20 Most Recent
Questions & Answers
Yukon spartan my pic is not clear light works but cannot get focu
Is it blurry? Focus the scope or clean the lenses.
Is it distorted? Don't know how to fix. Especially if the lens is cracked/scratched etc.
Is it dark/snowy? Put fresh batteries in.
Do you see black spots in the tube? Don't worry, certain amount of these are quite acceptable.
Anyway: It's a night vision for pete's sake. The picture won't ever be like the one on normal binoculars.
on Mar 07, 2012
Why in total darkness does the unit just flicker
these units need a very small amount of light to work at all, They amplify this small amount of light, with no light at all they have nothing to amplify! the infra red is a source of light so it can amplify that, At night they amplify street lighting or moonlight or starlight etc, hope this helps,
on Sep 19, 2011
Can not focus. The lens moves fine from one end to
Don't IR illuminator in the dark room. Turn on a small light in one of the
corner; such as, a small light bulb. increase ambient light a little at a time
until you can focus. You flooding the dark room with IR illumination which will
reflect everywhere in there. This might take care of the fuzziness in the
on Aug 20, 2011
Not switching on have replaced
Hello, take some switch cleaner--Radio Shack- and
spray just a small amount into the switch. Did you installed the battery
correctly with the polarity be correct. Does the battery compartment have any
type of corrosion?
If this does help then there is something else wron with it. stewbison
on Aug 15, 2011
Yukon 2.5 x50 nvrs tactical
Hello, don't worry about it. It is HV to the image intensifier tube. The battery
voltage goes through control circuit then to ccfl inverter (here is were dc
voltage is switch on and off and switch dc voltage is step up by toroid coil
that has two input and only two out puts). By impulsing the coil with two
different switch dc voltage on the input this make the current lag the two
different phase voltage by 90 degrees. Here is where the strange noise is coming
from. The toroid coil is encased in iron case and if half of this iron case is
loose, it makes case vibrate so the noise.
Now, the voltage come out of the toroid coil is switching dc (one could call
it AC because that what AC voltage is, it switch between positive to negative)
this voltage is about 300 to 900 switching DC voltage. This voltage will be
applied to a 1/2 wave voltage multiplier (this voltage multiplier with have
anywhere four four stages to 10 stages depend on what the input voltage to
Low the voltage out of the ccfl inverter the more stages the multiplier will
Now, the voltage multiplier will double the voltage per stage to need image
intensifier tube voltage of 12000 to 45000 volts---DC switching or AC what ever
one wants to call it. This voltage will bit you but it doesn't have a lot
current associated with it, the current would be in the 10 to 15 ua (micro-amps)
Now, you know. GB...stewbison
on Sep 24, 2011
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