[ARC5] Upgraded ARN-5A with 12 channels??

[Nico van Dongen]

I'm restoring a ARN5 / BC-733 ILS system and have found all of the parts
except for the BC-732 control box.
Recently I found complete set for sale complete with cabling and control
box. on the pictures of the set I could see that the connectors on the
BC-733 where missing but because the price was (very) moderate I bought the
set.
Now it has arrived I see that this is a slightly different installation.

Both the ARN-5, the BC-733 and the BC-732 control box are upgraded to 12
channels. The visual indicator is very much like the original ID-101 but
has the horizontal en vertical flags. The indicator has a post war British
plug so perhaps the conversion is Britsh??.
The ARN-5 is an original ARN-5A with one additional plug and and the ID on
the front reads; R89P/ARN-5A/12 (the R89P  and /12 are handwritten
additions to the original ID.
The BC-733 has handwritten /12 to the original ID.
The BC-732 control box has handwritten -12 to the original ID and the
channels switch has now 12 positions A to L

So now besides getting this 12 channels set working again I'm still looking
for a BC-732 control box.

Anyone that is familiar with this 12 channels installation and perhaps has
a wiring diagram?

Nico - PA3ESA
Netherlands
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