AN/APX-6

Maury Markowitz

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I'm trying to understand the history of IFF and I've become confused...

I know that Mark III used ~176MHz as its primary frequency, and had only one "mode".
I also know that Mark X used ~1GHz and had three modes.

So here's the confusion:

http://www.iwm.org.uk/collections/item/object/30117414

This page at the IWM states that the AN/APX-6 is part of Mark IIIG. However:

http://members.home.nl/a.k.bouwknegt/index_bestanden/APX6.htm

This page has images that show it has three modes, and states it operates at ~1GHz.

Ugh.

Anyone have some clarity here?
 

yellowaster

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I don't believe APX-6 was part of IFF Mk 3 or 3G. Take a look at references to SCR595 (ABK) and SCR695 (ABF) which were the US equivalents.
 

Maury Markowitz

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So that seems to suggest that this is a Mark V unit, which British sources suggest was not used operationally. Perhaps they mean "... by the RAF.".
 
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