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  1. #1
    4-400's Avatar
    4-400 is offline superlaxative shitmixer DX Numbers: KZ01 Home Channel: 144.200 usb
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    Default zero center meter question

    ok working on a project and have hit a brick wall
    project requires two center zero meters ..however these are few and hard to find let along finding matching ones tat are not the size of a school bus

    so i want to make it more modern by using led bar graph or similar however have no idea how to implement that as a zero center meter .

    requirements ..to read voltage +/- at the millivolt level
    must null to zero volts


    steer me towards nirvana ..last time i saw a zero center meter was in science class like 1985

    this is for a TDOA .which is here https://verbed.home.xs4all.nl/hamspa...TDOA/tdoa5.htm


    yeah yeah i know some places still sell them but man they are either junk Chinese and questionable quality or 6 weeks away if they arrive and you Americans charge tons of dam gold for shipping to a second world country that supplies you with lanolin cheaply
    Quote Originally Posted by -=PEAKABOO=- View Post
    I detect shenanigans somewhere in this thread and my eyes hurt.

  2. #2
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    Castoff junk from mic to antenna.
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    Default

    Are you planning a night bombing on Coventry?

  3. Thanks nexus73 thanked for this post
  4. #3
    639AZ's Avatar
    639AZ is offline Skilled Mauldropper Home Channel: 7.83Hz
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    Default

    I’m sure I can help you find some old American ones that won’t break the bank.

  5. #4
    4-400's Avatar
    4-400 is offline superlaxative shitmixer DX Numbers: KZ01 Home Channel: 144.200 usb
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    Quote Originally Posted by HiDef View Post
    Are you planning a night bombing on Coventry?
    ehh no have always had a interest in rdf

    639 thanks for offer ,but will go leds as lighter less likely to break throwing it in the back of the shaggin wagon ..easier to repeat for others..visually easier to see at night

    - - - Updated - - -

    found a led center zero meter on alibaba a bit expensive but do able if i cant make my own i guess
    Quote Originally Posted by -=PEAKABOO=- View Post
    I detect shenanigans somewhere in this thread and my eyes hurt.

  6. #5
    4-400's Avatar
    4-400 is offline superlaxative shitmixer DX Numbers: KZ01 Home Channel: 144.200 usb
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    Default

    wow that was ..ehh easy and strange thing is i was thinking along same lines and even stranger the main diagram for the tdoa is very similar to the tdoa5 in the above link..even better!

    http://home.earthlink.net/%7ew9xl/schematic.jpg
    Last edited by 4-400; 08-04-2018 at 06:11 PM.
    Quote Originally Posted by -=PEAKABOO=- View Post
    I detect shenanigans somewhere in this thread and my eyes hurt.

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