5mm diameter enameled wire Bend the wire in half Twist it so that there are two twists per cm 16cm 32...

Page 20: ...o be prepared in this manner before soldering them into the board Using a multimeter in its ohm or continuity function locate and mark the ends identifying them as a a1 and b b1 Mount the toroid into...

Page 21: ...dule The IF crystal filter is mounted on a plug in board This allows for easy experimentation Also in the future you can exchange other filter modules with different characteristics The PCB and compon...

Page 22: ...y with the board as shown in the images IC13 OLED 1 3 display This is the display for the EGV 9B It may be best not to place it to the end Before placing it you must think and be sure how to install t...

Page 23: ...le the ATMEGA328P module follow the following order Solder the 28 pin IC socket You must make sure to place it in the correct direction according to the silhouette printed on the board Solder the two...

Page 24: ...EGV 9B 80 to 10m QRP CW Transceiver Kit Page 24...

Page 25: ...s The EGV 9B circuit board incorporates the power antenna headphone and external speaker and headphone jacks and speaker headphones switch Optionally you can connect an ON OFF switch instead of jumper...

Page 26: ...ee the image You have to wire the connections R GND L and CMD Note You can use a different connectors system You can use another Jack socket type and another push button To understand how the KB2 keye...

Page 27: ...nductive tape aluminum or copper may be suitable There is a custom box for the EGV 9B in www qrphamradiokits com The EGV 9B is protected against possible polarity reversal faults by means of diode D3...

Page 28: ...t A bad speaker will spoil the quality of the reception Apply power remember J1 jumper plugged The screen should light up and show the main menu See EGV 9B Settings User manual Turn the volume to maxi...

Page 29: ...he potentiometer clockwise Note We recommend that you adjust L5 and L6 for 20m do not re adjust L5 and L6 on the other bands You will notice that on the higher bands the adjustment of L5 and L6 can be...

Page 30: ...the display shows the proper signal level Normally P4 will be adjusted to its three quarters Note The displayed signal level is for guidance only They are not precise levels It is not a calibrated ci...

Page 31: ...reduce the receiver sensitivity enough for the AGC to work easily and the signals to be heard comfortably Then you can increase the volume control When broadcast signals near the amateur bands are str...

Page 32: ...S 0 level and don t bother reception much However there are some very strong ones that can disable the reception of the signal from the station that is on that exact frequency This is inherent in the...

Page 33: ...s documentation and used correctly according to all provided instructions It is your responsibility to follow all the instructions in the manual to identify all the components correctly and to use goo...

Page 34: ...EGV 9B 80 to 10m QRP CW Transceiver Kit Page 34 SCHEMATICS...

Page 35: ...EGV 9B 80 to 10m QRP CW Transceiver Kit Page 35...

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