It looks like you would really need to use a spectrum analyzer to do this properly.
@althepal6818
Жыл бұрын
Frequency counters were not common and precise when this receiver and his alignment instruction were conceived. So, knowing the exact freq is not so important. It is why the procedure require to rock the frequency. It is kind of a sweep to peak or dip. Actually, my modern RF generator is shitty for this type of alignement as I have to punch the freq in.
@Kennynva
6 жыл бұрын
Can you use new, current crystal and replace the old one in the radio, and HOPE that it is closer than the original, or is this going to be the same issue??? I was just reading on Antique Radio Forum that says to hook the crystal to an oscilloscope to get the filter crystal frequency, then at least you know that...I am very confused..and will now try to see all of this on an oscilloscope...
@Kennynva
8 жыл бұрын
Am I that one person that asked...????? if not ..I really needed this video to help me too..thanks for this video...
@tomtektest8042
8 жыл бұрын
Yes, I usually don;t identify viewers unless they want to be known but your questions reminded me that I had lost the alignment video segments from the SX62 so this was an opportunity to fix that in part. Glad you liked the video and good luck with your alignment.
@Kennynva
8 жыл бұрын
Thank you for taking the time to do this..and I do not mind at all that the world knows it was me asking..I understand a little more now, but not fully...I do know I need a better SG or I need to buy a frequency counter...so I can tell what my SG if putting out..There is NO capacitor to adjust on my SX-71, I just have the coil, or slug that I have to adjust...it is "U' coil that needs adjusting... again thanks..and if you think of anything else on this subject please let me know..
@Kennynva
8 жыл бұрын
Upon looking I do have a trimmer pot that is connected right to the crystal..I guess that is it...It is C27 on my schematic...
@Kennynva
8 жыл бұрын
Do you think you could do a demo of this adjustment..so i can see how its done...Sorry to be such a bother...there is no one I can get to help me here ...thanks..
@tomtektest8042
8 жыл бұрын
I would prefer to not reopen the SX62. It is quite heavy and a real job to move around so I will not be moving it again for some time if ever. I don't think that the SX62 is the same as the SX71, anyway. Someday I hope to restore my SX71 but that will probably be some time in the future. When I do I will make sure to try the Crystal Filter adjustment. In the meantime I suggest trying the procedure in the SX71 manual available from BAMA.
@Kennynva
8 жыл бұрын
Can you install a different crystal..or a more modern one that would be more accurate....I do understand that a new crystal might have the same (problem) as the one I have..
@althepal6818
Жыл бұрын
Xtal frequency is not important. So much, that they are rarely directly on IF freq.
Пікірлер: 16