Eico's owner group sticky

Discussion in 'Eico Place' started by drtool, Apr 14, 2015.

  1. RS Steve

    RS Steve Tube Junkie Subscriber

    Messages:
    7,279
    Location:
    Jupiter, Florida
    I was able to add a very nice original Eico 2080 to my collection, this time I waited until it actually arrived before posting about it. :confused: The last one I sent an offer on (and was accepted), the owner backed out and sold it for more to someone else.

    I haven't been able to find a schematic for it yet, or very many threads posted on AK about these. This unit was sold at an estate sale, where they sold every tube separate. :mad: I hate when they do that!

    So I have been acquiring tubes for it along the way, just lacking a few but have them on order. It looks like a very easy recap, but I plan on checking it for operation first.

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  2. Tinkerbelle

    Tinkerbelle Everything in Moderation Staff Member Super Mod Subscriber

    Messages:
    6,175
    Location:
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    Nice - if that's the 7591 PP integrated, the schematic is out there, I believe - I seem to remember coming across that when I had the 2536.
     
  3. RS Steve

    RS Steve Tube Junkie Subscriber

    Messages:
    7,279
    Location:
    Jupiter, Florida

    I was able to find a good schematic, just waiting for a pair of 6EU7 tubes to arrive so I can power this unit up and check it out. I imagine a wood cabinet will be next to impossible to find, I might have to put my wood working skills to use. This 2080 is in super nice condition, should turn out to be a nice addition to my tube equipment. :thumbsup:
     
  4. ferninando

    ferninando Lunatic Member

    Messages:
    12,456
    Location:
    San Jose Ca.
    RS, nice catch. super clean amp. Bet it sounds great.
    Enjoy.
     
  5. RS Steve

    RS Steve Tube Junkie Subscriber

    Messages:
    7,279
    Location:
    Jupiter, Florida

    I have never listened to anything Eico before, it should be exciting to get this 2080 going, and my HF-87 rat rod also. :beerchug:
     
  6. ferninando

    ferninando Lunatic Member

    Messages:
    12,456
    Location:
    San Jose Ca.
    I've got a HF85 pre I rebuilt with all new parts and did some improvements, and 2 HF12 mono integ. amps 6bq5 PP.
    A 3rd HF12 waiting for me to attack it.
     
  7. Raul

    Raul Active Member

    Messages:
    285
    Location:
    Italy
    My HF-81

    [​IMG]
     
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  8. RS Steve

    RS Steve Tube Junkie Subscriber

    Messages:
    7,279
    Location:
    Jupiter, Florida
    I have all the new tubes installed in my newly acquired 2080, but I have not been able to find a service manual, only a schematic. Anyone have access to the service manual? I'd like to read up on how they want the bias and balance done since I pretty much have all new tubes installed. I would imagine the balance is set at center and bias all the way turned down, most likely fully counter clockwise.

    Edit: Looks like the ST-70 manual will work for adjustments to the 2080.
     
    Last edited: Aug 25, 2016
  9. primosounds

    primosounds Single ended KT66/KT88 with 6SL7 or 6SN7 driver Subscriber

    Messages:
    1,818
    Right , the 2080 is essentially a ST70 with a different faceplate.
     
  10. RS Steve

    RS Steve Tube Junkie Subscriber

    Messages:
    7,279
    Location:
    Jupiter, Florida
    My first gradual power up of the 2080 resulted in the 40/20/500V can cap getting hot and stinking up the place. So it looks like I will recap this unit before going further with my check out. Looks like a very easy unit to recap, let the fun begin! :)
     
  11. primosounds

    primosounds Single ended KT66/KT88 with 6SL7 or 6SN7 driver Subscriber

    Messages:
    1,818
    You need to be aware that the bias voltage is critical to proper performance . So, you need to also verify that it is also properly functioning otherwise the power tubes will be running too hot.
     
  12. RS Steve

    RS Steve Tube Junkie Subscriber

    Messages:
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    Location:
    Jupiter, Florida

    I'm aware of that and have a service manual, but when a can cap starts burning at only 70V on the variac, it makes it a bit hard to check bias. I'll re stuff or replace the caps and try again.
     
  13. primosounds

    primosounds Single ended KT66/KT88 with 6SL7 or 6SN7 driver Subscriber

    Messages:
    1,818
    Actually, the bias voltage should come up immediately and show up as a negative voltage on the power tube input grid.
     
  14. GOYA

    GOYA Super Member

    Messages:
    1,009
    Location:
    Louisville, KY
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  15. ferninando

    ferninando Lunatic Member

    Messages:
    12,456
    Location:
    San Jose Ca.
    looks fantastic goya. good job.
     
  16. drtool

    drtool It might get loud In Houston Subscriber

    Messages:
    2,093
    Location:
    Houston Texas
    That machine is clean.:rockon:
     
  17. eduarsan1

    eduarsan1 Luis Eduardo Sanchez Subscriber

    Messages:
    503
    Location:
    Bogotá, Colombia
    Hello Akers

    I have the honor of be the owner of 2 beauties in NOS condition a ST-70 & ST-96, plus the MX-99 to multiplex the FM in the ST-96, all of the with the original tubes!!


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    Regards from Colombia

    Luis
     
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  18. drtool

    drtool It might get loud In Houston Subscriber

    Messages:
    2,093
    Location:
    Houston Texas
    ^ Very nice. Love to find a ST70 for my niece some day.
     
  19. eduarsan1

    eduarsan1 Luis Eduardo Sanchez Subscriber

    Messages:
    503
    Location:
    Bogotá, Colombia
    What did you said that? Problaby your prayers are starting to be answered! ; I have to go to Houston in a bussiness trip in 3 weeks and this time capsule is stored in a safe place in home.
     
  20. RS Steve

    RS Steve Tube Junkie Subscriber

    Messages:
    7,279
    Location:
    Jupiter, Florida

    All restored and working perfectly, very nice sounding amp!

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