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4" CRT B/W Video Door Phone Intercom System $29 DELIVERED

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4" CRT B/W Video Door Phone Intercom System $29 DELIVERED
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Store Rephas.clearance @ Has Baby on 10/03/2015 - 11:26 ebay.com.au (631 clicks)

4" CRT B/W Video Door Phone Intercom System Home Security Doorbell WIRED
All brand new comes in the box , clearance stock , Registered and signature required delivery included
DIY Easy Installation , includes 20m cable

VIDEO - DOOR PHONE
INTERCOM SYSTEM
MODEL : TK-860B + TK-808B

OUTDOOR UNIT

Camera
Infrared Light (Black / White )
Speaker
Bell Button
Microphone
Protection Lock
Terminals for Indoor Station

INDOOR UNIT
Contrast Adjustment
Brightness Adjustment
Speaker
Microphone
Screen (Black & White )
Power and Intercom Led
Monitor Button
Unlock Button
Intercom Button
Warning Button

INCLUDES
1X INDOOR UNIT
1X OUTDOOR UNIT
1X 20M CABLE
1X POWER ADAPTER
2X MOUNTING BRACKETS
1X SET OF SCREWS
1X SET OF KEYS (FOR OUTDOOR UNIT)
1X USER MANUAL

Home & Garden

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closed Comments

  • altomic on 10/03/2015 - 11:36

    ABN 18132962540

  • [Deactivated] on 10/03/2015 - 11:39
    +1

    reminds me of the 90's

  • Hypnotoad on 10/03/2015 - 11:41
    +2

    CRT? lol - “Welcome to the World of Tomorrow!”

  • IVI on 10/03/2015 - 15:00

    Surely NOT Cathode Ray Tube (valve)?!?

    • Russ on 11/03/2015 - 00:56
      +3

      Even better, it's one of the obscure types of CRT which is "backwards" compared to a normal CRT. Instead of the electron beam firing at the back of the phosphor and you viewing the image from the front of the phosphor, this tube has a side-mounted electron gun, and you are looking through the electron beam at the phosphor - on the side the electron beam hits!

      This was quite a clever invention at the time of projection TVs, because the phosphor could be deposited onto a metal plate, and achieve much better cooling than the phosphor on a conventional tube - so you could run it much brighter.

      However, because the back of the tube is a metal plate, there has to be a glass-metal seal, so the lifetime of the tube will probably be less than an all-glass conventional CRT, which has no such seal (the wires leading to the pins at the base of a conventional CRT do not require a seal, the metal alloy of the wires is carefully chosen so that it has the same thermal expansion rate as glass, and the glass adheres to it).

      Here's a similar type of TV tube, with side-mounted electron gun:
      http://en.wikipedia.org/wiki/TV80

  • [Deactivated] on 10/03/2015 - 17:08

    $29 baby monitor?

  • jonnois on 11/03/2015 - 01:00

    I thought it was a really chunky old game boy in the pic for a second :)

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