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Ok. Time to check the crystals. The 11.11125 checks out at 11.11136 clarifier to extreme right, and 111110716 to the left. The 7.802 is 7.80238. The 7.7975 is 7.798338.
The 10.240 is 10.24002. The one up by L13 is glued over the numbers but has 3 legs so its not really an oscillator crystal...
No expo kit. It had thec11.1125 crystal relocatedcalongvwith a 10.something for lowers and a 13.something for uppers. All tied in with 3 20pf caps and soldered to the spot that the 11.11125 was in. The clarifier was one side to ground and the other to a constant 8v source near the pll chip. No...
I'll check that. The L20 is the AM? I can tune the 2 cans but like I said im up by 10khz on each channel. Would you happen to know the value of ct3? The sams only gives me a part number. Mine was swapped out. I tried a few, 20nf, even a 70nf. Nothing changed.
Thats cool but the 10k shift throws some of my channels into the A channel area. I did think about doing that mod but when I got into testing transmit and receive, I saw that I couldnt communicate between the walkie and the 142 due to the A channel skips.
All great info but how do theybstrip off the 10kz when all is said and done? Thats possibly how my 10khz stays coupled along the path somewhere. Tomorrow I will check all the points where these freqs are and see where my 10k stays added that will be where the problem part is. Great info Brandon!
They are all shifted by 10k.im thinking its the VCO area. Mind you, this was someone's hack job. Its a real mess. If I had some base figures to look for it would make it a bit easier. I mean, the sams shows thevtruth tables and voltages all over but no frequency points to look for. With all the...
The truth table checks out on all channels. The freqs are all up by 10k. Not down by 10k. I tested it for receive using my walkie as the transmitter. I pick up channel 1 by transmitting channel 2. So transmitting my walkie on 38, comes up on 39 on the 142. When I hit the channel skips like 3a...
Some issue withbthe clarifier as well. At 9 o'clock it drops out. Even when aligned to the 5 volts I lose my transmit. If I field adjust L13 I can get Tx back but i losevtx on lower 5 or 6 channels. If I tweak it to get tx back, i lose the top few channels.
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