The circuit board was placed in a fixture and then closed down on to a "Bed of Nails."Yea, tune-ups on a new radio are highly overrated IMO. As an example, I bought a box load of NOS Cybernet 02A boards that Hy-gain was dumping. Shortly after I was given a radio that was so badly abused, broken slugs, damaged coils etc. that I decided to replace the entire board. I was totally taken back when I discovered all the coils and IF’s were spot on if not extremely close. Keep in mind these boards were never previously installed. It’s beyond thinking this was merely a coincidence, but it did prove to me that somehow the manufacture was able to tune everything before the board was ever installed. Was the board placed on some jig and tuned, or was the individual components tuned before they were soldered on the board? Possibly both, but either way the manufacture did a remarkable job.
The nails are spring loaded pins and are connected to a computer and the alignment is done. Common practice in electronic manufacturing.
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