[MRCA] [Milsurplus] Backpack GPS receiver

[Al Klase]

Ray,

At first glance, I though your rug was a surface-mount IC. 🙂



73,
AL

On 9/30/2025 10:20 AM, Ray Fantini via Milsurplus wrote:
>
> Anyone who knows me understands that I don’t only work in obsolete 
> military radios but also dabble in computers and other arcane devices. 
> Picked up a couple things at the Gilbert Red Ball show. One is a ADSID 
> III seismic sensor and that’s an entire story on to itself but also 
> picked up a old backpack portable first generation GPS system. I think 
> this is the military version of the Magnavox MX5400 or maybe a MX6102 
> but have no real idea beyond that. Unlike the older MX4102 terrestrial 
> Navistar system I suspect this is a GPS system being it has the 1575 
> MHz patch antenna. Its also powered by a 5590 battery and comes all 
> mounted up to a Allice frame. Anyone have any ideas about this? 
> Suspect that the old GPS systems had some form of issue with date and 
> year display but don’t know if that will keep it from displaying 
> something.
>
> Attached are some pictures.
>
> Ray F/KA3EKH
>
>
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-- 
ARK Sig Block Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/
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