EA3GCY ILER-20 MK2 Assembly Manual Download Page 11

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ILER-20 MK2 SSB QRP Transceiver Kit

Page 11

Crystals

Checked

Ref.

Frequency

Ident./Comment Circuit section Located

3.276MHz.

I.F.

E-7

3.276MHz

I.F.

E-6

3.276MHz

I.F.

E-5

3.276MHz

I.F.

E-4

3.276MHz

BFO

J/K-6

11.000MHz or 11.046MHz

VXO

J-3

11.000MHz or 11.046MHz

VXO

I-3

Semiconductors

Checked

Ref.

Type

Ident./Comment

Circuit section

Located

Transistors

BC547

RX RF mute

C-8

BC547

Carrier switch

D-6

BC547

Audio AGC-preamp

H-9

BC547

Audio AGC-preamp

H-8

C44

100n

104 or 0.1

BFO offset

L-4

C45

270p

n27 or 271

BFO

I-7

C46

270p

n27 or 271

BFO

J-6

C47

102 or 0.001

BFO

I-7

C48

100n

104 or 0.1

BFO

J-7

C49

10uF

10uF 25V or 35V (elec)

BFO/VXO supply

K-7

C50

100n

104 or 0.1

BFO/VXO supply

I-8

C51

100n

104 or 0.1

VXO

K-3/4

C52

100p

n10 or 101

VXO

K-4/5

C53

100p

n10 or 101

VXO

J-4/5

C54

47p

47p or 47J

VXO

J-4/5

C55

102 or 0.001

VXO

H-4

C56

100n

104 or 0.1

VXO

K-4/5

C57

102 or 0.001

TX Pre driver input

G-3

C58

NOT USED

TX Pre-driver

I-1/2

C59

100n

104 or 0.1

TX supply

C-5

C60

100n

104 or 0.1

TX Pre-driver

C61

100p

101 or 100J

TX Pre-driver BPF

H-1

C62

8p2

8p2 or 8.2

TX Pre-driver BPF

G-2

C63

100p

101 or 100J

TX Pre-driver BPF

C64

100n

104 or 0.1

TX Driver

E-3

C65

100n

104 or 0.1

TX Driver

E/F-2

C66

102 or 0.001

TX Driver

D-1

C67

100n

104 or 0.1

BIAS supply

D-4

C68

10n

103 or 0.01

TX Driver

B-1

C69

10n

103 or 0.01

TX Driver

C-2

C70

100n

104 or 0.1

TX Driver supply

C-2/3

C71

100n

104 or 0.1

TX Driver supply

E-3

C72

100n

104 or 0.1

BIAS supply

C-3

C73

100n

104 or 0.1

TX Out Amp supply

C-5

C74

10uF

10uF 25V or 35V (elec)

TX Out Amp supply

C/D-6

C75

100n

104 or 0.1

TX Out Amp

B-2/3

C76

10n

103 or 0.01

TX Out Amp

B-3/4

C77

100n

104 or 0.1

TX Out Amp supply

B-4

C78

100n

104 or 0.1

TX Out Amp

A-5

C79

220p

220 (polystyrene)

LPF

A-6

C80

470p

470 (polystyrene)

LPF

B-6

C81

220p

220 (polystyrene)

LPF

C-6

C82

100n

104 or 0.1

PTT

G-6

C83

27p

27p or 27J

Offset BFO

K-6

CV1

120p

Trimmer (black)

BFO

J-5

CV2 + CV3

Polyvaricon (tuning control)

VXO Tuning

L-2/3/4

Summary of Contents for ILER-20 MK2

Page 1: ...ver Kit Assembly manual Version 2 last update June 2017 Translated by Marlin KC0O ea3gcy gmail com Most recent updates and news at www qsl net ea3gcy Thanks for constructing the ILER 20 MK2 SSB Transc...

Page 2: ...FICATIONS 4 TIPS FOR FIRST TIME BUILDERS 5 PARTS LIST SORTED BY VALUE QUANTITY 7 INDIVIDUAL PARTS LIST 9 120 QUADRANT COMPONENT LAYOUT MAP 13 ASSEMBLY 14 ADJUSTMENT AND TESTING 27 IF YOUR KIT DOES NOT...

Page 3: ...the ILER kits is a Spanish redesign of the 80 meter transceiver Antek by Andy SP5AHT published in the magazine Swiat Radio By switching the LO and the BFO between the two NE602 s each one carries out...

Page 4: ...MHz Variable tuning capacitor polyvaricon Antenna 50 ohms Power supply 12 14VDC 35mA in receive without signal 800 900mA in transmit Components 65 resistors 83 capacitors 3 variable resistors 1 trimme...

Page 5: ...to the proper place on the circuit board the second is good soldering To solder properly you must use a high quality solder for electronics use and the correct type of iron Use a small soldering iron...

Page 6: ...utline of the circuit board Electrolytic capacitors These must be placed with the correct polarity The positive lead is always the long lead The negative terminal is the short lead and is marked by a...

Page 7: ...own black green 1 1K P1 RX gain pot w shaft optional not included 1K lin 1 10K P4 Volume control pot w shaft 10K 2 5K P2 P3 adjustable trimmer 502 or 53E 1 500 P5 adjustable trimmer 501 or 52Y R65 is...

Page 8: ...8 L10 Chokes 2 T37 2 L11 L12 LPF toroids 9 5 mm diam Red 1 T68 2 L6 Toroid Tuning inductor 18 mm diam Red 4 1u2H 3335 T1 T2 T3 T4 coils 1u2H 1u2H 2 FT37 43 T6 toroid 8t 8t T5 toroid 10t 3t 9 5 mm diam...

Page 9: ...green Audio AGC preamp H 9 R24 270K red violet yellow Audio AGC preamp H 8 R25 4K7 yellow violet red Audio AGC preamp H 10 R26 33K orange orange orange Audio AGC preamp H 9 10 R27 22K red red orange...

Page 10: ...preamp F 9 C12 100n 104 or 0 1 Mic preamp F 8 C13 1uF 1uF 25V 35V or 63V elec DSB gen RX mix G 6 7 C14 100n 104 or 0 1 Carrier ctrl D 5 C15 100n 104 or 0 1 DSB gen RX mix F 6 C16 220p n22 or 221 DSB...

Page 11: ...XO K 4 5 C57 1n 102 or 0 001 TX Pre driver input G 3 C58 NOT USED TX Pre driver I 1 2 C59 100n 104 or 0 1 TX supply C 5 C60 100n 104 or 0 1 TX Pre driver F1 C61 100p 101 or 100J TX Pre driver BPF H 1...

Page 12: ...4 Axial 82uH grey red black BFO K 5 L5 Axial 100uH brown black brown BFO I 7 L6 T68 2 53 turns see text VXO J K 1 2 L7 Axial 100uH brown black brown VXO K 4 L8 VK200 ferrite wound Driver D 3 L9 Axial...

Page 13: ...ILER 20 MK2 SSB QRP Transceiver Kit Page 13 120 QUADRANT COMPONENT LAYOUT MAP...

Page 14: ...mmers P2 P3 and P5 P4 is the volume potentiometer which will not be installed yet Refer to the parts list and select the first resistor R1 Bend the leads as close to the component body as possible and...

Page 15: ...ation of 1 1 5mm from the board Note L4 is mounted vertically Diodes Next mount the diodes being careful to place them with the correct orientation There is a band on one end of each diode that corres...

Page 16: ...s of their value before soldering them in place The electrolytic capacitors must be placed with the correct orientation the LONG LEAD goes in the hole labeled and the SHORT LEAD is indicated by a band...

Page 17: ...nd move the board towards the solder to solder the headers in place If you have someone available to help you it will be much easier Transistors All of the transistors have their type printed on the c...

Page 18: ...against the circuit board Next insert IC1 IC2 IC3 and IC4 into their respective sockets IMPORTANT Make sure that the IC s are fully inserted into their sockets A poor contact between the socket and IC...

Page 19: ...t or use a higher wattage soldering iron LPF Toroids L11 and L12 L11 and L12 are identical They use T37 2 cores red toroid with 9 5mm 0 375in OD Cut 20cm 7 8 of 0 5mm diameter enameled wire and wind e...

Page 20: ...ibuted around the circumference of the toroid Leave pigtails of 10 20mm 0 70 Now take about 8cm 3 5 of 0 5mm diameter enameled wire and wind three 3 turns on the other side of the toroid spacing the t...

Page 21: ...as to the direction of the winding Toroidal transformer T6 T6 is an impedance matching transformer with a bifilar winding A FT37 43 is used black toroid with 9 5mm 0 375in OD It has 8 8 turns Cut a 3...

Page 22: ...ends and separate the two windings Use a sharp X Acto knife to scrape the enamel off the ends that will be soldered The ends of the coils that we have made need to be prepared in this manner before so...

Page 23: ...ct which section you will use section CV2 which is the one with greater capacitance is selected by placing jumper B section CV3 which has less capacitance is selected by placing jumper A CV2 has about...

Page 24: ...through a magnifying glass The half turns that only pass through the inside of the toroid also count as a complete turn IMPORTANT DO NOT MOUNT toroid L6 yet It will be installed later in the last sec...

Page 25: ...er mounting the transistor to the heatsink verify with a multimeter that the transistor case does not make contact with the screw or with the heatsink It is also recommended to apply a dab of thermal...

Page 26: ...ment This potentiometer is optional and is not included with kit For connection details see the corresponding Appendix in the additional documentation If not using the P1 remember to place a jumper br...

Page 27: ...put of the frequency counter is low impedance insert a 470 ohm or greater or a small value capacitor try with 22pF or less between the frequency counter and the header to reduce the interaction with t...

Page 28: ...stment with the polyvaricon at its minimum capacitance completely clockwise In the ILER 20 try locating the padder trimmer at its minimum capacitance completely open to obtain the highest possible upp...

Page 29: ...ice versa In order to obtain good stability a maximum coverage of 50 60 KHz is recommended In addition a wide coverage will make tuning difficult and it will be necessary to add a fine tuning control...

Page 30: ...vel of noise in the speaker Now try to tune in a stable signal within the band and readjust T1 and T2 alternatively until you hear it at the highest possible level If you have access to an RF generato...

Page 31: ...PTT pin of the mic and monitor the transmitter output with an oscilloscope with a 50 ohm load connected Adjust P3 to obtain the minimum level possible of residual carrier signal If you don t have acce...

Page 32: ...omponents mounted in the wrong place If your kit does not work after final assembly please follow these steps in order Double check every step in the assembly manual the solder connections and correct...

Page 33: ...Tx E Rx E Tx C Rx C Tx Q1 BC547 0 0 7 0 0 0 0 Q2 BC547 0 0 0 0 1 28 1 28 Q3 BC547 0 60 0 0 04 0 85 2 20 0 Q4 BC547 0 46 0 0 0 0 04 0 85 Q5 BC547 0 60 0 0 0 3 65 0 Q6 BC547 0 0 0 0 12 0 Q7 BC547 0 0 7...

Page 34: ...ation 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 good workmans...

Page 35: ...ILER 20 MK2 SSB QRP Transceiver Kit Page 35 SCHEMATIC...

Page 36: ...stiff wires as the mechanical stability is very important A metal box is highly recommended The ILER 20 is not protected against reverse polarity It is a good idea is to place a diode i e BY255 or lar...

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EA3GCY ILER-20 MK2, Assembly Manual

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