Harman Kardon Tube PreAmp

Discussion in 'Tube Audio' started by MCD275, Sep 28, 2017.

  1. MCD275

    MCD275 Member

    Messages:
    57
    Location:
    South-West Germany
    Hi everybody,

    Maybe you can help me. Does anybody knows this Harman Kardon PreAmp? I purchased it some years ago in Berlin/Germany but Harman Germany cannot tell me anything regarding this amp.

    K800_20170105_134037.JPG

    Harman Kardon Mark IV Tube PreAmp Serial No. 001
    Harman Kardon Mark IV Power Supply Serial No. 002
    Ac 240 V / 480 VA


    K800_20170105_134244.JPG

    Any ideas?
     
    Lavane likes this.
  2. BillWojo

    BillWojo AK Subscriber Subscriber

    Messages:
    2,183
    Location:
    Burlington, NJ
    Never saw one like it. Mark IV brings up the much older preamp. I really like the layout and construction, well shielded. Whats in the bottom unit, a power amp?
    I wonder if this never really went into production or if it was a relabeled product. Tell us more how you acquired it.
    It's definitely a top notch product, how does it sound?
    Looking closely I wonder if the volume control was replaced, tie wraps look out of place in there.

    BillWojo
     
  3. sheltie dave

    sheltie dave Addicted Member

    Messages:
    6,930
    Location:
    St. Louis
    It is not the VAS reproduction. At 240 volts, it is European based, I suspect.

    Yep, it was a German skunkworks project from Harlan. Worth getting.
     
    trainbuftony likes this.
  4. MCD275

    MCD275 Member

    Messages:
    57
    Location:
    South-West Germany
    @BillWojo

    Bottom Unit is the Power Supply.
    Got it via a HiFi shop in Berlin.
    Cannot remember the Setup in detail anymore but Sound was ok. Have not tried it yet with my current gear.
    Volume Control was like this already at the time I bought it.
     
  5. MCD275

    MCD275 Member

    Messages:
    57
    Location:
    South-West Germany
    @sheltie dave

    By 240 V I had the same idea but Germany at this time had 220 V. Maybe English?
    What means "it was a German skunkworks project from Harlan"? Please explain, if possible. :)
     
  6. BillWojo

    BillWojo AK Subscriber Subscriber

    Messages:
    2,183
    Location:
    Burlington, NJ
    Wow, there is a power supply in the bottom unit? I thought the transformer looked small but it sure has a lot of big caps. Can you show a picture of the backs of both units and a picture of the inside of the power supply?
    It sure looks interesting, what kind of tubes are in there?

    BillWojo
     
  7. daveg3588

    daveg3588 Toy addict Subscriber

    Messages:
    990
    Location:
    Hamburg, NY
    Maybe HarmanKardon can help us with this, as he is" aus deutsch"
     
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  8. eiraved

    eiraved AK Subscriber Subscriber

    Messages:
    1,186
    Location:
    Antelope Valley, CA
    "Skunkworks" is a special project unit of Lockheed Martin which developed advanced, top secret aircraft. I don't know who "Harlan" is...
    Help us please!
     
  9. MCD275

    MCD275 Member

    Messages:
    57
    Location:
    South-West Germany
    Thank you to all of you for the great Response. Attache please find more photos of this PreAmp.

    @BillWojo

    K800_20170105_133658.JPG

    K800_20170105_133958.JPG

    No Picture from inside of the Power Supply for the Moment. Sorry but maybe later.

    K800_20170105_134257.JPG

    JAN Philips 12AX7WA
     
    Leland47 and Westy56 like this.
  10. eiraved

    eiraved AK Subscriber Subscriber

    Messages:
    1,186
    Location:
    Antelope Valley, CA
    It is one beautiful preamp, I hope others will chime in soon as I really am curious about it.
     
    jdsalinger likes this.
  11. Lavane

    Lavane AK Subscriber Subscriber

    Messages:
    5,615
    Location:
    northern cal.
    Same here. Very nice layout.
     
  12. gadget73

    gadget73 junk junkie Subscriber

    Messages:
    32,922
    Location:
    Southern NJ
    Know nothing about it, but it certainly looks well made. Any time you have a serial number "001" and "002" its an interesting piece. Makes me wonder if there was ever an "003" or beyond. You may have the only one.
     
    eiraved and Lavane like this.
  13. Pio1980

    Pio1980 AK Member Subscriber

    Messages:
    22,085
    Location:
    Angel Station, Alabama
    Prototype project?
     
  14. toxcrusadr

    toxcrusadr AK Subscriber Subscriber

    Messages:
    29,065
    Location:
    Central Missouri
    Anxiously awaiting more from Sheltie Dave on this.

    'Skunkworks' in this context = (secret) research facility.

    Was 'Harlan' a typo and you really meant 'Harman'?

    So, a prototype from a Harman shop in Germany?

    It looks totally cool and I want one.
     
    HarmanKardon and eiraved like this.
  15. HarmanKardon

    HarmanKardon Tubes still smell funny Subscriber

    Messages:
    43,952
    Location:
    Schwarzwald, Deutschland
    @MCD275

    I suppose it is a sort of prototype, not from Asia, or England, or somewhere else, but from Germany - in case the mains plug is the original one. The plug seems to be a German "Schutzkontaktstecker". What the hell is that in English? :idea: ;)

    Most likely a unikate made in Germany.
     
    Last edited: Oct 11, 2017
  16. MCD275

    MCD275 Member

    Messages:
    57
    Location:
    South-West Germany
    Schutzkontaktstecker = safety plug :D
    Germany never had (IMHO) 240 V. We changed in 1987 from 220 V to 230 V. Asian countries do not use 240 V as far as I know. Mostly the UK used it.
    The main plug is not an originally one. It was fitted to the power cable to fit into German sockets.

    Therefore, I do not believe the German origin. But who knows? Let see what comes up.

    Any comment will be welcome :)
     
  17. Lou F Quincy

    Lou F Quincy New Member

    Messages:
    4
    Beyond macho. I dig the three-legger design.
     

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