02-21-2014, 12:58 PM
Ok, alignment done (at least attempted). The good: It has REALLY brought it to life! It is MUCH louder. The IF was way off, and so was the LF osc. The bad: I still have issues in the higher freq's. Here is what I have so far. It seems much more selective and sensative below 110 on the dial. Above that, all I get is noise, motorboating and oscillations, depending on the location of the tuning cap.
It also goes microphonic at certain points. (That is, in the problem area - does NOT do this below 110 where things are working properly) I am guessing the HF oscillator is going out of whack at that point (I can about play the piano tapping the tuning plates). I have also checked for shorts on the cap. None found so far. I also could NOT get the #4 adjustment to go tune right. I have a lot of noise when adjusting, and it had a very weak signal (much more than low freq'). It just didnt respond like the others. Have to crank up the RF generator pretty high to hear. The others, I set the gen about as low as it will go. I have improved it a lot, but it still isnt right. I pulled the screws on the side with the adjustments and cleaned the contacts, put the screws back in. Seemed to help a little. When I get below 110, it kicks back in and I get stations and 'normal' static.
Mike, does your HF osc adjustment cap #4 have a small metal washer between the nut and tha cap? Mine does, the other 2 (#5 & #6) do not. Also, the tuning cap has bent out plates on the end. See my pic. You can also see the washer. This seems to be where the problem area is. I feel everything from the IF on out is working ok.
Here is a shot of the tuner - see what you think. Any help appreciated. Bout ready to call "Ghostbusters"
It also goes microphonic at certain points. (That is, in the problem area - does NOT do this below 110 where things are working properly) I am guessing the HF oscillator is going out of whack at that point (I can about play the piano tapping the tuning plates). I have also checked for shorts on the cap. None found so far. I also could NOT get the #4 adjustment to go tune right. I have a lot of noise when adjusting, and it had a very weak signal (much more than low freq'). It just didnt respond like the others. Have to crank up the RF generator pretty high to hear. The others, I set the gen about as low as it will go. I have improved it a lot, but it still isnt right. I pulled the screws on the side with the adjustments and cleaned the contacts, put the screws back in. Seemed to help a little. When I get below 110, it kicks back in and I get stations and 'normal' static.
Mike, does your HF osc adjustment cap #4 have a small metal washer between the nut and tha cap? Mine does, the other 2 (#5 & #6) do not. Also, the tuning cap has bent out plates on the end. See my pic. You can also see the washer. This seems to be where the problem area is. I feel everything from the IF on out is working ok.
Here is a shot of the tuner - see what you think. Any help appreciated. Bout ready to call "Ghostbusters"
If I could find the place called "Somewhere", I could find "Anything"
Tim
Jesus cried out and said, "Whoever believes in me , believes not in me but in him who sent me" John 12:44