MLU FORUM - Wireless Set 18, 48 or 68 static battery

MLU FORUM (http://www.mapleleafup.net/forums/index.php)

- The Wireless Forum (http://www.mapleleafup.net/forums/forumdisplay.php?f=29)

- - Wireless Set 18, 48 or 68 static battery (http://www.mapleleafup.net/forums/showthread.php?t=26187)

Wireless Set 18, 48 or 68 static battery

The Static Battery Box for the WS18 provides HT (144 volts), Grid Bias (-12 volts) and LT (3 volts) as follows:

HT + Grid Bias = 156 volts with a tap at 12V, from 2 x 60 volt batteries (120V) + 24 volts from two of the "8-cell refill" batteries, totalling 144 volts, and a third "8-cell refill" battery to provide Grid Bias.

The filament (LT) supply was provided by two "O" cells (which may have been either a single large cell or a cardboard case with several cells connected in parallel).

The static battery was considerably higher capacity than the 'battle battery' and the HT section would have lower resistance so that the 6-volt difference would not be a problem.

There was a US manufactured equivalent for the WS48 that is almost identical except that the cells/batteries listed for filling it are American types.

Your second "static battery box" is actually the HT battery for Wireless Set No.1, and is filled with 20 of the "8-cell refill" batteries to provide 240 volts HT.

The "8-cell refill" consists of 8 approximately AA-sized cells in series, with a negative lead and two brass terminals for +6 and +12 volts. They were used in various remote control units to provide relay power, and were still in production in the 1970s or later.

Chris.

Thanks for all this informations.
So if i have understand, the only difference of the WS N°1 set static battery i have and the WS18 set static battery is the marking on the lid.
I look inside, and it was the same you can see on the FIG 6 coming from the WS 18 operating instruction.
regards
daniel

This label was sticking inside the WS 18 set static battery lid.

http://i35.servimg.com/u/f35/17/20/17/25/50100410.jpg

Quote:

Originally Posted by wendel daniel (Post 228031)

This label was sticking inside the WS 18 set static battery lid.

Ah... my mistake.

The W.S. No.1 used a 228 volt HT battery, consisting of 20 8-cell refill batteries (one was a spare) and one and a half of the batteries were used to provide -18 volts for grid bias.

The 240 volt battery was for the W.S. No.11, used a 2-pin connector, and was filled with four of the 60 volt HT batteries.

The WS18 (etc.) Static Battery Box (providing HT, Grid Bias and LT) needed a 5-pin connector and they used a British 5-pin valve socket for the connector.
(It was later fitted with a metal collar to prevent the plug being forced in with the wrong alignment, and damaging the set.)

Regards,

Chris.

p.s. I think your battery box is a WS18 (or WS48) box with the wrong lid (for the WS11) fitted. :(

Chris.

Thanks for all information you give me.
Regards
daniel from france

~scratches his tete~

My Primary Battery Box appears very close to Daniels one.

I'm guessing the 'MPL/39' and 'GEC/40' are manufacturers and manufacturing dates?

The diagram is glued inside the lid and is, again, very similar.
Different manufacturer with a different draughtsman?

I'm just trying to clarify what I have here Chris?

Brent. :doh:
N.Z.

Have you more photos from your box. It's just a wonderful item you present us.

Quote:

Originally Posted by things_green (Post 228249)

Oh, very nice.

GEC will be "General Electric Company" (the British, not the U.S. one), and that's the WS18 battery box. (/40 will be the production date, and coincides with the introduction of the WS18.)

It has a very early stores code because they only issued ZA numbers around 1940 and initially in alphabetical order, so you get things like Aerial Coupling Units with low numbers ('A' for WS1 ZA.0021, B for WS2 & WS9 ZA.0025) and stuff at the other end of the alphabet with high numbers, regardless of the original date of introduction (e.g. W.T. Sets MB/MC which were a WW1 tank set (morse only) got ZA.8470 - noted for "training use only").

It's interesting that Wendel's box has the wrong lid (almost certainly a workshop replacement for a damaged original using an old WS11 box as a parts donor), and also that the HT refill batteries are specified as 63 volt!
(Also his label shows US battery equivalents in places.)

I've not come across a 63 volt battery before, but they may have existed and been dropped at a later date in favour of a standard 60 volt one (used with the High Power version of Telephone Set 'F' and the WS17.

I must get my WS48 battery box out and photograph that.

Chris.
(I have the empty shells (no lids or fittings except for the valve socket) of a couple of WS18 battery boxes - they were converted to drawers by someone!) :eek:

as always, the breadth and depth of your knowledge astounds me Chris.

thanks for the clarification.

Brent.
N.Z.