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Quest ITT Night PVS-14 Gen 3 Night Vision Scope w/ FREE UPS Questions & Answers
Power supply circuit boards,gives only
OK, what is the input voltage? I will give you a ruff diagram here. (volt in)
Vcc--sw's-on/off/IR-control board (microprocessor)---ccfl (cold cathode
fluorescent lamp) inverter (changes DC voltage tow switching DC (such as
on/off/on/off/on/off but at a much faster pace (20Khz)---toroidal coil (this
coil will step the switch DC voltage up to about 1000 to 1500 switch DC volt,
then this coil will change the orientation of the voltage to current
relationship by shifting the current by 90 degree's where it lag the
voltage---this process has some changes on circuit and how it works)----OK, from
the ccfl inverter------voltage multiplier (all this some HV capacitors and HV
diodes hook up an configuration where each stage will double the voltage that go
into... EXAMPLE: 4 stage voltage multiplier for each stage now it double the
voltage 1500V input to 1st stage--output to 2nd stage 3000V output to 3rd stage
6000V out put to 4th stage 12000V switching DC, they will also refer to this
voltage AC voltage because AC switch to from - negative voltage to + positive
voltage.
Like in you case, the two volts from the controller to ccfl. Out put volt
from ccfl with be around 2.4 to 2.6 due capacitance discharge, Now this voltage
will be divided in the ccfl by two input windings (I am not going to explain
this). Now the two input winding will induce voltage to the secondary winding
(step up). The output from secondary of toroidal coil will be multi switching to
the voltage multiplier. Probably in the neighborhood of 1500 switching volt. How
many stages the voltage multiplier has I don't know. The ignitier voltage to the cathode from the
multiplier would be around 12000 voltage to get image intensifier tube to fire.
stewbison
I have an NEPVS-14 that was left on while facing
this is not much to go on???? i gess you have found out its not working by now,,,try changing the batterys? these scopes only have a life span of about1500 hours after that there dead they are "bright light protected" so leaving it switch on in daylight should have just knocked the batterys out,,,
Cross hairs do not adjust. Tell me what to do please?
All question need FULL 'make model (what it is)'.
You posted to optics, so let's guess is a telescopic rifle sight?
It is impossible to see and movement as the crosshairs move such a tiny amount. Half a millimetre in the sight is 10 feet at the target. The only way to zero in sights is on a fixed bench rest at the range.
If you really think they are faulty, return them to the maker for repair.
3/8/2023 1:07:51 AM •
Optics
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Answered
on Mar 08, 2023
I have a NexStar 90GT with no hand control, a replacement will cost $135, is it worth it to buy for this telescope?
Whether or not it's worth it to buy a replacement hand control for your NexStar 90GT telescope depends on a few factors:
- How often do you use the telescope? If you use it frequently and rely on the hand control to find objects in the sky, then it may be worth it to invest in a replacement.
- How important is the hand control to your observing experience? If you're comfortable manually finding objects in the sky and don't necessarily need the hand control, then it may not be worth the expense.
- Can you find a cheaper alternative to the official replacement? Sometimes, third-party sellers may offer hand controls that are compatible with your telescope at a lower price.
Ultimately, it's up to you to decide whether the cost of the replacement hand control is worth it based on your individual needs and preferences.
2/25/2023 7:57:32 PM •
Optics
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Answered
on Feb 25, 2023
No zoom function on a kalimar power zoom scope,
larry389's so-called solution is not a solution... just an opinion to which each individual is entitled... even when not correct! I've used a Zeika Opt. Co. Power Zoom Binocular No.25361 for over 25 years since inheriting them from my father who purchased them in early 1970. To say the least, treated carefully and with respect for the delicate instrument that they are, they've been wonderful and still work perfectly fine. Perhaps Larry's experience is based upon handling them like junk and, therefore, reaping what he has sewn.
2/6/2023 8:12:30 AM •
Optics
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Answered
on Feb 06, 2023
I have a Whirlpool clean top stove with a cracked stove top. Can I get a replacement top & is it easy to install or do I need a professional to install it?
Yes, you can get a replacement stove top for your Whirlpool clean top stove, and it depends on the model and the availability of parts. You may contact Whirlpool customer service or check with a local appliance parts supplier to see if they have the replacement stove top in stock.
As for the installation, it will depend on your level of experience and comfort working with appliances, as well as the specific model of your stove. Some stove tops may be relatively easy to install, while others may be more complex and require professional installation.
Generally speaking, installing a replacement stove top can be a difficult and complex task that requires a certain level of technical knowledge and expertise. It's recommended to consult the stove's user manual or contact Whirlpool customer service for assistance with installation instructions or to find a professional to do the installation.
1/24/2023 8:29:55 AM •
Optics
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Answered
on Jan 24, 2023
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