Variac vs isolation xfmr

Discussion in 'Radio Circuits, Repair & Performance' started by W8ISK, Sep 28, 2020.

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  1. W8ISK

    W8ISK Ham Member QRZ Page

    N8VIL, thank you, this is exactly what I need to do. Then, if results show continuity, I will buy an isolation Xfmr on-line. Thanks to all who responded. Ray. ( am working on my boatanchor power supplies! )
  2. VK2TIL

    VK2TIL Ham Member QRZ Page

    I am fortunate to have a Grundig RT-5A;


    It provides both variable voltage and isolation.
  3. WA9SVD

    WA9SVD Ham Member QRZ Page


    For some purposes, while it doesn't work for line voltages, a "high power" train (AC) transformer (like the old, heavy, bulky "Li*nel brand) can be used for several amperes , variable up to about 20 Volts. The markings are not all that accurate, but even an inexpensive DMM can be used to monitor the voltage. (The transformer I use is also quite "short circuit" :eek:tolerant; it HAS to be for use with toy trains!:( [Don't ask how I know...])

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