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Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment. |
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1st Oct 2014, 7:59 pm | #41 |
Retired Dormant Member
Join Date: Jan 2011
Location: Egham, Surrey, UK.
Posts: 219
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Re: Identify vintage Radar components
Interesting that when I worked on AA Radar No.3 Mk.7 they ran off ran off the 50Hz mains supply (maybe 3 phase) as there was no companion petrol generator set in use.
I do remember the EMERS were about a foot thick !! |
1st Oct 2014, 8:56 pm | #42 |
Octode
Join Date: Nov 2010
Location: Ross-on-Wye, Herefordshire, UK.
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Re: Identify vintage Radar components
Bob,
yes, well if I had the complete EMER set, they would be a foot thick. I have just O192 - tech description - so its a mere 2". You are quite right that the basic supply is 50c/s 230V 3 phase - min power 12kVA! But a couple of the subsidiary generators are 80V 1500c/s, which is interesting in the context of this thread. We noted that this supply type originated with the airborne radar equipment during WWII, but it subsequently crept into equipment like this, that you would expect to be quite happy on 50c/s supplies. Richard |
1st Oct 2014, 10:16 pm | #43 |
Retired Dormant Member
Join Date: Jan 2011
Location: Egham, Surrey, UK.
Posts: 219
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Re: Identify vintage Radar components
Yes 12KVA is no surprise considering the Aircon in the cabin to stop the operators from melting with the door closed. I see no use for the 1500Hz supply as even the magslips worked with 50Hz and the servos were DC. What fun I had locking on to RAF jets that wiggled about to shake off the tracking!
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3rd Oct 2014, 4:18 pm | #44 |
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Re: Identify vintage Radar components
Richard
Most interesting. Please see attached photo of Amplifier Unit underside view - looks like an exact replica to me. I've included underside views of the two other chassis as well just in case you come across any more drawings. I see that on 31 July 2012 a Radar Handbook was ebay'd by g4xwd with the following description: "ARMY EMER - EQUIPMENT RADAR F.A. No 1 Mk 1 October 1946. This EMER, TELS 382, almost A4 in size is a detailed technical book covering the operation of this mobile vehicular radar set up. There are many circuit diagrams, drawings and parts lists with what appears to be full working descriptions of their operation. This is a book, that true to its just post war origins packs a lot of information into its pages. There looks to be 93 pages in this book but due to the method of numbering it is not possible to be exact without carefully counting. It is in good fully readable condition but is a little dirty and dog eared. Some pages have pencilled notes added. There is no binder but the pages are punched ready so would be easy enough to bind". Unfortunately the buyer's contact details are private; it might have provided a few more details on the other gear. Jon |
3rd Oct 2014, 10:17 pm | #45 | |
Octode
Join Date: Nov 2010
Location: Ross-on-Wye, Herefordshire, UK.
Posts: 1,654
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Re: Identify vintage Radar components
Quote:
I was the buyer of this EMER from Jim, G4XWD. So you can ask me anything more you want to - but I have had a fairly thorough read of the document and I don't see a lot more that's relevant here. I will have another look for you and see if any other diagrams bear any resemblance to the other bits you have. Richard |
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3rd Oct 2014, 11:40 pm | #46 |
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Join Date: Mar 2008
Location: South Yorkshire, UK.
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Re: Identify vintage Radar components
Richard
It did cross my mind that you might have been the purchaser! I appreciate that you've already had a good look through for anything else relevant - thank you. Interesting that the F.A. radar used 80v 2000c/s. In a Radar circuit description in "Radio Engineering" by R C Norris the Radar prf was derived from this supply supply frequency. Perhaps not a reason for using 2000c/s in a new design but, as mentioned in a previous post, it would be unavoidable if earlier designs were being reused. I'm still planning to look at the SU Radar Archive Tomlin Collection - if I find anything interesting I'll post back. Jon |