Tavis Hord

Tavis Hord

Joined: 1/1/2023

  • RE: Repairing Tektronix 222 - shorted transformer

    Thu, 05 Jan 2023 18:03:26 GMT – Repairing Tektronix 222 - shorted transformer
    Thank you my plan is to wind a new one.
    I purchased a new Pot Core 18x11 + Bobbin (this one to be exact: https://www.ebay.com/itm/251637582555
    as well as some 25AWG magnet wire: https://www.amazon.com/gp/product/B09L62169L/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&th=1

    Do these look like they will work?

    I am assuming i just wind the primary and secondary in parallel. Do you know how many turns it has?

    Thanks again,

    -Tavis

  • Repairing Tektronix 222 - shorted transformer

    Sun, 01 Jan 2023 10:28:10 GMT – Repairing Tektronix 222 - shorted transformer
    Hello,

    I’ve got a vintage Tek 222 oscilloscope with a shorted transformer (T302) on the main board’s battery charging circuit and have found no way to source out a replacement.

    Wondering if anyone has an idea of how I can find one or an alternative solution.

    Part number for T302 is 120-1781-00 : Transformer Battery Charger 6 pin

    schematic and board layout attached. 

    Thanks for any info.