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hf81

  1. lenos

    HF-81 (and general) grounding question

    I recently completed a ground up rebuild of an HF-81 using all new components except transformers, switches etc. It took a bit of debugging to get it all going but then I had a few moments where I could hear what this thing might be capable of before other issues popped up. One of the things...
    • lenos
    • Thread
    • ground hf-81 hf81 hum
    • Replies: 14
    • Forum: Eico Place
  2. Tubeglowpio

    Eico Hf-81 Outputs

    Hey everyone, hope everyone is staying cool this July. Just ordered an Eico Hf-81 and was wondering is anyones noticed that there seems to be two versions of the output transformers, anyone know if there is a quality difference? Also any idea of new pots to replace the old tone controls? Really...
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