[ARC5] [Milsurplus] WTB Original LM-10 manual

[Kenneth G. Gordon]

On 25 Mar 2022 at 13:38, Robert P. Meadows wrote:

> Folks, To the best of my memory and knowledge, the LM series of
> "frequency meters" were individually calibrated, and the book for same
> serialized to the instrument. I have memory of a photo of the
> calibration setup, as well as the printer that made the calibration
> books.

Yes. That is correct. The calibration books are unique to each "freqency meter". And I too 
remember seeing a photo of the calibration equipment at the time. It was quite large. The 
technology of the time was quite impressive too.

> Making a calibration book by any means absent the actual measurements
> for the specific LM is useless if the instrument is to be used with
> any degree of accuracy. R 

Well, Bob Keyes' program does a good job of recreating a calibration book, although the 
result can then be tweaked for better accuracy after that is done by using a good, accurate, 
frequency counter at selected frequencies. Making an accurate calibration book is a 
time-consuming process, but others have done it.

If you no longer have a DOS based computer to run it on, you can install one of the DOS 
emulators on your computer and run it by that means.

Ken W7EKB