[ARC5] Navy LM Use

[Bill Cromwell]

On 05/22/2013 03:01 PM, Sandy Blaize wrote:
>
>
> Hello all.  We might also note that one of the most popular HF Navy 
> receivers that was praised by many an old Navy CPO was the RAL-7.  IT 
> HAD NO calibration, only a logging scale!  But it could be returned 
> very accurately to even an HF SSB channel with very good accuracy!  
> This made the LM freq. meters essential for accurate settings!
>
> Personally I have always preferred the LM series to the BC-221 as it 
> is more compact.
>
> 73
>
> Sandy W5TVW

Hi,

That depends on how you define "calibration". I regard that logging 
scale and chart as "calibration". On my RAK with chart I made up using 
some reference points and spread sheet I can dial up/preset a frequency 
quite well. If I don't account for the CW offset I end up at zero beat 
almost every time. Always on the taget transmitter. Even the LM has just 
the logging dial. It does have that xtal and the "corrector" but if you 
make the tyupe of chart I have with the RAK you don't need the xtal most 
of the time.

73,

Bill  KU8H