Advertisement
Quick Links
The following assembly instructions should be followed carefully. The INSPIRE VLF-3
receiver kit is NOT a simple electronic assembly. 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 fix. Be careful, take your time, and GOOD
LUCK!
TOOLS NEEDED:
Philips head screwdriver
Small standard screwdriver
Wire cutters
Wire stripper
Soldering iron (15-25 watt, small tip)
Light duty resin core solder (60/40)
Sponge
Magnifying glass
Solder sucker or solder wick
KIT CONTENTS:
1. Black plastic enclosure
2. Face Plate
3. Printed Circuit Board (PCB)
4. Four bags of components:
Bag 1
Bag 2
Bag 3
Bag 4
VLF-3 Assembly Instructions
INSPIRE VLF-3 Receiver Kit
Assembly Instructions
resistors, inductors
capacitors
ICs, diodes, sockets
switches, jacks, knobs, antenna terminal, wires, misc. hardware
1
Advertisement
Related Manuals for Inspire VLF-3
Summary of Contents for Inspire VLF-3
-
Page 1: Assembly Instructions
INSPIRE VLF-3 Receiver Kit Assembly Instructions The following assembly instructions should be followed carefully. The INSPIRE VLF-3 receiver kit is NOT a simple electronic assembly. 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 fix. - Page 2 VLF-3 Assembly Instructions Faceplate Front Control Panel Printed Circuit Board (PCB): Component Side / Battery Side Switch Side All electronic components are inserted The four DPDT slide switches, the two from this side and soldered on the other 10k pots and the two LEDs are inserted side.
- Page 3 VLF-3 Assembly Instructions...
-
Page 4: Assembly Sequence
VLF-3 Assembly Instructions ASSEMBLY SEQUENCE Solder components to PCB. Assemble jacks subassembly, connect wires to antenna terminal. Connect wires to PCB. Final assembly of receiver. Test receiver. (Check off boxes as each step is completed.) 1. Solder components to PCB. - Page 5 VLF-3 Assembly Instructions What is the resistance for each of the following? Example 1 Example 2 Example 3 Example 4 Band 1 brown yellow orange Band 2 black violet black orange Band 3 brown orange green orange Band 1 Band 2...
- Page 6 VLF-3 Assembly Instructions STEPS FOR SOLDERING RESISTORS, CAPACITORS AND WIRES: IMPORTANT: DO NOT leave a soldering iron plugged in for a long time without using it. NEVER leave a hot soldering iron unattended. Soldering iron lead contact 1. Clean the tip of the iron by wiping it on the wet sponge.
- Page 7 VLF-3 Assembly Instructions IMPORTANT Note for New Soldering Irons: A new soldering iron must be “tinned” in order to work well. Follow these steps: 1. Plug in the iron. 2. When it first heats up, apply solder liberally to the tip.
- Page 8 VLF-3 Assembly Instructions 1c. Solder capacitors to the PCB. Capacitor Identification Guide C1, C3 C2, C6, C7 C4, C10, C18 24 pF .01 µF 10 µF “240J0” “103” .1 µF C11, C12 100 µF .15 µF “104” C14, C16 .001 µF...
- Page 9 VLF-3 Assembly Instructions 1d. Install the inductors (L1 and L2) The inductors are the two remaining parts in Bag #1. Inductor L1 is marked “LH 239”.. Inductor L2 is marked “LJ 415”. From the component side, press the inductor firmly down against the PCB and solder the other side.
- Page 10 VLF-3 Assembly Instructions 1f. Install the battery holder. From Bag #4, take the following parts: Battery holder PCB standoff post 4-40 3/8 “ screw 4-40 1/4” screw 4-40 nuts nylon washers #4 washers The following diagram shows the assembly of the battery holder to the PCB: 1.
- Page 11 VLF-3 Assembly Instructions 1f. Install the potentiometer and switches. From Bag #4, remove the two 10k pots (R7 and R26) and the four DPDT slide switches. DPDT Switches R7, R26 DPDT Switches Slide the three contacts for the pots through the holes provided from the switch side of the PCB.
- Page 12 VLF-3 Assembly Instructions 2. Attach wires to the PCB. Bag #4 contains the following wires: 3” 4” orange 4” yellow 3” blue 3” black 5” white Make the following cuts on the wires: 1 red: 1”, 2” 1 orange: 2”, 2”...
- Page 13 VLF-3 Assembly Instructions Wires installed (component-side view) Close up of white and black wire twisted together prior to being soldered to location #2 on the PCB. Wires installed (switch-side view)
- Page 14 VLF-3 Assembly Instructions 3. Install the jacks and connectors to the faceplate. Install the jacks and the external power connector to the faceplate by inserting them from the back side and tightening the knurled nut on the front side. Mount the 2-screw antenna terminal to the faceplate by placing the terminal in front of the faceplate and using the two remaining 4-40 1/4”...
- Page 15 VLF-3 Assembly Instructions Close-up showing wires soldered to the jack tabs. NOTE: The orange and yellow wires must cross to connect to the appropriate jacks. The microphone connector may be either white (as pictured) or black Front view of completed...
- Page 16 Use the 4 6/32 1/4 inch screws to attach the faceplate to the Antenna Terminal enclosure 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.
- Page 17 VLF-3 Assembly Instructions 6a. Test the audio output. Plug some headphones in the audio output jack. Turn on the “RECEIVER POWER” switch (main power switch). Turn on the “AUDIO POWER” switch and slowly turn the “AUDIO LEVEL” up. You should hear a loud hum as you pick up the 60 hertz signal given off by building wiring.
- Page 18 Any part shortages or discrepancies should be reported to the inspire project: president@TheINSPIREProject.org Any corrections, suggestions or recommendations for improvement of the assembly instructions would also be appreciated.
Need help?
Do you have a question about the VLF-3 and is the answer not in the manual?
Questions and answers