Question about US Night Vision Ultra PVS-7B Goggles

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I recently accuired a pair of an/pvs-7b night vision goggles. When trying them out they didnt work. I checked the batteries already in them, there was no old crusty battery acid. I replaced them and still nothing. I read on how to adjust the dioptre. still nothing. Whats the deal?

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Hello, there two things that can bad. One is the oscilator with voltage multiplier or the image intensifier tube. Send to Morrison Optics Co. GB....stewbison

Posted on Sep 24, 2011

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Posted on Jan 02, 2017

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Is VFR with night vision goggles at night dangerous for civilian pilots?


14 CFR 61.1 (b) (12) and (13) Definitions-Night vision goggles and operations. 14 CFR 61.31 (k) Additional training required for night vision goggle operations. 14 CFR 61.51 (k) Logging night vision goggle time. 14 CFR 61.57 (f) Night vision goggle operating experience. 14 CFR 61.57 (g) Night vision goggle proficiency check. 14 CFR 61.195 (k) Training for night vision goggle operations. 14 CFR 91.205 (h) Instrument and equipment requirements for night vision goggle operations.

Jan 04, 2017 | Aircrafts

1 Answer

I have an/pvs-7b night vision and need to replace my battery cap. The metal piece in side broke off???


Considering many vendors who sell parts are going to have a minimum order, Night Vision Depot for example has a 100 dollar minimum; you might consider trying to repair your old one or fabricating a new one. Otherwise checking on Ebay for one. On the other hand if you can fabricate a new one easily, you might consider being a vendor of that part too as you would not be the only person to encounter that dilema.

Jan 08, 2012 | ITT Night Quest 5001 Goggles

1 Answer

I HAVE NO CAM CODER OR DIGI CAM. BUT I WANT TO MAKE A NIGHT VISION CAM OR GOGGLES . PLEASE HELP ME OUT.


Lets get it right  here.  You don't have a camcorder or digital camera, right!  Then you want to make a night visison camera or goggles   I will tell what you need but you'll need  lots knowledge and know how pertain to electronic, hight voltage, optic lens, and some how getting parts that will be required.

1st. Image intensifier tube, 18mm or 25mm, Generation 1, 2, 2+,3,3+ iit.  You'll need to read up on thes image tubes.  Hint:   Their is electronical engineering in Sweden that built very thing that required for a NV devise....google it.

2nd. ccfl inverter with step transformer.  ccfl invert-cold cathode fluroscent Lamp, inverter electronic switch to turn off the DC voltage  (off/on @ 60hz/sec) or more.  Just with what I have said here.  I could write 200 page on it, and this isn't all of it.

3rd. Need small toloid (sp) coil, or transformer that will step up the Vcc voltage (battery volts) to something in hundreds/thousand volts.

4th. Toloid coil/transformer  take ccfl inverter voltage and multiply it to the operating voltage, frequency, and current the iit (image intensifier tube needs)  Example; 3 battery volt ----ccfl inverter

(where voltage switched off/on (about 3.8 dc volts here with capacitor switch)----- two primary winding (this switch the phase of the two dc voltage, it also has the dc current lage behing the dc voltage by 90 degrees)   Now the primary induces voltage into the secondary windings which is a step winding to about 500V to 1700V  THEN

Voltage multiplier (uses cremiac capacitory HV caps, then diodes (HV)  and they are hook up in a way that look like rome tower-cross hatch pattern---here, there are many different ways to get voltage multiplier, 1/2 wave, full wave,etc.  Now ever two capacitors and three diodes are consider one stage or cascade.  Each stage will double the previous voltage.   Example:  starting with 2000DCV switching to first stage 4000DCV to second stage 8000DCV to third stage 16000DCV to fourth stage equalls 32000DCV.

 

In this world under conservation of engery; nothing is destroyed or greaded, just engery transfer from one state to another.  Example:  If one could look down the wire from the image tube plate to the end of the battery---one would see resistance/  In the EEEE world it called impendence.  This impendence is made up of wire,capactance, resistances, component resistance everything will contribute to the overall impendence.  Remember the current lag the voltage by 90  degrees.  Simply this lag plays little joke on the impedence--for a short moment in time it makes it look like no current source and before it can reconized it, it off, the process starts all over.  simplist as I can get.

 

 

Jul 18, 2011 | US Night Vision Ultra PVS-7B Goggles

1 Answer

Unit simply does nothing when its turned on. the IR assist still works. (AN/PVS-7B/D


Letto, This PVS-7B has a generation II image intensifier tube in it. The image tube is manufactured by ITT liton company. The only way to fix this wonderful NV devise is to send to ITT Night Vision Company. They are listed in the internet. Unless you can find someone to work on it, but the really need to know what they are doing. stewbison

Mar 01, 2011 | US Night Vision Ultra PVS-7B Goggles

1 Answer

My pvs7 wont stay on thay shut of after 30 seconds and then start to shut of ever few seconds


Hello, have you or someone else pointed this night vision devise at bright lights, street lights, head lights. If so, maybe the damage has/hasn't alread been done. STOP. This PVS-7 goggles with ITT image tube with generation 2 or 2+ or possibly generation 3 tube. The devise is an American made unit, and the best in the world. Nobody can compete with the USA on NV. They sat the standards on Night Vision.

Have you replace the 6 volt battery? Get the goggle in a darken room then turn the switch on.
see if the 25mm plate will turn green and stay on. But first replace that battery.
Therefore, if this test works, then never and I mean never shine NV devises into bright lights, it will destroy them every time.

PS. send me another message and let see what happen. stewbison

Feb 26, 2011 | US Night Vision Ultra PVS-7B Goggles

1 Answer

I am having trouble with my pvs 7 night vision. I can see clearly for about 60 yards. The IR illuminator is not working. What do I need to do?


OK, is the IR luminator working with a red glow. Don't look at it. Some these IR luminator have a adjustable lens that one can screw out or screw it in. If the IR isn't igniting then the LED could be bad , broken wire, or bad switch. stewbison

Feb 09, 2011 | Night Optics USA AN-PVS-7-3A Goggles

1 Answer

Looking to buy a used pair of pvs 7 nightvision goggles and owner says there are a couple of small black spots when you view is this a cause for concern and what else should i look for ?


Hello, that is normally to have some black spots. Now, if tries to tell that this Military spec. He wrong. Two black spot on any image tubes used by the US Military is rejected, they only allow one black spot and that if everything else is OK. How fuzzy is around the outer circle of the image tube. If there is a uniformed green pattern through out the scope. I would say it was OK. But remember "Buy be Aware". GB...stewbison

Dec 30, 2010 | US Night Vision Ultra PVS-7B Goggles

2 Answers

Put it together myself now wont focus past 5 ft and has double vision i tryed using the adjustment knobs and stillno luck


loosen the the thingy behind the lens adjustment, you can turn it clockwise or anti-clockwise which it will go down or up, thats it..problem solve for your 5ft focus problem..in the double vision, you gotta line up the eyepiece center to your both eyes..problem solve again

Apr 29, 2009 | Optics

1 Answer

Powering down


How long have you had the system? Did you purchase from USNV or private party? If from USNV why not call them up and send it in for repair. If from private party,,,,,that's the chance you take. Sounds like you have either a failing power supply or an electrical short somewhere. In any event the system should be looked at by somebody who knows about night vision. If purchased within the past 2 years it will still be under warranty.

Nov 27, 2006 | US Night Vision Ultra PVS-7B Goggles

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