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EA3GCY ILER-40MK2, Инструкция по сборке

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ILER-40 MK2 SSB QRP Transceiver Kit

Page 23


VXO tuning Polyvaricon CV2/CV3

Install the hardware shaft onto the polyvaricon with the 12mm-long, M2.5 screw.
Mount the Polyvaricon with a separation of 2-3mm or more from the board (see picture). This makes it
easier to fit the variable cap to the front panel. Please, do not solder it until you are sure of how you are
going to mount the board into the box.

You may want to mount the polyvaricon off the board. This may be a good idea and there is no
objection to doing it, but use very short and slightly rigid wires. Even small movements may
affect the tuning!

This polyvaricon contains two variable tuning capacitor sections. By means of external jumpers J1 A/B,
you may select 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 160pF, CV3 has about 70pF.
In the back of the capacitor there are two padders (trimmers) for fine adjustment. The lower one is
parallel with CV2 (J1-B) and the top one is parallel with CV3 (J1-A).

Adjusting these trimmers

changes the upper limit of band coverage by some 10-20 KHz!

The upper limit adjustment must be

done with the polyvaricon at its minimum capacitance (turned completely clockwise).

For the ILER-40, jumper J1 must be placed in position B.

IMPORTANT:

When screwing the polyvaricon to the front panel (M2.5 screws of 4mm) take care to not

drive the screws in too much, to avoid blocking the internal mechanism of polyvaricon. If needed, add
some washers to space the screws out from the panel to avoid this problem.

Содержание ILER-40MK2

Страница 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...

Страница 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...

Страница 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...

Страница 4: ...ariable tuning capacitor polyvaricon Antenna 50 ohms Power supply 12 14VDC 35mA in receive without signal 1000 1100mA in transmit Components 65 resistors 83 capacitors 3 variable resistors 1 trimmer c...

Страница 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...

Страница 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...

Страница 7: ...K P1 RX gain pot w shaft optional no included 1K lin 1 10K P4 Volume control pot w shaft 10K 2 5K P2 P3 ajustable trimmer 502 or 53E 1 500 P5 ajustable trimmer 501 or 52Y R64 is 1K brown black red if...

Страница 8: ...hoque 2 T37 2 L11 L12 LPF toroids 9 5 mm diam Red 1 T68 2 L6 Toroid Tuning inductor 18 mm diam Red 4 5u3H 3334 T1 T2 T3 T4 coils 5u3H 5u3H 2 FT37 43 T6 toroid 8t 8t T5 toroid 10t 3t 9 5 mm diam Black...

Страница 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...

Страница 10: ...mp 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 gen R...

Страница 11: ...K 4 5 C57 1n 102 or 0 001 TX Pre driver input G 3 C58 NO 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 F 1 C61 82p 82p or 82J TX Pre driver BPF H 1 C62 8...

Страница 12: ...H 3 L4 Axial 39uH orange white black BFO K 5 L5 Axial 100uH brown black brown BFO I 7 L6 T68 2 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...

Страница 13: ...ILER 40 MK2 SSB QRP Transceiver Kit Page 13 120 QUADRANT COMPONENT LAYOUT MAP...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 19: ...ou will need to hold the soldering iron a little longer on the joint 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 24: ...rough 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 sectio...

Страница 25: ...ounting 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 grea...

Страница 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...

Страница 27: ...t 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 the...

Страница 28: ...t with the polyvaricon at its minimum capacitance completely clockwise In the ILER 40 try locating the padder trimmer at its minimum capacitance completely open to obtain the highest possible upper li...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 35: ...ILER 40 MK2 SSB QRP Transceiver Kit Page 35 SCHEMATIC...

Страница 36: ...stiff wires as the mechanical stability is very important A metal box is highly recommended The ILER 40 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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