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Dino Direct carries them and has a pretty good description for them but is not complete. If they opearte in the manner I think they do, hold down on the lever to power them- do not pump, just press and hold. Since there is no mention of a battery or cell, this is the usual alternate method to power them.
Otherwise the online information that is most complete is http://www.dinodirect.com/sakura-scope-10-70x50mm-binoculars-night-vision.html
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
Not all the time, but if you release the button the image will fade to nothing in a minute or so. This is how it switches itself off. Don't expose it to light while it's powered up as this might damage it.
Most night vision when switched off will stay 'on' for a period of time. After a short time you should not see anything just black. You can't look through a night vision monocular that has been off for a while. The image you see is actually an image on a screen inside unlike a regular monocular or binoculars. Turning it on powers the screen. When turned off the screen is still warmed up and takes time to turn off. Like some old TV's. If you haven't used it for some time and pull it out for night viewing and can see a picture when you haven't pushed the on button. The unit is malfunctioning as it is staying on.
They do stay on for a while after switch, that is OK. Dim and out of focus may indicate that the output voltage is low. If replacing the battery does not fix it, then the problem may be in the power supply circuit.