08-07-2014, 02:18 PM
Well I replaced Z404, and R401 which is the 1 meg right beside it. Figured I may as well while I was at it. I also replaced R418, R419, R303, and R301. No noticeable change yet. Waiting for some resistors to come in still, 56K, and 22 ohm for R305 and R306, as well as the 2 watt resistors for the main voltage divider. LOL, at least things did not get any WORSE, AM and SW are still very good, and FM is receiving a lot of local stations, but the volume output is still low. I suspect R305 which is reading 62K or even more likely R306, which reads very oddly with my multimeter, not holding any consistent reading but bouncing between 17 and about 25 ohms. It does this with the FM1000 pulled from the circuit, which lifts one leg in effect. Something very odd there, but, since I don't have a 22 ohm 1/2 watt 5% on hand, I'll have to wait until my resistor order comes in to replace it.
Knowing something about FM, and how it works, the volume I am receiving from the stations I am picking up should NOT be dependent on the amplitude of the signal being picked up, but rather how far from the basic tuned frequency the signal varies up and down. I suspect that the output signal fed into Z403 is low, and that may well be from either of those resistors, so I shall live in hope and wait until they arrive.
Knowing something about FM, and how it works, the volume I am receiving from the stations I am picking up should NOT be dependent on the amplitude of the signal being picked up, but rather how far from the basic tuned frequency the signal varies up and down. I suspect that the output signal fed into Z403 is low, and that may well be from either of those resistors, so I shall live in hope and wait until they arrive.
