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Inspire VLF-3, Assembly Instructions Manual

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VLF-3 Rev #1C Assembly Instructions 

5 

 
 
 
 
 
 

Instructions Outline

 

 

1.  Solder components to the Printed Circuit Board (PCB) 

2.  Connect wires to PCB  

3.  Install jacks and connectors to the faceplate 

4.  Attach the PCB to the faceplate 

5.  Solder wires to jacks and  

6.  Test receiver 

7.   Diagnostics Guide – First Steps 

 

Summary of Contents for VLF-3

Page 1: ...bly If you follow the instructions carefully you should be successful in building a receiver that works If you are not careful you run the risk of having a problem that is very difficult to locate and...

Page 2: ...ONTENTS 1 Black plastic enclosure 2 Face Plate 3 Printed Circuit Board PCB 4 Four bags of components Bag 1 resistors inductors Bag 2 capacitors Bag 3 ICs diodes sockets Bag 4 switches jacks knobs ante...

Page 3: ...mponent Side Battery Side All electronic components are inserted from this side and soldered on the other side The battery holder is inserted from this side also Switch Side The four DPDT slide switch...

Page 4: ...GND 100K 20K 20K 10uF GND GND 1K GND 0 1uF GND 10uF ANTENNA R1 R3 C3 L1 C1 C2 Z2 Z1 R4 F1 D S G R6 R5 C5 C14 C4 C6 L2 C7 Q1 R9 R8 R25 R11 R12 R10 C9 R13 C8 I C2A 2 3 1 I C2B 6 5 7 I C1 1 2 3 8 5 6 4...

Page 5: ...ons Outline 1 Solder components to the Printed Circuit Board PCB 2 Connect wires to PCB 3 Install jacks and connectors to the faceplate 4 Attach the PCB to the faceplate 5 Solder wires to jacks and 6...

Page 6: ...ve connected this end to ground To fix that you will need to scrap of a small part of the green coating on the trace that runs directly under C12 and connect this lead to that ground trace when you in...

Page 7: ...Assembly Instructions 7 5 Let s take some time to talk about soldering If you are comfortable with soldering skip along to the next section and have at it If not let s start with a brief overview of h...

Page 8: ...VLF 3 Rev 1C Assembly Instructions 8...

Page 9: ...per pad to try to flow the solder If necessary had a very small additional amount of solder but avoid prolonged contact with the soldering iron or you may damage the component or PCB copper pad You wi...

Page 10: ...1 000 000 mega Meg What is the resistance for each of the following Example 1 Example 2 Example 3 Example 4 Band 1 Band 2 Band 3 brown black brown yellow violet orange red black green orange orange or...

Page 11: ...t between the two holes for insertion of the leads Part of the PCB showing location of R1 R3 R4 and R6 To install place the leads of the resistor through the appropriate holes and press the resistor d...

Page 12: ...VLF 3 Rev 1C Assembly Instructions 12 After installing the resistors you will have something like the following picture The capacitors inductors and diodes are installed in the same way...

Page 13: ...r side of the PCB taking care not to create any solder bridges between the pins Install the IC so that the end with the dot is at the end of the socket with the half hole Carefully fit the 8 pins in t...

Page 14: ...dy of the capacitor with a stripe with a minus sign located on the negative side of the capacitor Also the shorter lead is the negative lead To install a capacitor insert the leads in the appropriate...

Page 15: ...s with a silver stripe near one end On the PCB the D1 and D2 locations are shown as a rectangle with a stripe near one end Align the striped end of the diode with the striped end of the PCB symbol Pre...

Page 16: ...PCB from the component side and press the holder firmly against the PCB 2 Insert 1 4 screws through the holes nearest the leads through the PCB and tighten the nuts on the switch solder side 3 Insert...

Page 17: ...DT slide switch into position and press the switch firmly against the switch side of the PCB Solder each contact on the component side 1h Install the LEDs Align the LED leads as shown with the shorter...

Page 18: ...the metal pad on the PCB for about 5 seconds to heat both the wire and the pad 3 Apply solder to the wire side away from the soldering iron making sure that the wire and pad melt the solder not the s...

Page 19: ...3 Rev 1C Assembly Instructions 19 Wires installed component side view Wires installed switch side view Close up of white and black wire twisted together prior to being soldered to location 2 on the P...

Page 20: ...ews and washers to the standoffs Tighten the nuts on the 10k pot shafts 5 SOLDER WIRES TO JACKS AND CONNECTORS To solder the wire to a jack contact 1 Insert the wire through the hole in the tab 2 Pres...

Page 21: ...lder both red wires to the ANT side of the antenna terminal Use the set screws to attach the knobs to the 10k pot shafts Install a 9 volt battery in the battery holder Use the 4 6 32 1 4 inch screws t...

Page 22: ...s 22 THIS COMPLETES THE ASSEMBLY OF YOUR VLF 3 RECEIVER 6 TEST YOUR RECEIVER Attach an antenna to the ANT terminal a 1 2 meter piece of wire will do Attach a ground to the RTN terminal a short wire th...

Page 23: ...microphone into the MIC IN jack Slide the switch to the MIC position You should hear the 60 hertz hum in one ear and the microphone input in the other ear 6c Field test your receiver To ready your rec...

Page 24: ...this feedback If your receiver doesn t even provide hum at the output then something else is going on It could be a dead battery it happens even with new ones sometimes Or there could be a problem wit...

Page 25: ...ts will have been corrected by carefully inspecting for solder bridges and missed solder connections The next most common error is in the wiring from the PCB to the external connections The previous t...

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