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Title: Notes on Restoring a National NC-300 Post by: Steve - K4HX on December 15, 2011, 08:01:37 PM Thanks to Ken, K6FC for sharing.
http://www.amwindow.org/tech/htm/nc300resto.htm Enjoy! Title: Re: Notes on Restoring a National NC-300 Post by: Jim, W5JO on December 15, 2011, 10:19:29 PM He doesn't mention L6. If you have one of these receivers and L6 hasn't been converted to a crystal oscillator, then I suggest you do. That eliminates a problem that plagued many of these receivers over time contributing to frequency calibration. Suspect cause was humidity causing the coil form to change inductance values, and the setting of that core if very critical. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
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