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National NC-125
#7

It's finally done !!! The IF alignment was not too bad. Fed 455 into the grid of the mixer/oscillator, and reset all the IF transformers, going over it twice and both ways. It is peaked out so any adjustment lessens the tuning, so... that is that. Then came the overall alignment of the 4 bands. That proved to be a bigger pain in the a$$. I ended up having to pull the chassis out of the main cabinet body, something I really wanted to avoid. Then I went to work. The manual is not really clear, and it took a LOT of trial and error to finally get the hang of what affected what, and how it affected things. The diagrams in the manual from BAMA, the only one I could find, are not really clear sometimes, especially the illustrations, so it is a bit of guess work to figure out which coil is which. There were times that the air turned blue and then I took a little break and played with my dogs, and then went back to work. At any rate it is done, and proves to be a good performer. Tomorrow I will put the chassis back into the cabinet, and button things back up. Then I'll take some final pictures of the radio in action.


Messages In This Thread
National NC-125 - by mikethedruid - 01-19-2021, 01:01 PM
RE: National NC-125 - by mikethedruid - 01-19-2021, 05:46 PM
RE: National NC-125 - by Arran - 01-19-2021, 08:31 PM
RE: National NC-125 - by mikethedruid - 01-20-2021, 09:16 AM
RE: National NC-125 - by mikethedruid - 01-20-2021, 09:09 PM
RE: National NC-125 - by mikethedruid - 01-21-2021, 11:53 AM
RE: National NC-125 - by mikethedruid - 01-21-2021, 11:20 PM
RE: National NC-125 - by mikethedruid - 01-22-2021, 07:48 PM
RE: National NC-125 - by EdHolland - 01-22-2021, 11:38 PM
RE: National NC-125 - by mikethedruid - 01-23-2021, 01:05 PM
RE: National NC-125 - by mikethedruid - 01-24-2021, 01:30 AM
RE: National NC-125 - by mikethedruid - 01-27-2021, 10:44 AM
RE: National NC-125 - by Radioroslyn - 01-27-2021, 12:36 PM
RE: National NC-125 - by Eliot Ness - 01-28-2021, 10:24 AM
RE: National NC-125 - by mikethedruid - 01-28-2021, 02:44 PM
RE: National NC-125 - by GarySP - 01-28-2021, 03:29 PM
RE: National NC-125 - by mikethedruid - 01-28-2021, 03:46 PM
RE: National NC-125 - by mikethedruid - 01-29-2021, 08:50 PM
RE: National NC-125 - by Paul Philco322 - 01-29-2021, 10:07 PM
RE: National NC-125 - by MrFixr55 - 04-03-2021, 08:44 AM
RE: National NC-125 - by mikethedruid - 04-03-2021, 04:28 PM
RE: National NC-125 - by Mtmattking - 11-13-2022, 08:44 PM
RE: National NC-125 - by Radioroslyn - 11-14-2022, 01:06 PM



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