Binoculars 4×30mm Night Vision Surveillance Scope

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Joker with Binoculars & Moon, plastic playing cards NEW

390144450970 0 Binoculars 4x30mm Night Vision Surveillance Scope US $2.42 (1 Bid)
End Date: Sunday Jan-24-2010 2:13:24 PST
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Binoculars 4x30mm Night Vision Surveillance Scope

270518864182 0 Binoculars 4x30mm Night Vision Surveillance Scope US $0.90 (0 Bid)
End Date: Sunday Jan-24-2010 2:17:22 PST
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SPORTING BINOCULARS 10 X 50 CAMPING Bird Watching
SPORTING BINOCULARS 10 X 50 CAMPING Bird Watching
Paypal   US $8.35
Red 4 x 28 Binoculars HuntingCampingBird Watching
Red 4 x 28 Binoculars HuntingCampingBird Watching
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Binoculars Alpen 625 8x28 Camping Hunting Bird Watching
Binoculars Alpen 625 8x28 Camping Hunting Bird Watching
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NEW AUDUBON HUNTING BIRD WATCHING ADJUSTABLE BINOCULARS
NEW AUDUBON HUNTING BIRD WATCHING ADJUSTABLE BINOCULARS
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Camo Spy Binoculars 30 x 50 Bird Watching Camping Hun
Camo Spy Binoculars 30 x 50 Bird Watching Camping Hun
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BINOCULARS 10x25 POWER GREAT FOR HUNTING BIRD WATCHING
BINOCULARS 10x25 POWER GREAT FOR HUNTING BIRD WATCHING
Paypal   US $11.99

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New 4x30mm Night Vision Surveillance Scope Binoculars

220534496206 0 Mystery Super Power 60x35 Coated Binocular Night Vision US $0.89 (0 Bid)
End Date: Tuesday Jan-05-2010 1:13:01 PST
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Mystery Super Power 60X35 Coated Binocular Night Vision

270510320756 0 Mystery Super Power 60x35 Coated Binocular Night Vision US $7.19 (0 Bid)
End Date: Tuesday Jan-05-2010 1:15:42 PST
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Camo Spy Binoculars 30 x 50 Bird Watching Camping Hun
Camo Spy Binoculars 30 x 50 Bird Watching Camping Hun
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OPSWISS 10x50 BINOCULARS BIRD WATCHING FOOTBALL
OPSWISS 10x50 BINOCULARS BIRD WATCHING FOOTBALL
Paypal   US $49.99
SPORTING BINOCULARS 10 X 50 CAMPING Bird Watching
SPORTING BINOCULARS 10 X 50 CAMPING Bird Watching
Paypal   US $8.35
Binoculars 10X25 Bird Watching Wildlife Brand New
Binoculars 10X25 Bird Watching Wildlife Brand New
Paypal   US $7.67
TASCO COMPACT BINOCULARS W POUCH STRAP BIRD WATCHING
TASCO COMPACT BINOCULARS W POUCH STRAP BIRD WATCHING
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Konus Event Binoculars 8x42 Hunting Bird Watching NEW
Konus Event Binoculars 8x42 Hunting Bird Watching NEW
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Why Do My Night Vision Binoculars Whine?

I bought a pair of 1st generation Seben binoculars and am curious as to what causes the whine when they are active. I understand the principle behind how they work, but what causes the whine?

 

logo Why Do My Night Vision Binoculars Whine?
SPORTING BINOCULARS 10 X 50 CAMPING Bird Watching
SPORTING BINOCULARS 10 X 50 CAMPING Bird Watching
Paypal   US $8.35
Red 4 x 28 Binoculars HuntingCampingBird Watching
Red 4 x 28 Binoculars HuntingCampingBird Watching
Paypal   US $1.10
Binoculars Alpen 625 8x28 Camping Hunting Bird Watching
Binoculars Alpen 625 8x28 Camping Hunting Bird Watching
Paypal   US $29.95

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