Ilford Multigrade VC head - VOLTAGE STABILIZER

Discussion in 'Darkroom Equipment' started by davidrcarls, Jul 18, 2013.

  1. davidrcarls

    davidrcarls Member

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    I have an Ilfospeed Multigrade 500 Enlarger head made by Ilford. Page 16 of the manual states that "ILFORD Limited will be pleased to recommend a suitable voltage stabilizer upon request". Well, I called Ilford USA, and was informed that all Ilford B&W is now Harmon Technologies, and Harmon Technologies does not appear to allow for incoming inquiries. Does anyone know what I need for a voltage stabilizer? I contacted my local electronics guru, and it was his opinion that voltage stabilizers for enlargers need to be very carefully chosen. Thanks - dc
     
  2. L Gebhardt

    L Gebhardt Subscriber

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    I have never needed a voltage stabilizer with mine, but my power is very stable. So if you also have stable power I doubt you actually need a voltage stabilizer.

    I was also under the impression, possibly mistaken, that the controller had a small amount of voltage stabilization built in. So external stabilization was only needed for large fluctuations. I don't remember where I read this.

    How much does your voltage fluctuate?
     
  3. MattKing

    MattKing Subscriber

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    Last edited by a moderator: Jul 18, 2013
  4. L Gebhardt

    L Gebhardt Subscriber

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  5. ic-racer

    ic-racer Member

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    Different versions of the manual?
    The manual I have (Multigrade 500H Head) states this on page 17:
     
  6. George Nova Scotia

    George Nova Scotia Subscriber

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    ic-racer : different controllers, the older 500c did not have the VC switch, the CPM controller does.

    Sadly Harmon does not really support this equipment but the a kind enough to host some of the manuals on their web site.

    Unless you very unreliable power I don't think I'd worry about it. A large (expensive) auto transformer would do the job but I doubt it is needed.
     
  7. fotch

    fotch Member

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    I have several auto-transformers, they can adjust the voltage, I don't think they stabilize the voltage (providing a steady set voltage regardless of incoming variations. I doubt you will need to worry about this unless you have very short exposures. JMHO
     
  8. bsinmich

    bsinmich Member

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    I am not familiar with the Ilford but the Beseler and Omega have 82V bulbs and they don't last very long on 110V. Some of the Omega had one built in and sme had an extra module. I have both and also an autoformer that I inherited along the way that works great.
     
  9. ic-racer

    ic-racer Member

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    ??
     
  10. bsinmich

    bsinmich Member

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    I forgot to include the term voltage stabilizer or reducer in my previous statement. That is what gets my 110V to the 82V for the bulb.