[Milsurplus] Navy LM Frequency Meter... that's a bit DIFFERENT!

[Richard Brunner]

Don't give up!  Hand calibration using internal beats is easy, if a bit 
time consuming, but you don't need the whole book so it's an interesting 
exercise.  It will also be much more accurate than the original 
calibration book.  See "Calibrating the LM Frequency Meter," Gilbert L. 
Countryman, W4JA, QST April 1965 pages 18-20.

Richard, AA1P


On 10/25/2013 09:22 PM, Thomas Adams wrote:
> Ya never know what's gonna show up on Ebay. I'm not certain if I've 
> hit gold, or caught a total dud here.
>
> For use with my Navy RBB and RBC communications receivers, I needed an 
> LM frequency meter; the dials are good,
> but they're not THAT good.
>
> An LM-13 showed up...  online, it looked EXCELLENT, and indeed it IS. 
> This thing looks like it was never issued; it's
> either new or completely refurbished from top to bottom. Not too 
> shabby for 15 bucks and mailing.
>
>
> The FIRST hint that something might be amiss...  the calibration book 
> came in a brown manilla envelope. Never seen
> THAT before...
>
>
> ONE (1) EACH: BOOK, CALIBRATION
>
> USED WITH LM- SERIES FREQUENCY METERS
>
> LORAL ELECTRONICS PART - 44-1002-1
>
>
> Interesting...  because it's a Bendix built meter... so I'm thinking 
> this critter was factory refurbished.
>
>
> The unpleasant surprise...   the book is completely BLANK!!!  It was 
> never filled in with calibration data!!!
>
>
> Anybody else out there ever encountered one of these critters before???
>
>
> I'm tempted to add a frequency counter module (also on Ebay) as a 
> readout, mounted on top in a separate box,
> to make it useful for measuring frequencies.
>
> Either that, or rewire it as a regenerative receiver!  ;o)
>
>
> Mr. T. ,  W9LBB
>
>