need help troubleshooting a MAX1771 based Nixie HV Switching PSU

Discussion in 'The Projects Forum' started by The_Bubbler, May 17, 2015.

  1. The_Bubbler

    Thread Starter New Member

    May 17, 2015
    4
    0
    all the info on the design can be found here: http://desmith.net/NMdS/Electronics/NixiePSU.html
    i didn't change anything from the original design except for a few minor components that where no longer available from digikey. the problem I'm having though, is there is no hv output... I've spent a few hours going over the board with my multi-meter checking that all the components are properly soldered to the board. i used the eagle files provided to order a PCB from OSH Park. any ideas as to how to troubleshoot this would be greatly appreciated!

    c4 was replaced with http://www.digikey.com/product-search/en?KeyWords=PCE3432CT-ND&WT.z_header=search_go

    c5 was replaced with http://www.digikey.com/product-search/en?KeyWords=399-3851-1-ND&WT.z_header=search_go

    l1 was replaced with http://www.digikey.com/product-search/en?KeyWords=513-1093-1-ND&WT.z_header=search_go
     
  2. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,967
    744
    was it working before you modified it,,,
     
  3. The_Bubbler

    Thread Starter New Member

    May 17, 2015
    4
    0
    i think you misunderstand, this is a very popular psu for driving nixie tubes, so i know the design works but the one i have built dose not and never has.
     
  4. The_Bubbler

    Thread Starter New Member

    May 17, 2015
    4
    0
    i could send whoever helps me a reward over Paypal probably somewhere in the range of $10 usd depending on how much the person helps...
    additional info: I'm supplying 12v dc to the circuit from an old PC power supply, capable of 16A on its 12v rail. also the parts that where replaced match all specifications of the originals including his specific notes
     
  5. The_Bubbler

    Thread Starter New Member

    May 17, 2015
    4
    0
    also shdn is connected to ground
     
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