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| POSTED: January 18 05:30:25, 2010 ( 00: AM PST ) |
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| milspec vs. comspec |
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| What is the difference between mil and com? Is Milspec better? in what way? How does a civilian get milspec tubes? ( if legal ) |
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| REPLIED: January 20 00:09:26, 2010 ( 00: AM PST ) |
#1 |
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| My eyes are dim, I cannot see, I have not brought my specs with me. |
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I always assumed Com Spec to be commercial specification which I took to be anything that fails mil-spec for any reason. That doesn‘t mean it‘s worse that Mil-spec - some Mil-spec tests aren‘t all that relevant to most users (eg, blemishes in the screen area ) so you can get a better price. Sometimes the only failure of a tube is that it was surplus.
You can buy mil-spec - All you‘re really defining is that the devices have passed the minimum levels as defined by the military for a particular contract and have paperwork to prove it.
Even if it doesn‘t, you may still be able to get the test sheet and see how the tube you‘re looking at performed.
The main difference is that you often pay more for milspec because of the paper trail.
Anyway, I might be wrong. I‘m just putting forward my assumption. I know exactly what milspec is, but I‘m only assuming comspec. Perhaps someone else knows more and can correct me if needed?
David |
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| REPLIED: January 20 04:55:54, 2010 ( 00: AM PST ) |
#2 |
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| Hmmm |
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| Sounds plausible. ITT said my F9815AG was comspec but it is in a milspec housing. (AN/PVS-14). not that that was strange. What was strange was that the specs match an OMNI IV but this thing is Autogated Pinnacle. Almost as if it was an OMNI V that didn‘t quite cut the mustard. Don‘t know for sure because he would‘nt give me exact specs on the thing...only published minimums. |
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| REPLIED: January 22 21:36:30, 2010 ( 00: AM PST ) |
#3 |
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| MilSpec / ComSpec |
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MilSpec tubes are those tubes that pass all DoD required tests of the image intensifier’s Module and built up image tube. Some of these tests are well known and used as a bases for grading a tube’s performance and image quality, such as: resolution, signal to noise, gain, Equivalent Background Input, maximum spots size allowed, and photocathode response. Other tests may be known and considered obscure, such as Modulation Transfer Function or not known at all such as the Humidity testing. A tube can be perfectly clean having no spots, with performance levels exceeding the state-of-the-art MilSpec tube, but if it fails the humidity test, it becomes a fallout tube because it didn’t meet the requirements set forth by CECOM. Most of us would buy such a tube and after finding out that it is a Humidity fallout, we would say” So what?” The major reason most tubes become fallout tubes instead of MilSpec tubes is because they are Humidity fallout tubes.
Your Commercial ITT F9815AG should have come with a tube or system data sheet which provides buyers of commercial tubes with the test results of the Module and/or the image intensifier. MilSpec tubes use the MX designation for there models, such as the MX-11769/UV, while commercial tubes from ITT are “F” numbers and L-3 are “M” numbers. MilSpec tubes do not have any testing documentation that accompanies them to the end user.
FYI – There are no MilSpec housing and/or optics, just different part numbers for ordering optical housing with or without the reference to government property embossed in it.
I hope this clears things up and that you find this information useful,
Ed |
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| REPLIED: January 24 02:39:05, 2010 ( 00: AM PST ) |
#4 |
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| Thanks Ed |
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| Yes all info is helpful to this newbee. I did call ITT and ask about the test specs for my tube and was told that even if he did have them, he couldnt give them to me. TOP SECRET I guess. Haha. He did say it was a very good tube to the point he almost sounded impressed. Hmmm I didnt get the tube new, but was able to talk to Aurora Tactical who originally purchased from ITT. He said they never get spec sheets and TT doesnt give them out anymore...The mystery deepens. |
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