Below are special pictures that have importance...concerning the Islander Project. Do take a look at them all. I describe what each picture is showing...
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This picture shows a portion of the Islander and the potentiometers for the audio mixer.
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The picture to the right shows the power supply.
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Here is a portion of the Islander, showing all the electrical lead hook-ups.
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The picture to the right shows the input of the audio mixer, which goes to the audio input of the Islander.
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A close-up picture of the three potentiometers, which is a portion of the audio mixer circuitry.
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Another close-up picture. This one shows how much I had to stretch L3, to give me the highest output voltage available.
Notice beside L3, is the VK-200 choke.
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The picture to the left shows the backside of the PCB, in which the NTE342 (2SC1971) is attached to.
Notice the white substance behind the transistor. This creamy substance is needed to have the heat from the transistor...transfer to the backside of the PCB. This back portion of the PCB is not only used to attach the transistor, but also serves as a large heatsink, needed for the transistor.
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Here is a close-up picture of the NTE342 (2SC1971) transistor.
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This is how the NTE342 (2SC1971) power transistor looks like (on the backside of the PCB), in relation to the topside of the PCB.
Notice, L2 and the stretched L3 located on the topside of the PCB.
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Another picture of the NTE342 (2SC1971). Notice you can see where the copper has been taken away from the left leg of the transistor.
The copper had been taken away, also, from the right leg of the transistor.This was needed, so the two outside legs would not short out on the backside of the PCB...which is also the ground plane.
The center leg of the transisor is the EMITTER. This leg DOES attach to the bottom side of the PCB...for a GROUND connection.
Here is a nice overall look of the Islander Project.
- The Power Supply
- The PCB with components
- The audio mixer circuitry
- The coaxial cable connection
- The housing for the project
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I added a picture of my CD audio player. I use it to play music, when I am transmitting my Islander's signal.
Also, on top of the CD player, is the auxiliary electret microphone...for the obtion to talk.
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Here is a picture of my Digital Volt Meter (DVM) and my home-made Switchable RF Probe/Watt Meter.
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I've used 'banana plugs' for easy attachment to my DVM or analog meter.
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Here is a close-up picture of my Switchable RF Probe/Watt Meter.
Notice the input leads are on the top portion of the device...whereas the output terminals are on the bottom portion of the said device.
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Here is another view of the meter.
Keep the input leads (the two leads on the right portion of the device) to within 3/4 of an inch in length...no longer!
The coaxial cable is soldered to the output terminals...which is on the left side of the meter.
Again, should you need guidance/advice along the way...I will help in any way possible ! ! !
...Harold