EA3GCY DB4020, Assembly Manual

Page: 10 / 40

DB4020 Dual Band 40&20M SSB QRP Transceiver Kit Page 10
LIST OF INDIVIDUAL COMPONENTS
Resistors
Checked Ref. Value Ident./Comment Circuit section Located
R1 470 Ω yellow-violet-brown Microphone input N-2
R2 47K yellow-violet-orange SSB gen balance M-2/3
R3 47K yellow-violet-orange SSB gen balance M-4
R4 10K brown-black-orange Mic supply N-1
R5 4K7 yellow-violet-red Mic. Supply N-1
R6 22 Ω red-red-black IC1 supply L-2/3
R7 470 Ω yellow-violet-brown IC1 and IC2 supply K-1
R8 22 Ω red-red-black IC2 supply M-4
R9 4K7 yellow-violet-red Pre-driver L-4/5
R10 100 Ω brown-black-brown Pre-driver K-4/5
R11 1K brown-black-red Pre-driver L-4
R12 100 Ω brown-black-brown Pre-driver L-4
R13 100 Ω brown-black-brown Pre-driver K-2
R14 1K brown-black-red Driver J-2
R15 100 Ω brown-black-brown Driver J-1/2
R16 4K7 yellow-violet-red Driver J-3/4
R17 330 Ω orange-orange-brown Driver J-1/2
R18 22 Ω red-red-black Driver J-4/5
R19 1K5 brown-green-red Output Amp bias H-3
R20 470 Ω yellow-violet-brown Output Amp G/H-2
R21 No used -- BPF H-5
R22 1K brow-black-red BPF H-7
R23 100K brown-black-yellow AGC D-10
R24 1K brown-black-red AGC E-10
R25 100K brown-black-yellow AGC F-10
R26 100K brown-black-yellow AGC F-10
R27 100K brown-black-yellow AGC F-11
R28 220K red-red-yellow AGC F-11
R29 22 Ω red-red-black IC4 supply L-9
R30 470 Ω yellow-violet-brown IC4 and IC5 supply K-9/10
R31 22 Ω red-red-black IC5 supply M-10
R32 1K brown-black-red SSB Dem N-11
R33 1K brown-black-red Audio preamp M-11
R34 10K brown-black-orange Audio preamp K-11
R35 10K brown-black-orange Audio preamp K-11
R36 220K red-red-yellow Audio preamp J-11
R37 100 Ω brown-black-brown IC6 supply J-11/12
R38 10K brown-black-orange Audio Amp M-12
R39 1 Ω brown-black-gold Audio Amp L-13
R40 10 Ω brown-black-black Audio Amp N-13
R41 10 Ω brown-black-black Audio Amp O-13
R42 470 yellow-violet-brown S-Meter K-12
R43 47K yellow-violet-orange S-Meter P-13
R44 4K7 yellow-violet-red S-Meter Q-13
R45 10K brown-black-orange Mute O-12
R46 10K brown-black-orange Mute P-12
R47 10K brown-black-orange Band switch D-13/14
R48 10K brown-black-orange Band switch C-13/14
R49 470 Ω yellow-violet-brown VFO input O-7
R50 10 Ω brown-black-black BFO input O-8
R51 150 Ω brown-green-brown BFO input O-8/9
R52 100 Ω brown-black-brown BFO input O-9
R53 150 Ω brown-green-brown BFO imput O-9
R54 10K brown-black-orange Arduino nano Q-8