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eico hf-81

  1. F

    My Eico HF-81 upgraded

    Hi everyone, greetings from Buenos Aires This is my heavily upgraded Eico HF-81. As you can see from the pictures it has Mundorf Silver Oil caps in the phono section, new RCA plugs, new wiring, Fischer & Tausche power supply caps, NOS Pyramid coupling caps, GE EL84, Telefunken 12ax7 and 12au7...
  2. A

    EICO HF-81 constant flutter noise through speakers

    Hey guys! I recently acquired a “fully serviced/restored” EICO HF-81 which I have connected to Heresy II’s speakers and I’m getting a constant flutter noise from both speakers and I’m not sure how to go about this. I’ll take any advice at this point before I have to take it to someone to repair...
    • Augie Pink
    • Thread
    • eico hf-81 flutter heresy ii integrated amp help
    • Replies: 16
    • Forum: Tube Audio
  3. E

    Bucking Transformer for an HF-81

    Hello, I am working on a bucking transformer for my HF-81. I got a CES 67-1124 (SS4-12C4A) a 12vct 4amp transformer from my local electronic store and it runs 24VA. Would this be enough to power my HF-81 in the long run? or should I get a higher wattage transformer?
    • Eafnb
    • Thread
    • bucking transformer eico hf-81
    • Replies: 6
    • Forum: Eico Place
  4. E

    Eico HF-81 Transformer Help

    So I just got my Heyboer PS transformer in the mail today, and as I started working on my Eico preparing to remove the stock transformer. My hand slipped and i ended up breaking a lead off a .03 MFD 600V molded capacitor. My question (as a beginner that I am) is, would the molded capacitor be...
    • Eafnb
    • Thread
    • eico hf-81 tube amp
    • Replies: 44
    • Forum: Tube Audio
  5. postman56

    Looking for Eico Knob, any help please

    I just picked up a Eico HF-81, and would appreciate if someone could direct me to where I may be able to purchase a replica, or original knob for my Eico HF81, see attached for missing knob. Also, any suggestions of service I should perform right off the hop when I receive it, It is working...
  6. CZ4A

    Improvments for the HF-81 phono preamp section

    I am in the process of recapping my Eico HF-81. I have read that the built-in phono preamp section leaves a lot to be desired. For now, I am just doing a 1-for-1 replacement of the electrolytics and resistors with film caps and Kiwame resistors. Besides component upgrades, what else has worked...
  7. ssouci

    Eico HF-81 -- best output tubes?

    I have a completely rebuilt Eico HF-81... virtually every part and wire has been replaced with careful choices by an experienced HF-81 rebuilder I've tried 3 sets of vintage NOS output tubes, with surprising results: #1. Siemens E84L / 7320 (heavy duty version of EL84 that can sub as a 7189)...
    • ssouci
    • Thread
    • 6bq5 tubes eico hf-81 el84 tubes output tubes tubes
    • Replies: 11
    • Forum: Eico Place
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