Radio transmits on freq just fine , in coming receive is off about 3 khz's ? Clarifier is nil and does nothing and it wasn't open on RX and TX to begin with.
It needs a PLL alignment
Thank you for your time 8541 and others , about 7.5 volts and the 1.5 you spoke about on the clarifier , no voltage varience center leg of clar but none at d24 either side, I basically had already been there on the checking the clar part but d24 was new to me , although I changed it , still nothing. Any other suggestions ? It's just turning out to be a parts radio about now , I've had my ups and downs with PC-122s over the years , last one that meant anything to me cost while tech changed part after part for about an hour before he figured it out, I felt those minutes ticking like you wouldn't believe . I suppose it could have been worse. Appreciated the help here 8541. SKneither xtal can be suspected or tx would be off as well. so do not replace them.
it is something in the rx steering section of the clarifier. i would suspect a diode is not turning on like it should and allowing the rx voltage to flow thru the clarifier. it could be a bad solder connection or a faulty diode, or even another less obvious and less common component that has failed.
remember, the rx voltage bus feeds the clarifier. the clarifiers output voltage varies as you turn it. this change in voltage causes the 10.2417 xtals frequency to change, which shifts your rx freq. if there is no shifting voltage from the clarifier or very little voltage the 10.2417 xtal runs where it wants to run
i would check the legs of the clarifier. you should have a steady 8v on one leg, a steady 1.5v or so on another and the middle leg should vary as you turn the clarifier. if this checks fine, i'd then move to d24 and make sure there is volage on the both sides and that this voltage varies as you turn the clarifier.
Any other suggestions ?... SK
you shouldn't need other suggestions. you found the problem yourself. lets look at this logically. if i could trouble shoot your radio without seeing it....then you should be able to pick it up from here.
you have 2 out of 3 of things i listed for the clarifier. you have the input voltage (7.5v), you have the reference voltage (1.5v), but you have no output voltage. so what do you think is the bad component?
just to let you know, if you have no voltage at the output of the clarifier then you'll have no voltage at d24. the clarifier feeds d24. so d24 is not your problem, whether you replaced it or not. if you would have had output voltage at the clarifier and at the unbanded side of d24 but not the banded side, then d24 would have been the faughty component.
oh and next time, giving information like, 'hey i checked the clarifer voltages and this is what i have.....', will help guys like me a lot. if you would have listed that in your first post, i could have told you right then what was faughty in the radio.
i wasn't coming down on you, talking $hi! to you, or anything like that at all. and i was not asking for thanks, although i do appreciate that. i was only trying to steer you. you already found the problem, you just did/do no realize it.
if you do not have an output voltage from the clarifier, how can the clarifier be good?? the clarifier is bad. i was trying to give you some circuit theory to help you understand. i just thought you may like to find the problem yourself instead of someone telling you....sorry.
to make it easy and eliminate any confusion...... replace the clarifier and then re-align the pll circuit.