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| Transmitter / Receiver TR1143 |
| This page started March 2000, after I found some TR1143 parts, with a request for information. Thanks a lot for all the response!!!. Below the results: |
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Transmitter Unit Type 50: The transmitter is probably British from WW2. The 7 tubes are missing. It has a crystal oscillator, three multiplying stages and an output stage with two tubes push-pull. The first 2 tubes are maybe EF39 (VR53) and probably a small diode EA50 (VR92) is used for the meter circuit (2 way meter receptacle on front).
I checked my tube databooks and found that the TT11 could have been used for the other 4 tubes. Receiver Unit Type 71: The receiver belongs to the same set. It is very incomplete. Only the MF stages are still present. The rest was removed. It has some tubes in it: 2x VR91 (EF50), a VR53 (EF39) and an AR21 (EBC33). |
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Transmitter Unit Type 50 Ref No 10D/1234 A M Serial No 2068 Output frequency = Crystal Frequency x 18 |
Receiver Unit Type 71 Ref No 10P/13052 A M Serial No 36435 For Crystal Frequency See Chart |
Receiver Unit Type 71 Ref No 10P/13052 A M Serial No 37887 For Crystal Frequency See Chart |
2nd receiver added 2000/12/09 |
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Thanks to: Louis Meulstee - Wireless for the Warrior. The history of British Army Radio ac6v - Amateur Radio & DX Reference Guide Richard Hankins Andy Jackson Ray Robinson - Rays_home Richard Castle Nico van Dongen Jan van de Riet |
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2000/03/28 I will make a summary here of all info e-mailed to me. Unfortunately I had no time today. (work late) Thank you all for your effort and responses!!!! Frank Very short: All seem to agree the units are part of a British TR1143 or TR1143A of the Air Ministry, used by RAF. The TR1143 is equivalent to the US SCR522. |
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2000/03/29 All e-mails I received are placed below, (I hope you don't mind) except for 2 e-mails between Louis Meulstee and me which were in Dutch and did not contain relevant data with respect to both units. Thank you all for your responses !!! |
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From: Frank Philipse Newsgroups: rec.radio.amateur.boatanchors Subject: Anyone any info about this tx/rx set? (type50 & type 71) Date: Mon, 20 Mar 2000 22:29:37 +0100 Anyone with some information about this transmitter/receiver? Is there any documentation anywhere? I have no idea what it was used for, etc... All I know can be seen at http://home.wxs.nl/~frank.philipse/frank/type50.html Thanks in advance, Frank To: Frank Philipse Subject: Unknown set Date: Tue, 21 Mar 2000 15:56:16 +0100 Newsgroups: rec.radio.amateur.boatanchors To: Frank Philipse Subject: Re: Anyone any info about this tx/rx set? (type50 & type 71) Date: Tue, 21 Mar 2000 12:31:30 -0800 UK.RADIO.AMATEUR -- 73 from Rod in Oceanside, Ca ======================================================== AC6V INDEX TO DX AND HAM RADIO FEATURING 100+ PAGES, 700 INDEXED TOPICS, AND 3000 LINKS Over 580,000 Visits On The Counter http://www.ac6v.com - General Ham Pages http://www.ac6v.com/pagedx.html - DX Reference Pages To: VINTAGE_RADIO Cc: Frank Philipse Subject: Obscure sets - and ideas? Date: Mon, 27 Mar 2000 18:02:14 +0100 Like the author (Frank Philipse), I am interested to know what the origin of these sets is - haven't come across them before. These are not British Army numbers (AFAIK), but could well be RAF numbers - they went in for these "type" numbers at one time - and very confusing they can be. For instance a Rx type 88, is also the R1475 - and not to be confused with the WS No.88 - a post war manpack! To: Richard Hankins Subject: Re: Obscure sets - and ideas? Date: Mon, 27 Mar 2000 23:56:47 +0200 Thanks for supporting me in my quest.... My posting has become a different discussion as I had hoped for. Funny though. I had an e-mail from L.Meulstee, stating: "the units you have are to my opinion part of WW2 British 4-channel VHF AM air transceiver TR1143, which can be compared to the US SCR522 (BC-624/BC625)." His webpages: http://home.wxs.nl/~meuls003/home.html He also wrote me if he should find technical data about the TR1143, he will email me. Best regards, Frank To: Frank Philipse Subject: TX 50 rx 71 Date: Tue, 28 Mar 2000 10:20:47 +1000 It looks similar to the English version of the SCR-522, a TR11... something -- Regards Ray Ray Robinson VK2ILV http://www.shlrc.mq.edu.au/~robinson/museum To: Frank Philipse Subject: FW: Obscure sets - and ideas? Date: Tue, 28 Mar 2000 09:33:05 +0100 someone else with the same idea Richard -----Original Message----- From: Richard Castle To: Hankins, Richard 'VINTAGE_RADIO' Cc: Frank Philipse Subject: Re: Obscure sets - and ideas? Sent: Tuesday, March 28, 2000 8:16 AM I note from the ident tag on the front of the unit, it has a section (10P) and reference (13052) number. This would indicate that it is RAF as well as the Air Ministry logo. Richard Castle Audio Visual Presentation Services University of Southampton To: Frank Philipse Subject: FW: Obscure sets - and ideas? Date: Tue, 28 Mar 2000 09:32:20 +0100 here is some information on your sets - definitely RAF. Richard G7RVI -----Original Message----- From: JACKSON Andy To: Hankins, Richard Subject: RE: Obscure sets - and ideas? Sent: Tuesday, March 28, 2000 8:06 AM Definitely RAF, definitely WW2 era - viz the A<crown>M (Air Ministry) and 10P/xxxx. reference numbers . But that's all I know! I've never come across these either. I came saw a very recent (end of 1999) RAF publications list the other day and was amused to note that still listed as available (and therefore in-service somewhere?) was technical documentation on T1154 & R1155, R1475, AR88D and the army WS31 & WS46! Old sets never die? 73, Andy Jackson G8JAC To: Richard Hankins Cc: Frank Philipse Subject: RE: Obscure sets - and ideas? Date: Tue, 28 Mar 2000 09:47:52 +0200 It's a small world, I think I picked-up these sets some 8 years ago in Belgium. They came in a batch with more interesting material because both units are beyond repair or restoration, I sold them some 4 to 5 years ago. I did some investigation at the time and I was told these are parts of a VHF installation that was the standard Air Ministry com. set in fighter planes like the Spitfire. I might be wrong but I think the installation was the British equivalent of the SCR 522. You can't recognize the parts because all the tuning gear is gone and both units are normally housed in a cabinet. That is also the reason why the unit numbers are not familiar, normally you don't see them without the housing and the housing has a different number. 73's Nico PA3ESA To: Frank Philipse Cc: Louis Meulstee Subject: RE: Obscure sets - and ideas? Date: Tue, 28 Mar 2000 10:54:22 +0100 I have quite a lot of technical information about the TR1143. It is in A.P.1938 chapter 13 - I have an original copy here. Unfortunately it doesn't show any pictures of the equipment, but what it does say is that the TR1143 consisted of the following units: Transmitter type 17, Amplifier type 18, Receiver type 19 - so that does not agree with the numbering of your units. The valve line up of Receiver type 19 is VR91 (RF amp), VR91 (mixer), VT52 (oscillator), VR91(frequency multiplier), 2 x VR53 (1st and 2nd IF amplifiers), VR91 (3rd IF amplifier), VR55 (detector and squelch). The set has no audio stages - the audio being handled in the separate audio amp system. The transmitter type 17 has 7 valves in all: 2 x VR53 (oscillator and 1st trebler), 2 x VT501 (2nd trebler, and doubler), 2 x VT501 (PA), VR92/VR78 (monitor). I note that the valves agree to a certain extent with those you mention on your webpages. My guess is that these units were a modification of the TR1143 units - and were accordingly renumbered. The RAF seemed to like making minor modifications to an equipment, and then inventing a completely new number for the modified equipment - causing great confusion later on, when trying to work out what an item is/was! 73s Richard G7RVI To: Dongen, Nico van Cc: Frank Philipse Subject: RE: Obscure sets - and ideas? Date: Tue, 28 Mar 2000 11:09:22 +0100 good to hear from you! Well its good to know that even scrap sets like these aren't being chucked out - these may be the only examples still existing! Louis Meulstee is also of the opinion that they are something to do with the British equivalent of the SCR522 - namely the TR1143. I have looked up this set in A.P.1938 - unfortunately it does not show any pictures at all to confirm a visual sighting - but it does give circuits and valve line-ups. The valve line-ups agree to a reasonable extent with those that Frank gives with the pictures. What is odd is that TR1143 used Tx type 17, Amplifier type 18, and Rx type 19 - very different numbers to Tx type 50 and Rx type 71! Knowing that the RAF loved to modify their sets and give them a completely new number - much to the confusion of us collectors 50 years later! - my guess is that is what happened here. Richard G7RVI To: Frank Philipse, Richard Hankins Subject: Re: Obscure sets - and ideas? Date: Tue, 28 Mar 2000 19:11:05 +0200 All the info I could unearth so far was from AP2463 Vol 1 Sec 2 (October 1948) Receiving Unit type 71 is part of TR 1143A, covered in AP 2528A. However, Transmitter Unit type 50 is not in the AP, but there is transmitter type 70, also part of TR1143A and covered in AP 2528A. Are you sure that the type plate reads 50? Incidentally, I now found the IF is 10.72 MHz, only one source though. Regards, Louis Meulstee To: Louis Meulstee, ac6v, Richard Hankins, Ray Robinson, Richard Castle, Nico van Dongen, Andy Jackson Subject: TR1143 Date: Thu, 30 Mar 2000 01:05:23 +0200 Thank you all very much for your responses to my search for data about type50 and type 51 !!!!! (Sorry, normally I would answer your e-mail personally, but I have very little time at the moment.) I now already know a lot more about my old transmitter and receiver. On my homepage, I placed all your relevant e-mails so you can see what data has come up so far. I hope you don't mind having your e-mail there but it seemed an easy way. (Let me know if you do and I'll remove it.) http://home.wxs.nl/~frank.philipse/frank/type50.html I also discovered some url's containing some data about these units, which I will also place on the same page. There is one with a photo of the unit. (I have them not here, so I will do it tomorrow) There seems to be data about the units in A.P. documents. Could someone make a copy of the relevant parts and send it to me so I can place it on my homepage? If there is a circuit diagram and some supplemental data, I'm very much interested. Thanks again, Best regards, Frank To: Frank Philipse Subject: Re: TR1143 Date: Thu, 30 Mar 2000 11:33:57 +1000 (EST) I hade a look in my store room, and in Australia the English sets are not common. I have 4 and 3 halves of SCR522 and a few accessories but only 1 and a half TR1143 and no accessories. They look the same externally (slight difference in the covers) but completely different inside. Same external connectors. The SCR522 has a slightly larger frequency range. Havn't pulled it apart to see what modules are in it. It is a long way down the list for restoration. Ray vk2ilv |
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2000/03/30 Some links: military.htm Radio Research Paper - Ship's Radio Equipment 1943 Here is a Photo of the SCR522 USS Pampanito - SCR-522 VHF Radio |
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2000/04/02 Here is the circuit of the transmitter as I drew it: Type 50 circuit diagram |
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2000/12/09 At a swapmeet I met Jan van de Riet. He promised me to send some documentation about the TR1143! Also I baught another Type 71 unit. This time a more complete one but still a lot of changes were made. (see photo's) |
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2000/12/18 I received the ducumentation (in Dutch) about the TR1143 including the circuit diagrams from Jan van de Riet! Documentation (2,424,525 bytes) (nl) Type50 transmitter circuit (176,294 bytes) Type71 receiver circuit (193,714 bytes) |
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2003/06/30 From Victor Johnston I received this circuit diagram. He also wrote me: The TR1143 was a very robust transceiver. When a Mosquito crashed, I used to recover the radio equipment, and usually the TR1143 worked immediately I put it on the test bench. It was used in other aircraft as well, I worked and flew in Wellingtons, Martinets, Brigands, Buckmasters, and they all used the TR1143 before being re-equipped with the TR 1394.(?) |
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2005/01/02 See some nice pictures at Alain Malchair's website. His TR-1143 looks a lot better than mine. |
