Anybody knows this tuning indicator? |
| Mario Candelarezi Schem.: 0 Pict.: 31 01.Aug.07 17:44 Count of Thanks: 4 |
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Hard to find any info for Philips OM5 Attachments:
This article was edited 01.Aug.07 17:47 by Mario Candelarezi . |
Mike Izycky 
Schem.: 131 Pict.: 287 01.Aug.07 19:38 Count of Thanks: 4 |
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Hi Mario, Well, in England Cossor had a post-war range of International Octal-based valves of which the type numbers were preceded by the letters "OM-" such as the OM10 (=ECH35) and there were others too - if I recall correctly there was the OM6 (=EF39) and the OM4 (=EBC33). I have a model 464 from 1946 which uses these valves. Whether or not there was an OM5 "Magic Eye" I am not aware, but I think it would be worth checking on. As Cossor's radio interests were later taken over by Philips it might explain the labelling of a Philips valve with a Cossor type number. I will see if I can find more out. Regards, Mike. |
Hans-Thomas Schmidt 
Editor
D Articles: 532 Schem.: 7 Pict.: 4 01.Aug.07 21:19 Count of Thanks: 4 |
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Hi Mario, the OM5 tuning eye is listed in the polish Universal Vademecum, edited 1960. The maker is Philips: Two range eye. Base: see UM35 filament: 6,3V and 300 mA Light screen: 200V and 0,55 mA Resistances for the both control pins: 1MOhms each (connected on 200V) grid triode: 0...-5V for range 1, 0...-15V for range 2, angles are 90° each A similar tube, called PM5 with 12,6V and 0,15A filament was buildt. Best regards, Hans-Thomas Addition: There is also a OM5 from Cossor. It is a equivalent to EF36. This article was edited 01.Aug.07 21:23 by Hans-Thomas Schmidt . |
| Roy Johnson Schem.: 21 Pict.: 132 01.Aug.07 21:11 Count of Thanks: 5 |
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Mario, Mike, I have entered the tube and also the 12 volt version the PM5. The Cossor PM series are already entered in the Museum. Mario, please upload your photograph - it does not seem to have been widely used as we have no radios or equipment using it listed. Please tell us if you know the radio that had it. Thank you. Regards, Roy P.S. There are also OM5 and PM5 by Telefunken with apparently identical characteristics. This article was edited 01.Aug.07 21:56 by Roy Johnson . |
| Mario Candelarezi Schem.: 0 Pict.: 31 01.Aug.07 22:06 Count of Thanks: 4 |
Reply | You aren't logged in. (Guest) 5 Thanks Mike, Hans , Roy, very appreciated help. Hans thanks for very precise info. Roy I will uploading valve pic. This eye is from a Philips AL4331H made in Argentina. Radio info coming soon. Best Regards Mario |
Ernst Erb 
Officer
CH Articles: 5700 Schem.: 13756 Pict.: 31072 06.Sep.07 12:02 Count of Thanks: 4 |
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Dear Mario I see in your porfile that you have brought in some other models and that you show also a nice collection. Therefore I'm sure that you will upload also this ;-) Maybe you know even more models from Argentina? |
| Ernst Erb
Officer
CH Articles: 5700 Schem.: 13756 Pict.: 31072 06.Oct.07 07:55 Count of Thanks: 4 |
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Since there are two different types of tubes with designation OM5 - a pentode and this one - the photo is on OM5_MagicEye - and I just made a remark on OM5 in case somebody looks for the Magic Eye. This article was edited 06.Oct.07 08:33 by Ernst Erb . |
Jacob Roschy 
Moderator
D Articles: 1731 Schem.: 17 Pict.: 68 07.Oct.07 15:59 Count of Thanks: 6 |
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For more information about this odd OM5 and other mysterious P-, O- and U- tubes, look at here : " |
