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Hits: 3915 Replies: 8
L63 (L63) USA?
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Roy Johnson
03.Jan.07 |
1
Dear Collectors I see that we have two entries for the L63. L63 designated as a Common tube USA and a L63_MOV. All the pictures on the "USA" L63 are actually of MOV valves. Was the L63 manufactured by anyone other than M.O. Valve/GEC? I have no evidence! Kind regards to all, Roy |
Ernst Erb
03.Jan.07 |
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Dear Roy Thank you very much for your remarks regarding the two entries. |
Roy Johnson
03.Jan.07 |
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Dear Ernst, Thank you very much for your advice. I did not want to take any action by deleting and moving without seeking confirmation, even when one is fairly sure! As with the LV90, there is so much still waiting to be discovered. Kind regards, Roy |
Mark Hippenstiel
04.Jan.07 |
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Dear Roy, dear Ernst, I have one "Osram (BVA)" of the ST envelope type and one M.W.T. with the T9 tubular envelope in my posession. While I concord to count Osram to MOV, I'd like to point out that we have MWT as a seperate maker (look here). Maybe the MOV-only theory should be re-thought? Regards, |
Ernst Erb
04.Jan.07 |
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Dear Mark I'm not familiar enough - without research in my books - to decide if it is a mistake to carry also Marconi (M.W.T.) as valve producer/brand but I think it is so. We list 14 valves for Marconi: DA42 DW7 DW4011 KH1_Marconi LV6_Marconi N41_Marconi N43 N147 T X42_Marconi 50B 201_Marconi 202_Marconi 204_Marconi And the many underline types show that there is something wrong ... If I'm right it is the same group in different times and company decisions. I'm sure Roy knows much more and will suggest to us what to do. In any case it is essential to know the Osram-story for knowing. I have written about it but not the time to reread it. It is about the same like in Germany where the tubes are stamped Telefunken but built by Osram during many years. The two Osram did not anymore belong together after the founder has sold them - that I can still remember. |
Roy Johnson
04.Jan.07 |
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Dear Ernst, Mark, The majority of the manufacturers that we list as having made a valve are probably wrong! As Ernst remarks it is not only MOV or UK - it is business. Approximately:- <1918 Marconi Wireless Telegraph valves were made by Edison Swan. These were badged Marconi. 1918 Marconi Wireless Telegraph combined with General Electric (The UK one not the USA) to form Marconi-Osram Valves. GE had made valves but MWT had not. 1920 Marconi-Osram renamed M.O Valve Co. I am fairly sure that MWT never manufactured valves only early radios and later electronics. Post 1960 or so we have GEC Electronic Tube Company as the Management Co for English Electric Valve Company and the M-O Valve Company. SO What we list as manufacturer depends largely on date and this is very difficult. I tend to list as manufacturer the earliest that I know from the literature. ( I have changed some from Mazda to Ediswan on that basis). BUT - when the same type/named valve was made for a large number of years it could be listed under several manufacturers - GE, EE, M-OV with the SAME badge. I do not think that would help! (We should add English Electric, however - I shall ask as I have "parked" a few valves under GEC) All we can do is to try our best and gradually fill in the details. The dates are the most difficult to obtain as one never knows if one has the FIRST data book. I shall try and research more but those are my immediate quick thoughts. Kind regards, Roy
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Ernst Erb
04.Jan.07 |
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Dear Roy The rule should be that we get only ONE company/brand fort a group. Tubes after WW2 (e.g. GEC Electronic Tube Company) can go into a different scheme. |
Roy Johnson
04.Jan.07 |
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Dear Ernst, Thank you for that. I shall need to think through the implications in detail and come up with a plan. Rome is not yet even planned! MWT is not listed (correctly) as a valve manufacturer. I have applied to add 3 more names. English Electric Valve, Marconi Applied Technology and e2v which is a current manufacturer. These are the successors to EEV. Only "Valve" box ticked. I believe that we should acknowledge the existence of such manufacturers - how we allocate brands and details to the valves needs to be thought in detail. MOV and EEV were two separate orgnisations on different sites - GEC were managers, so calling all such valves GEC is perhaps not fair! Perhaps we just call England and Germany (and Switzerland?) EUROPE! I shall try and find a little time to come up with a plan. It must be simple enough to operate and provide sufficient detail for both archival and practical use. Kind regards, Roy |
Ernst Erb
04.Jan.07 |
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Konrad just told me why the valve was there: The "Codex", a very small booklet whith lists over 10'000 valves (and is full of errors) shows two valves L63 with different electrical parameters. This may be wrong. The only error was that "the right one" was called L63_MOV. Now "the American" will have to be the code-9-tube. Konrad will bring it in (again). Since "Codex" is very often used by beginners and has been reprinted, we have to list all the valves there. What are the reasons why we have to list all - even if they do not exist? 1) Since a few persons act as valve administrator it is quite possible that a member tells one of them that the valve is missing here - and then we load it up. Then comes another - like me with the L63_USA and deletes it again ... The game can go on for ever ... 2) We want to be a real virtual "reference book", not only a catalogue. If something has been printed in a common book or journal then we have to give reference. In our case of the L63_USA (better even L63_USA?) we have to state in colour maroon (even in bigger size) why this particular tube is not existing (or probably not) but where listed - just everything we know. If we are (prety) sure we change the valve into code-9 - AFTER we have written our comment. Rome Dear Roy, I'm glad taht you think first of a plan for that. But I would distinguish between the continent and GB - even suggest Commonwealth. We still can use Europe if this is the case, it is there. Our biggest problem is indeed to combine the "reference book" with the "practical side" for the user who does not read about valves - but "only" uses them. I see that you have already entered the new brands/manufacturers. We will probably not (yet) have to deal with E2v - but it is good to list the company (of 2002) since we want to be a "reference book". Thank you. |
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