[ARC5] Mystery Black Box

[J. Forster]

The LORAN-C was a whopping big pulse, into a huge (700' high) antenna. It
was easily visible on a Tek scope without any amplification and just a
small (1') shielded loop and no electronics.

It would have been the ONLY slowly moving pip on the display, if the GRI
was adjusted close.

-John

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




> Sounds like the answer to me.  Now I can just see myself trying to find
> those LORAN C pips amongst all the "grass" created on the APN-4 scope by
> the 56 spark plugs on the PBM!!
> Mike-W6MAB
>   ----- Original Message -----
>   From: J. Forster
>   To: Michael A. Bittner
>   Cc: D C _Mac_ Macdonald ; KE6PPF Jay Coward ; Military Surplus Mail List
> ; ARC-5 Mail List
>   Sent: Saturday, April 26, 2014 6:02 PM
>   Subject: Re: [ARC5] Mystery Black Box
>
>
>   Yes. But LORAN-C can have more SLAVES per MASTER than LORAN-A. Also,
>   LORAN-A has several operating frequencies, LORAN-C only one.
>
>   The box is an LO and one or two BPFs. And possibly an AGC.
>
>   -John
>
>   ==================
>
>   > Other than carrier frequencies, how are LORAN A and C "different
>   > animals"?.  I think both are pulse modulated hyperbolic systems.
> Couldn't
>   > up-converted LORAN C signals be displayed on the APN-4 and used for
>   > navigation with a suitable chart?
>   > Mike-W6MAB
>