Variometer mounting to underside of Aerial Base

[Chris Suslowicz]

Originally Posted by Patrick Johnson

Hello,
I believe the attached line drawing image came from an ebay auction within the past year or so. Does anyone have a scan of this document at higher resolution? On my scan I can make out a description of the parts but not the actual part numbers.

Also included is a photo of some of the parts making up the 19-set Installation Kit for a tank. I am looking to buy the following parts used to attach the variometer to the aerial base:
1) Plates, Packing No. 1 ZA 2948 This is the thick rectangular plate centered in the photo, the Aerial Feeder Assembly No. 4 fits through the large hole and the small hole is for the variometer's guide pin.
2) variometer adapter washer, no part number available.
3) variometer adapter plate, ZA/CAN 1231. This is the square plate with the round hole, shown on the right hand side of the photo.
4) Also looking for two examples of the microphone loops shown in the attached photo
As usual, any assistance would be greatly appreciated!
Regards, Patrick

Ah, right... that explains the washer in the Pershing (T26E1) installation kit - it's to cover the large hole for a U.S. aerial feedthrough in the turret roof, and the "Plates, Packing" is to centre the aerial feeder in the hole.

As to part numbers, from the top:

ZA.1763 - Aerial Base No.8
ZA.1868 - Connector, Pigtail, No.1
ZA.1825 - Aerial Base No.8, Mounting No.1
ZA/CAN.1232 Variometer adapter washer (centres the aerial feeder in the hole and sits on top of the adapter plate, I think)
ZA/CAN.1231 Variometer adapter plate (supports the adapter washer and covers the large hole up)
ZA.2948 - Plate, Packing, No.1 (to adjust for thickness of turret roof)
ZA.2957 - WS No.19 Aerial Feeder Assembly No.4

Hmmm... on the Pershing kit list, I have:

5 ea. 17G59 Hooks (for microphone and headgear) ZA/USA1052
1 ea. 57G512 W.S. No. 19 Variometer Adapter Plate (WA-623) ZA/USA1051
1 ea. 93G767 W.S. No. 19 Variometer Adapter Washer ZA/USA1053

and on a cautionary note:

6 ea. Screws, Hex. Hd. Cad. 1/4 BSF x 1/2" (Aerial Base No.8 to Mounting No.1)

So beware: the mounting bolts are cadmium plated (as well as the microphone hooks)!

Finally, ZA/CAN.1232 - the adapter washer - is described in FZ256/3 as: WASHERS, Steel, 2-in. OD, 3/4-in ID, 0.125-in.
(This is from the Grizzly installation kit section)

Hope this is some help,

Chris.