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Chat => Tech Chat => Topic started by: burakkucat on May 27, 2015, 09:39:40 PM

Title: Level Measuring Set No 46A
Post by: burakkucat on May 27, 2015, 09:39:40 PM

Prowling around the nooks and crannies of eBay, I came across one of the above --

http://www.ebay.co.uk/itm/391153790313

It looks to be in very good condition. The only problem is that I do not possess a rack in which to mount it.

Title: Re: Level Measuring Set No 46A
Post by: 4candles on May 27, 2015, 09:47:39 PM

Who needs a rack? Just cut a hole in your bureau.   ;D

(https://forum.kitz.co.uk/proxy.php?request=http%3A%2F%2Fi132.photobucket.com%2Falbums%2Fq40%2F4candles%2FPlusnet%2Fwo2_zpsb8beb6b5.jpg&hash=cf40b8f546030617669672de92e097e98d804c72) (http://s132.photobucket.com/user/4candles/media/Plusnet/wo2_zpsb8beb6b5.jpg.html)

Title: Re: Level Measuring Set No 46A
Post by: burakkucat on May 27, 2015, 09:59:10 PM

Ah yes. Now I remember you showing that picture previously.  :)

Title: Re: Level Measuring Set No 46A
Post by: licquorice on May 27, 2015, 10:04:20 PM

Brought back a few memories  :) :) Don't know why it's described as 'Strowger' though, nothing to do with clockwork.

Title: Re: Level Measuring Set No 46A
Post by: jelv on May 27, 2015, 10:36:10 PM

Quote from: burakkucat on May 27, 2015, 09:39:40 PM

The only problem is that I do not possess a rack in which to mount it.

This got me wondering as it needs a 19" rack. Modern IT equipment uses 19" racks (e.g. servers and network equipment); telephone exchanges used 19", I believe war time aircraft rack mounted radio sets used 19" - so what was the first thing to set the 19" standard that we still use today?

Title: Re: Level Measuring Set No 46A
Post by: burakkucat on May 27, 2015, 10:46:52 PM

Wikipedia has a 19 Inch Rack (https://en.wikipedia.org/wiki/19-inch_rack) entry. It appears to be an American standard, dating from 1934.

Title: Re: Level Measuring Set No 46A
Post by: licquorice on May 28, 2015, 08:31:42 AM

I don't believe GPO/BT ever used 19" practice. Their racks were a different size and practice. Early transmission equipment was mounted in Type 42, followed by Type56 and Type 62 racks and latterly TEP1E. I can't remember the dimensions now but were definitely not 19" practice.

Title: Re: Level Measuring Set No 46A
Post by: tickmike on May 29, 2015, 09:47:53 PM

We used many 19" racks on the Railway Research.

http://www.traintesting.com/images/apt%20interior.jpg
http://www.traintesting.com/images/apt%20interior%201.jpg
http://en.wikipedia.org/wiki/Advanced_Passenger_Train