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Posted: 8/25/2016 7:40:02 PM EDT
This is a Litton M851 wit a 9644 date code. Could be Omni 3 or 4. Is there anyway to tell? Does anyone have an old data sheet from this time period for the Litton M851? 
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Posted: 8/26/2016 7:17:05 AM EDT
[#1]
This is a big help if you haven't seen it yet. Lots of info: http://www.ar15.com/forums/t_6_18/426658_How_to_tell_what_type_of_tube_you_have.html
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Posted: 8/26/2016 4:29:26 PM EDT
[#2]
M851 min specs per the sheet
64lp/mm SNR 21 Halo 1.25 Ebi 2.5 PCR 1800 |
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Posted: 8/26/2016 4:50:46 PM EDT
[#3]
Quote HistoryQuoted:
M851 min specs per the sheet 64lp/mm SNR 21 Halo 1.25 Ebi 2.5 PCR 1800 So back in 1996 that would have been a really high spec tube right? |
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Posted: 8/26/2016 5:36:10 PM EDT
[#4]
Quote HistoryQuoted:
So back in 1996 that would have been a really high spec tube right? Quote HistoryQuoted:
Quoted:
M851 min specs per the sheet 64lp/mm SNR 21 Halo 1.25 Ebi 2.5 PCR 1800 So back in 1996 that would have been a really high spec tube right? Just the 64LP alone would be great back then. Most I handled though were the 57LP types during the mid-90's. My first Gen 3 was in 1994/1995 and that was a NAIT NVPS-10 C-Mount system that I wish I still had. I used an old 105mm zoom C-Mount fujinon lens on that thing that rocked! P.S. I think you can still find those NVPS-10's....Sorry to go off topic, but a great little system back in the day. |
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Posted: 8/26/2016 6:22:13 PM EDT
[#5]
Quote HistoryQuoted:
M851 min specs per the sheet 64lp/mm SNR 21 Halo 1.25 Ebi 2.5 PCR 1800 Are you certain those specs are for a plain Jane M851. I have later sheets for the M851-1061 which is a later animal. Litton/ L3 didint seem to identify their tubes by model number and performance characteristics like ITT did. In other words a M851 could be Omni 1 2 or 3 depending on date of manufacture. This tube appears to be about 1300 PCR and 57 LP/MM (guesstimates) edit for typo |
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Posted: 8/26/2016 6:59:38 PM EDT
[#6]
Quote HistoryQuoted:
Are you certain those specs are for a plain Jane M851. I have later sheets for the M851-1061 which is a later animal. Litton/ L3 didint seem to identify their tubes by model number and performance characteristics like ITT did. In other words a M851 could be Omni 1 2 or 3 depending on date of manufacture. This tube appears to be about 1300 PCR and 57 SNR (guesstimates) Quote HistoryQuoted:
Quoted:
M851 min specs per the sheet 64lp/mm SNR 21 Halo 1.25 Ebi 2.5 PCR 1800 Are you certain those specs are for a plain Jane M851. I have later sheets for the M851-1061 which is a later animal. Litton/ L3 didint seem to identify their tubes by model number and performance characteristics like ITT did. In other words a M851 could be Omni 1 2 or 3 depending on date of manufacture. This tube appears to be about 1300 PCR and 57 SNR (guesstimates) I just double checked the sheet, and yeah it's the 1061 version. Oops... And 57 SNR would be an amazing spec, but I assume you mean LP/mm. |
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