[Boatanchors] LightSquared

[J. Forster]

I was off a bit on the end of LORAN-A. From Wiki:

"An elusive final variant of the APN 9 set was the APN 9A. A USAF
technical manual (with photographs and schematics) shows that it had the
same case as the APN-9 but a radically different front panel and internal
circuitry on the non-RF portions. The APN-9A had vacuum tube flipflop
digital divider circuits so that TDs (time delays) between the primary and
secondary signal could be selected on front panel rotary decade switches.
The older APN-9 set required the user to perform a visual count of crystal
oscillator timing marker pips on the CRT and add them up to get a TD. The
APN 9A did not make it into widespread military use, if it was used at
all, but it did exist and represented a big advance in military LORAN-A
receiver technology.

[snip]

LORAN-A was terminated in the United States on December 31, 1980 and the
restrictions on amateur radio use of the 160-meter band were lifted."

-John

===============



> LORAN-C was actually very good. I could repeatedly get fixes <100'.
>
> If anybody has a manual or other doc for an APN-9-A, please email me
> off-list. Note: Yes, an APN-9-A!! This is not a typo. It does actually
> exist. I have one. They are not mythical.
>
> Best,
>
> -John
>
> ==================
>
>
>
>> WA5CAB wrote:
>>
>> "And what do they all do when they lose GPS?"
>>
>> Why, LORAN of course!  APN-9, anyone?  Should work as well as a
>> LightSquared GPS.
>>
>> Drew
>>
>>
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