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Conference proxy::pdp_11

Title: The PDP11 conference
Notice:This is an MDNF -- Management Disinterest Notes File
Moderator:ATLANT::SCHMIDT
Created:Thu Sep 11 1986
Last Modified:Fri May 30 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:1162
Total number of notes:4942

1154.0. "Converting a 48vdc to 120v ac supply ?" by KYOSS1::LUIZZA () Tue Mar 11 1997 16:15

    
    I have a question reguarding a PDP 1173 system which is in a BA23
    enclousure. The customer is a Phone company and has the main power
    supply that is an obselete item. A H7877 +48v input supply. If I
    convert the supply over to a H7864-b +120v ac supply the outputs should
    all be the same for the dc stuff right? The fan's and such are also off
    the dc supply voltage so it should not need anything else to make it
    work right?  
    
    Just checking before flame on with the other supply. 
    
    /Irv
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1154.1H7877 replaced with H7864-b Works.KYOSS1::LUIZZAWed Mar 12 1997 14:5911
    
    Just in case someone else ever runs into the same situation with this odd
    ball 48v dc power supply you can convert it to the 120v ac input. Did
    it this morning and it seems ok.
    
    The h7877 supply had not been available since 1990 and must be made of
    gold as the price (if we coulld have gotten it was $4.000+. 
    
    Just in case there are any people still working on PDP's.
    
    /Irv