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I have a Texas Star DX250 that has been sitting in my closet for about 20 years. I thought I would upgrade the power wires and the change the bulbs to led. the problem is I cant figure out how to remove the push button assembly to get to the bulbs. I also heard that common #74 led bulbs would...
I would perform the NPC-RC modification to wake up the AM modulation. A diode, resistor and a piece of wire will give you a low deadkey with maximum modulation for running into an amplifier
Your spectrum analyzer is a great tool. Do you have an O-scope you can beg, borrow, steal? Do you have a schematic of your radio you can share so we all are on the same page? I would take a scope probe and check the audio signal from IC4 pin1 along the FM path till I lost it. or half the...
I tend to agree with M0GVZ. I cant find a schematic for your radio but highlighted the FM path I would be checking for open/shorted components. The audio chip IC4 is good as is the audio output chip IC8 which is just for the speaker/PA.
Do you have a RTL-SDR dongle/ SDRPLAY where you can observe...
I love Talkback and want to give a shoutout to NZ8N for his posts on this subject. I recently purchased a couple of these boxes on e-bay He has alot left. just search "cb talkback" on e-bay. these are new old stock and the best i can determine is all mode relay talkback modules for 10 meter and...
Hello Pierce, This appears to be the NPC-RC modification which stands for Negative Peak Compression- Reduced Carrier..... The diode is missing a 100 ohm resister and the blue wire is volting the final to 12 volts.. This mod when done correctly will allow the radio to operate with a 2 watt...
Mine is the original that was sent with the meter when purchased..
Its just a little wallwart made by jameco. 120vac 5.5w input.. output says 9 volts dc @300 ma negative centerpin... I have not measured the actual output voltage but read someplace you can wire it up to your 12 volt...
I agree, that meter is a killer. I also have one I bought new when Autek was making them but its a white face one.. Im still lookin for the black model...
That RF Sampler is a PASSIVE device, it does not create harmonics or trash by a mixing scheme. What you are seeing is your actual transmitted signal. Wrap some wire around your coax and feed it to the scope, You'll see the same thing.
Collins Radio used that same -30db design years ago.
By no means am I an expert and I really need to go to the VA for new glasses, BUT, you need to check your gamma assembly... After blowing up the picture I dont see the shorting bar.. After that stand it up vertically on plastic milk crates or tie a rope around the last director hoisting up via...
Shadetree, You dont need to use Declination... Heres a map centered on your state that shows where to point for any place.. Its close to poster size so you can print it at walmart and hang it in the shack... or just keep it on the desktop..
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