[Racal] help ID an RA17 version

[Joe LeKostaj]

Hello.

This is my first post to the Racal reflector. From reading the 
archives, there seems to be a lot of ardent Racal fans out there! 
Hope I can tap into your expertise to identify the exact model of 
RA17 I've got and locate the proper documentation.

First off, the model number tag says RA17 so there's not much mystery 
there. Serial number is N402. But if the receiver were an RA17-C12, 
would the model number tag say that? Or must one determine that it's 
a -C12 from inspecting its features? For example, it _does_ have 
U.S.-numbered tubes in all positions and an SO-239 antenna connector. 
The widest I.F. bandwith is 8 kc, not 13 kc.  There is only the 50 mW 
3 ohm output, no 1W output.

The receiver seems to differ in a few ways from what I believe to be 
Mk I / Mk II RA17s I've seen on the Web. For example:
- The meter switch is 3-position rotary (not 2-position toggle) and 
is original. The meter has a hand-lettered S unit scale. I thought 
that the 3-position meter switch first appeared with the Mk 3 or 
RA17L.
- There is no input voltage selector switch on the back panel, just 
the two fuseholders.
- The first VFO module has six adjustable coils which are adjustable 
through holes in the chassis, but there are not six coil cans on the 
top side of that module.

Based on this description, can anyone confirm which version of RA17 
this is? And where can I find the corresponding schematic and service 
manual? I will appreciate any assistance.

Tnx &73,
Joe K9LY