I posted an info request a few days ago about dial cord replacement, Yes the panel must come off, remove all controls that penetrate the panel, remove all visible screws, then the big one. the two levers that hold the coils in place have a stud that passes through the panel and interior. they have a 3/8 inch nut located about 1/2 inch above the chassis, somewhat difficult to get too. on mine it was not the dial cord, rather the bronze bushing in the gear that is attached to the cord drum. The bushing was dry and nearly frozen to the gear, can not imagine why, its only 60 years old! The force on the gear pushed it out of engagement range. getting the nuts back on was also fun, I used a piece of large dia solder bent at about a 45 degree angle and just long enough to hold the nut. position the nut at the end of the stud and then try to spin it with another long tool or wire. it will eventually catch and from there on its just dog work. The point of all this is if you have the front panel off for some reason, clean and lub that bronze bushing. The tuning now is very smooth. believe it or not National used a spring loaded double brass gear, sure would not want any slop in the dial pointer!!! shows again the quality of construction in the old stuff. The old stuff will still be working in another fifty or more years, the rice boxes are simple throw aways!!. One more thing that might be of interest, all of my old receivers, HRO50-1, Drake R4, 75A2, 75A4, all are quieter and hear signals that my Ft1000MP mark V can not hear, in addition the Mark V hears things that are not there. Same antenna connected in parallel and also seperated.. That just amazes me. 73 Bernie W8RPW
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