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What the best Intercom these days?

Discussion in 'Electronic Design' started by Joerg, Jul 1, 2013.

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  1. Joerg

    Joerg Guest

    Hi,

    Looked up and down, slim pickens. Most are powerline based which
    according to reviews means serious range issues, static, reliability
    problems. Newer ones need three-prong outlets which is often not
    possible where you have these little two-wire extensions (what were they
    thinking?). The Chamberlain NLS2 is 900MHz based which is very good, but
    according to reviews needs batteries or a really clunky wall wart, and
    quality was occasionally reported as not too great despite the high price.

    http://www.chamberlain.com/ccv2/pages/productmodeldetail.aspx?modelId=7808

    (street price is around $100)

    What's needed is simple: A box with a "Talk" button and a volume control
    potmeter. Ideally for 115V two-prong plug-in but where the communication
    happens on 900MHz or some other RF band that is as low in frequency as
    possible. Any experience?
     
  2. Robert Macy

    Robert Macy Guest

    Why are you shying away from the AC wiring link? They use FM centered around 200kHz and you can probably get as much distance as you need. Yes, occasional noise [are you going to talk THAT long?] but unless you go to BlueTooth in the 5+GHz band, you'll still have problems.

    These things are CHEAP! multi-drop, push to talk sometimes station to station, sometimes PA to everyone, seems ideal. I have't seen full-duplex on anyintercom, except for a true telephone. then haven't looked either.
     
  3. Charlie E.

    Charlie E. Guest

    We had always used the intercomm feature on our wireless phones, until
    my handset died and we haven't gotten around to replacing it yet. What
    I really need is a two line wireless phone system, but haven't found
    one yet in our price range...

    Charlie
     
  4. Joerg

    Joerg Guest


    Right now for us, but I'd like to know for elderly folks as well.


    That's what we use right now but they slurp up a NiMH charge in less
    than a day. Plus they lose their channel setting every time I remove the
    batteries for a recharge.

    My wife just brought me a nice big iced tea, just out of the blue. That
    was nice. She makes it in a big glass pot in the sun. Solar iced tea :)
     
  5. Joerg

    Joerg Guest

    IME all that PLC is flakey. All it takes is one power supply setting off
    a fat harmonic right there and it's all hosed. BT.


    But which ones are good?
     
  6. Joerg

    Joerg Guest

    We have very similar ones. But Panasonics screwed up the design. Instead
    of just pressing a button like on our old Panasconic phones now you have
    to enter some "station code" and fumble through some menues. Stupid
    decision, classic ivory tower case of not thinking through a design and
    not trying it in the field.
     
  7. Charlie E.

    Charlie E. Guest

    Not bad, but I would need about four handsets, making this about twice
    any stretch of a budget I can conceive... :-(

    Charlie
     
  8. Joerg

    Joerg Guest

    A telephone at the dunny? Who are you calling from there?

    Make sure the flatulence noise compensator is turned on ...
     
  9. Fred Abse

    Fred Abse Guest

    UR Leslie Nielsen?
     
  10. Guest

    12 volt sealed lead-acid talk battery. Charge it once a month whether
    it needs it or not.
    A circuit that lives next to the talk battery and generates about
    50 V 20 Hz from 12 V.
    Western Electric 500/1500/2500 sets from the thrift store.
    Extra pushbutton per set to trigger the ring generator circuit.
    Lots of Category 3 cable. :)

    Matt Roberds
     
  11. Jasen Betts

    Jasen Betts Guest

    subject:

    how about a multi-handset DECT with intercom function?
     
  12. Joerg

    Joerg Guest

    That would definitely not have enough WAF :)
     
  13. Joerg

    Joerg Guest

    They have generally screwed up the intercom functionality, big time.

    Old models, designed by older engineers who knew: Push button, talk.

    Newer models, design by folks who obviously had no clue about it: Enter
    intercom menu, press star or whatever, enter number of handset you want
    to call (as if anyone knows that) ... -> useless.
     
  14. josephkk

    josephkk Guest

    Smartphone punks. They think everyone knows how to do everything with a
    smartphone.

    ?-(
     
  15. Joerg

    Joerg Guest

    And we ain't got no smart phones.
     
  16. Charlie E.

    Charlie E. Guest

    Hard to live without a credit card of some sort. Maybe get one of
    those rechargable gift certificate thingies...

    For recent movies, I usually use Redbox at the grocery store.
     
  17. Dombo

    Dombo Guest

    Op 01-Jul-13 22:27, Joerg schreef:
    Midwife when it's a big one.
     
  18. Fred Abse

    Fred Abse Guest

    A large number of heart attacks, strokes, etc. occur whilst in the can.
     
  19. Charlie E.

    Charlie E. Guest

    Many moons ago, I was asked to 'house sit' a house, well, actually a
    small mansion, that a developer had built and then gone bankrupt. Some
    of the 'neighbors' had been stripping it of anything of any value, so
    the bank was hiring students to live out there and provide a little
    security.

    The bathroom had tile floors, walls and ceilings and a hose bib so
    yes, you COULD just hose it down. It also had heating pipes in the
    floor so that it would be warm and toasty for your footsies in the
    winter.

    It was just too far out of town for me to do the job, though, as I
    didn't have a car at the time.
     
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