[Milsurplus] LM practical use

CL in NC mjcal77 at yahoo.com
Wed Jun 10 09:48:04 EDT 2020


When I first got my BC375 up and running several years ago, thought it would be fun to do SKN on New Years.  I was on 160 meters, receiving with a BC348, heard a nice CQ and thought I would answer him.  Then it dawned on me I had no way to zero beat the BC375 to his signal with a BC348 that was wired to the 375 control relay and  fully muted when the 375 was transmitting. I could have fired up another receiver, hunted for the the CQ'er, keyed the 375 into a dummy load and walked it down to the freq, but used the LM instead.  Of course, by the time I got the LM going, that CQ caller was long gone, and I never made any SKN contacts with it, but I did practice zeroing techniques with the LM, 348, and 375 and have gotten pretty good at it now.  As a side note, I built an outboard  power supply for the LM with a one tube audio amp and speaker,  and plug that into the LM phone jack so I can hear the transmit zero.  Thought about a mute bypass switch for the 348, but this is more fun.

I had one LM without a book, I tried that program that is around for making your own book, but never got it to work.  Instead, I wrote down all my favorite freqs, and using another book to give me ball park dial numbers to use, made a chart of freq. counter vs dial numbers so I knew where I was.

Charlie, W4MEC in NC


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