2n2/20 - norcal qrp · q16 j176 d20 1n5711 d21 1n5711 k8iqy's 2n2/20, 20 meter cw transceiver...
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1
2N2/20
A 20-Meter Discrete Component CW Transceiver built
Manhattan-style
Designed by: Jim Kortge, K8IQY(jokortge@prodigy.net)
2
Discussion Topics
Background Transceiver Features and Performance Design Overview Construction Overview Q and A in remaining time
3
Background 2N2/20 derived from 2N2/30 Overcomes weak areas in original
2N2/40 design– 2N2222 contest constraints removed– New circuits for RF T-R, RF Amp, Mixers,
Xtal Filter, Audio Preamp, Rx Mute, & Final Amplifier
– Revised circuits for VFO, Rx Mixer Amp, & IF Amp/Roofing Filter
Project driven by builder interest
4
Features and Performance Receiver
– Electronic attenuator/T-R switch– Double-tuned input filter - 400 KHz BW– “Noiseless” Norton RF Amp– Commercial level 7 DBM– 4+2 pole crystal filters ~ 500 Hz BW– JFET audio mute– 3 audio stages– Varicap tuned VFO - drift < 200 Hz– RIT
5
Features and Performance Receiver (continued)
– Sensitivity (MDS) = -130 dBm– Blocking Dynamic Range = 107 dB– Intermod Dynamic Range = 91 dB– 3rd Order Intercept = 7 dB– IF Rejection = 91 dB– Image Rejection = 73 dB– Opposite Sideband Rejection = 75 dB– Rx Current = 185 ma
6
Features and Performance Transmit
– Commercial level 7 DBM– Double-tuned Cascode RF Amp– 2SC2166 Final Transistor– Settable Output Power - 9 Watts Max– Spurious Output < -50 dBc– Solid State QSK Keying– Tx Current = 735 ma (3.5 watts output)
7
Design Overview
8
VFO Schematic
9
VFO Output Spectrum
10
20 Meter RF Spectrum
11
RF Gain/T-R Switch Sch
12
RF Gain/T-R Switch Resp
13
Input BP Filter Sch
14
Input BP Filter Response
15
RF Amp & DBM Sch
16
PM Amp & Xtal Filter Sch
17
Main Xtal Filter Resp
18
IF Amp Sch
19
IF Amp Resp
20
Roofing Filter – Preamp Sch
21
Audio Preamp Res
22
Rx Mute – Main Audio Sch
23
Main Audio Amp Resp
24
Tx LO & DBM Sch
25
Cascode Amp Sch
26
Driver – LP Filter Sch
27
Tx Output Spectrum
28
Construction Overview
Manhattan-style construction 5 X 7 inch substrate footprint Sub-modules used where advantageous Custom case KD1JV frequency readout Digital photo documentation
29
RIT & RF Gain Modules
30
Substrate Layout
31
VFO
32
RxTx Switch - DBM
33
PM Amp – Prod Det
34
Audio Preamp – Main Amp
35
Receiver Overall
36
Tx LO – Cascode Amp
37
Driver – LP Filter
38
Transmitter Overall
39
Packaged 2N2/20 - Front
40
Packaged 2N2/20 - Rear
41
Question/Answer
What did you not understand? What item(s) need more discussion?
Rx/Tx
Rx RF
Rx Mixer
Switch
Amp
Tx FinalTx DriverTx Cascode Amp
Tx Mixer
Tx LO
VFO
Xtal Filter & Post-mixer Amp
Prod Det
Rx LO
Rx Audio Pre-amp
Rx Audio Mute
Rx MainAudio Amp
1.5 1.5 1.5 1.5 1.0
1.0
1.5
1.0
Substrate Layout
1.5Rx InputFilters
Roofing Filter & IF Amp
T/R Switch RF AmpBP Filter Mixer PM Amp Xtal Filter IF Amp Prod Det Audio Rx Mute Audio
VFO Buffer RF Amp
Rx LO
MixerTx LO RF AmpBP Filter BP Filter Driver Final LP Filter
Xtal Filter
RIT
Receive Strip
Transmit Strip
Spkr
Ant
3.0-3.1 MHz
11 MHz
11 MHz
11 MHz 11 MHz14 MHz
RF Gain &
2N2/20 Block Diagram
RxInput
TxVcc
RxPMA
RxVFO
TC15-50 pF
R1
47K
R24.7K
D11N4148
D21N4148
D31N4148
R33.9K
D42v-2ma
D51N4148
Pot11K Audio Taper
Parts with pot
L15.6 uH
C11200 pF
TC25-50 pF
C282 pF
C32.0pF
L218T/T37-6 1.2uH
L318T/T37-61.2uH
C482 pF
TC35-50 pF
C51200 pF
Rx RF Gain
Rx T/R Switch Rx Input Filter
K8IQY's 2N2/20, 20 Meter CW Transceiver
L4100uH
R456
T11:4:11T/FT37-43
1T4T
R527
Q1PN2222
C60.1uF D6
2v-2ma
R63.3K
11T
C70.1uF
C80.1uF
Vcc
Rx RF Amp
Vcc
C90.1uF
1 Gnd2 IF3 RF 4Gnd
5Gnd
6LO
M1ADE-1
Rx Mixer R716
R816
R968
R1051
Jim Kortge, K8IQYFeb, 2004 - Sheet AA
Q22N4124
D71N4148
TxVFO
RxVFO
TxVcc
VFOA
VFOB
VFOC
VFOA
VFOB
VFOC
R11270
D81N4735A
D91N4004
Vcc
D10MV1662
Pot220K-10T
R1247K
C100.1uF
C110.1uF
C1256pF
L5
6.9uH
TC43-30pF
C13180pF
C1456pF
R135.6K
R1410K
C151000pF
C161000pF
R151.8K
R161K
R173.3K R18
47
Varicap Tuned VFO (3-3.1 MHz)
Q3PN2222
Q4PN2222
Q5PN2222
C17100pF
R19100
C180.1uF
C19120pF
TC55-50pF
+13dBm T216:3:1/FT37-61
16T 3T
1T +1dBm
C200.1uF
R2020K
R2127
C210.1uF
40T/T50-7
K8IQY's 2N2/20, 20 Meter CW Transceiver
Jim Kortge, K8IQYFeb, 2004 - Sheet AB
R2210K
R2327K
R2427K
R251.5K
R261.5K
R2747K
C220.01uF
POT11K
C230.1uF
D11MV209
Q62N7000
C240.1uF
C2556pF
Optional RIT
Parts with VFOParts with pot
14.2uH
C260.1uF
C270.1uF
RxPMA RxXRF
K8IQY's 2N2/20, 20 Meter CW Transceiver
T38TBifilar/FT37-43
R2843
C280.1uF
R2910
T49TP-3TS/BN2402
R3027
C290.1uF
Vcc
R313.3K
D122v-2ma
C300.1uF
R3210
R3310
R34130
Rx Main Xtal Filter
C31680pF
Y111.0MHz
C32220pF
C33220pF
Y211.0MHz
C34680pF
Y311.0MHz
C35220pF
C36220pF
Y411.0MHz
C37680pF
Rx Post-Mixer Amp
T59TP-3TS/BN2402
C38120pF
R3556
R36100
C390.1uF D13
1N4148
D141N4148
R374.7K
R3827 C40
0.1uF
Vcc
R391.5K
R4027
R4156
C410.001uF
T617TP-5TS/T37-2
C42
100pF TC65-50pF
Rx IF Amp
Jim Kortge, K8IQYFeb, 2004 - Sheet AC
C430.1uF
1.16uH
Q7PN2222
Q8MPSH10
Q9MPSH10
RxXRF
RxMute
K8IQY's 2N2/20, 20 Meter CW Transceiver
Jim Kortge, K8IQYFeb, 2004 - Sheet AD
C44680pF
Y511.0MHz
C45220pF
C46220pF
Y611.0MHz
C47680pF
R4233
Rx Xtal Roofing Filter
T710T-Trifilar/FT37-43
D151N5711
D161N5711
D171N5711
D181N5711
C480.1uF
C490.1uF
Rx Product Detector
C500.1uF
L61mH
R4351
C5147uF
R4433K
R4510K
R462.7K
C523300pF
R4727
R481K C53
10uF
VccR49100
Rx Audio Pre-Amp
C541uF
C551uF
R50270
R5110K
R522.2K
C56100pF
C57150pF
L78.2uH
Y711.0MHz
TC75-50pF
Rx Local Oscillator
Vcc
Q10PN2222
R53100
C580.1uF
C5963pF
L83.9uH
R54820
C600.01uF
+7dBm
R5551
(30+33)
Q11PN2222
TxVcc
RxMute
Keyline
TxVcc
T81200CT - 8
R5647K
R57220
C61100uF
R5847K R59
220C62100uF
C634.7uF
R60180
C640.1uF
R612.7K
R622.7K
Vcc C65470uF
SP1SPEAKER
Rx Main Audio Amplifier
C660.1uF
Q12PN2222
Q13PN2222
Q14PN2222
Q15PN2222
R632.2M
Pot310K Audio Taper
C670.1uF
R6410K
D S
G
R651M
D191N4148
Rx Mute
1.3
C680.1uF
C690.1uF
Q16J176
D201N5711
D211N5711
K8IQY's 2N2/20, 20 Meter CW Transceiver
Jim Kortge, K8IQYFeb, 2004 - Sheet AE
J112-13.8vdc F1
2amp
D221N4744A
S1Part of pot3
Vcc
DC Power R664.7K
R671K
C700.1uF
Vcc
Rx/Tx Switch
C710.22uF
Q172N2907
TxVFO
TxVcc
TxDriver
R6891
R69120
1Gnd2IF3RF4 Gnd
5 Gnd
6 LO
M2ADE-1
Tx Mixer
R706.8
R71150
R726.8
T92TP-20TS/T37-6
TC85-50pF
C7247pF
C7333pF
R734.7K
R7415K
R75150
C740.01uF
T1020TP-3TS/T37-6
TC95-50pF
C7547pF
R7615K
C760.1uF
TR150
Tx Cascode Amp
R77270
R7810K
R792.2K
C77100pF
C78150pF
L98.2uH
Y811.0MHz
TC105-50pF
Tx Local Oscillator
Vcc
Q18PN2222
R80100
C790.1uF
C8063pF
L103.9uH
R81820
C810.01uF
+7dBm
R8251
(30+33)
R8327
Jim Kortge, K8IQYFeb, 2004 - Sheet AF
K8IQY's 2N2/20, 20 Meter CW Transceiver
1.2uH
1.2uH
Q19PN2222
Q20PN2222
TxDriver
TxVcc
RxInput
C820.1uF
R844.3K
R851K R86
10
R8715
C830.1uF
T119TP-2TS/FT37-43
Tx RF Final
Q212N2222A
C840.1uF
Q222SC2166
R8851
L114T/FT37-43
Tx RF Driver
C85470pF
L1210T/T37-6
C86680pF
C87220pF
L1312T/T37-6
C8830pF
C890.1uF
C900.1uF
Tx LP Filter
C910.1uF
C923.3uF
VccC9356pF
Jim Kortge, K8IQYOct, 2004 - Sheet BG
R8927
0.34uH 0.52uH
C9447pF
K8IQY's 2N2/20, 20 Meter CW Transceiver
J2Antenna
2N2/20 Bill of Materials - Version 092704
Item Qty References Value1 2 C1,C5 1200 pF2 4 C12,C14,C25,C93 56pF3 1 C13 180pF4 2 C15,C16 1000pF5 4 C17,C42,C56,C77 100pF6 2 C19,C38 120pF7 2 C2,C4 82 pF8 4 C22,C60,C74,C81 0.01uF9 1 C3 2.0pF
10 6 C31,C34,C37,C44,C47,C86 680pF11 7 C32,C33,C35,C36,C45,C46,C87 220pF12 1 C41 0.001uF13 1 C51 47uF14 1 C52 3300pF15 1 C53 10uF16 2 C54,C55 1uF17 2 C57,C78 150pF18 2 C59,C80 63pF19 37 C6,C7,C8,C9,C10,C11,C18,C20,C21,C23,C24,C26,C27,C28,C29,C30,C39,C40,C43,C48,C49,C50,C58,C64,C66,C67,C68,C69,C70,C76,C79,C82,C83,C84,C89,C90,C91 0.1uF20 2 C61,C62 100uF21 1 C63 4.7uF22 1 C65 470uF23 1 C71 0.22uF24 3 C72,C75,C94 47pF25 1 C73 33pF26 1 C85 470pF27 1 C88 30pF28 1 C92 3.3uF29 8 D1,D2,D3,D5,D7,D13,D14,D19 1N414830 1 D10 MV166231 1 D11 MV20932 6 D15,D16,D17,D18,D20,D21 1N571133 1 D22 1N4744A34 3 D4,D6,D12 2v-2ma35 1 D8 1N4735A36 1 D9 1N400437 1 F1 2amp38 1 J1 12-13.8vdc39 1 J2 Antenna40 1 L1 5.6 uH41 1 L11 4T/FT37-4342 1 L12 10T/T37-643 1 L13 12T/T37-644 2 L2,L3 18T/T37-645 1 L4 100uH46 1 L5 6.9uH47 1 L6 1mH48 2 L7,L9 8.2uH49 2 L8,L10 3.9uH50 2 M1,M2 ADE-151 1 Pot1 1K Audio Taper52 1 Pot2 20K-10T53 1 Pot3 10K Audio Taper54 14 Q1,Q3,Q4,Q5,Q7,Q10,Q11,Q12,Q13,Q14,Q15,Q18,Q19,Q20 PN222255 1 Q16 J17656 1 Q17 2N2907
57 1 Q2 2N412458 1 Q21 2N2222A59 1 Q22 2SC216660 1 Q6 2N700061 2 Q8,Q9 MPSH1062 5 R1,R12,R27,R56,R58 47K63 5 R10,R43,R55,R82,R88 5164 3 R11,R50,R77 27065 1 R13 5.6K66 6 R14,R22,R45,R51,R64,R78 10K67 1 R15 1.8K68 5 R16,R48,R67,R85,POT1 1K69 1 R18 4770 5 R19,R36,R49,R53,R80 10071 4 R2,R37,R66,R73 4.7K72 1 R20 20K73 2 R23,R24 27K74 3 R25,R26,R39 1.5K75 1 R28 4376 4 R29,R32,R33,R86 1077 1 R3 3.9K78 1 R34 13079 3 R4,R35,R41 5680 1 R42 3381 1 R44 33K82 3 R46,R61,R62 2.7K83 8 R5,R21,R30,R38,R40,R47,R83,R89 2784 2 R52,R79 2.2K85 2 R54,R81 82086 2 R57,R59 22087 3 R6,R17,R31 3.3K88 1 R60 18089 1 R63 2.2M90 1 R65 1M91 1 R68 9192 1 R69 12093 2 R7,R8 1694 2 R70,R72 6.895 2 R71,R75 15096 2 R74,R76 15K97 1 R84 4.3K98 1 R87 1599 1 R9 68
100 1 S1 Part of pot3101 1 SP1 SPEAKER102 1 T1 1:4:11T/FT37-43103 1 T10 20TP-3TS/T37-6104 1 T11 9TP-2TS/FT37-43105 1 T2 16:3:1/FT37-61106 1 T3 8TBifilar/FT37-43107 2 T4,T5 9TP-3TS/BN2402108 1 T6 17TP-5TS/T37-2109 1 T7 10T-Trifilar/FT37-43110 1 T8 1200CT - 8111 1 T9 2TP-20TS/T37-6112 3 TC1,TC2,TC3 5-50 pF113 1 TC4 3-30pF114 6 TC5,TC6,TC7,TC8,TC9,TC10 5-50pF115 1 TR1 50
116 8 Y1,Y2,Y3,Y4,Y5,Y6,Y7,Y8 11.0MHz
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