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Old 01-17-2011, 01:34 PM
DaveWM DaveWM is offline
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Join Date: Feb 2009
Location: Orlando FL
Posts: 5,607
took a break from the TV for a bit to concentrate on the SS stereo. pots needed some cleaning. AM was not working right. It was very odd, would birdy and could be made to work if I turned it off and then on and carefully manipulated the selector. had some odd voltages in the AM section. Noticed I could kill it by touching the VC (the midde section for the RF tuned section, not the osc and not the main tuning from the antenna coil). it would stop and would only play if you turned it off and then on again. I finally swapped out the RF amp transistor and bingo, works fine. The RF amp transistor had leakage between the E and C and had the wrong v reading in the diode mode between one of the leads to the base. Anyway its working well now, I check the stereo separation, all good, so it will go back in now. I will be turning my attention back to the HV regulation next. I noted some odd bends in the vert color bars I was getting OTA, the right side bars were not straight. guessing someting in the horz sweep. I will check caps around there esp the coupling caps, and mess with the horz osc/horz out to see if I can get it working, but I need the get the HV regulation working 1st.
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