Nicholas.
You are very much on the right track. The Charging Boards were a multifunctional item, meant to fill in the gaps and shortcomings on many of the different wireless vehicles in service throughout the war, and at the same time, fill the need for properly float charging wireless batteries when a wireless set was being operated in a 'remote' location. I use quotes around the word remote because the term covers a broad spectrum of locations outside of the wireless truck.
Many wireless vehicles in service completely lacked a built in means of properly charging wireless batteries but may have had built in lighting systems. Many lacked even built in lighting and you would most definitely not get built in lighting if you were operating out of a tent in some 'remote' location. So the Charging Board was created.
Take the 2K1 and 2K2 15-cwt Wireless Boxes for example. They were the last of the line in the wartime 15-cwt series wireless boxes. By the time they came into production, all the mistakes and shortcomings of the earlier iterations of the 15-cwt wireless box had been taken into consideration. It had it's own interior lighting built in with auto blackout capability. It had a built in float charging system for the wireless batteries. To operate any of this equipment, the Charging Boards were totally, absolutely, positively, redundant. If the wireless equipment has to relocate from the truck to a 'remote' location, then the Charging Board comes into play.
As is written on page 45 of the Wireless Set No. 52 manual, when talking about the Charging Board, if it is found that the wireless vehicle in use is already fully equipped for lighting and charging batteries, the Charging Board is stored under the central part of the wireless table. If the wireless vehicle was an older model lacking in either proper battery charging capability and/or interior lighting, the Charging Board was mounted on the wall of the vehicle in a convenient location and became an active part of the working of that vehicle, only being removed if the equipment went 'remote'.
The factory wireless table from Wilson that was installed in the 2K1 and 2K2, wireless boxes came equipped with a deep drawer on the left side of the desk. The central and right side belly of the desk was bare. Yes. Absolutely. I have seen a handful of these desks over the years with a long shallow drawer installed under the central part of the desk. Not one of these drawers I have seen matched any of the others. They were all very likely field mods, built locally for whatever reasons.
Robert has suggested the Charging Board would be mounted under the rear right side window of the 2K1 and 2K2 Wireless Box. I have never seen signs of one being mounted there after close examination of over four dozen of these boxes. Consider the fact that in that location, two Enfield Rifles are stored along the side wall of the Generator Box for the Wireless Operation and Cypher Clerk. Not a practical place for the Charging Board to be placed with four horking great knobs sticking out from the front of it.
David
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