Antenna support, aluminum

[BCA]

Thank you Chris and Colin. I add that the early aluminum style (Chris's #1 model) has an assembly number (according to my Canadian microfiche) PC 82495 C224, 5955-21-106-4113. I agree with Chris that the upper portion is -220 and the lower portion is -222. This lightweight version is certainly easier to store and use.

[Chris Suslowicz]

Originally Posted by BCA

Thank you Chris and Colin. I add that the early aluminum style (Chris's #1 model) has an assembly number (according to my Canadian microfiche) PC 82495 C224, 5955-21-106-4113. I agree with Chris that the upper portion is -220 and the lower portion is -222. This lightweight version is certainly easier to store and use.

I think the PC stands for Procurement Catalogue, the 82495 is the 'group' number for the complete unit, the C to indicate "Canadian" and the -nnn is the individual component number (allocated sequentially by the designer).

On that basis:

PC84295C-224 is the Mast Insulator (lightweight)
- composed of -
PC84295C-220 upper casting
PC84295C-221 probably the glazed ceramic insulator
PC84295C-222 lower casting
PC84295C-223 probably the knurled screws for feeder connections

this is an earlier design/specification than the steel with phenolic insulator:

PC84295C-285 Base, Aerial Assembly
PC84295C-286 top casting
PC84295C-282 bottom casting
PC84295C-28? locking lever
PC84295C-28? pivot pin for locking lever
PC84295C-28? Phenolic impregnated paper insulator
PC84295C-2?? knurled screw - may be -220 as existing part

The final (ceramic) insulator specified for WS52 and WS43 (etc.) is:

PC84295C-295 (Which I suspect should really be designated the Mk.I*
because Mk.I is the first model issued (and becomes the Mk.I when a modification is made, which this certainly counts as).)

I need to find the various working instructions (etc.) for the mast kit, and see what level of detail is shown. A "Parts Identification List" would be good, of course, and may exist on that wonderful microfilm. (Which has interesting details about other things I wasn't aware of (such as the non-existence of Aerial Base No.19 - that was produced as a proposed replacement for Aerial Base No.10 Mk.2 that allowed the aerial to tilt, made it into various installation kit lists, but was abandoned in favour of Adapter, Aerial, No.1 ZA.27220 as an addition to the existing Base No.10 Mk.2.)

I have a library (of sorts) to search and sort/catalogue, but not tonight!

Best regards,
Chris.