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radiodude
| | Posted on Tuesday, November 11, 2003 - 8:45 am: | 
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I want to unamp a D104 Night K. Can someone help me? |
Kc0gxz
| | Posted on Tuesday, November 11, 2003 - 12:52 pm: |
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radiodude
There are a couple of ways to do this and they're both kind of tricky unless you are very familiar with the workings of the up9 amplifier.
If you look at the amplifier (with cord at bottom) you will see two leads (green & yellow) that are coming down through the stem and attach to the top of the audio amp board. If memory serves me correctly, the yellow wire goes to ground and the green wire is the one that will be unsoldered. (Sometimes these wires are reversed but it makes no difference because they will work either way).
The wire on the right (no matter what the color) goes directly to ground. The wire on the left is your audio wire and this is the one that you will be playing with. Unsolder this audio wire and add more wire to it.
Next, remove the four screws that hold the amp in the base and CAREFULLY lift it out and turn it over.
Once this is done, look for the "white" wire that comes from the mic cord and is soldered to a relay pad. Now you have a choice to make. You can either solder your now lengthened audio wire to this "white" wire pad, OR solder it to its mating relay pad.
Soldering it directly to the "white" wire will give you what is called a "opened line". That means that your audio is always turned on whether the mic is keyed or not. This kind of setup is used for vox switching. However, I suggest soldering it to its mating relay pad so the audio is switched OFF when the radio is unkeyed.
I hope this mess has made some kind of sense to you. Good luck with your project.
73s for now.
Jeff, kc0gxz.
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