Harman Kardon hk 330i

Discussion in 'Dollars and Sense' started by MystikCabs, Sep 7, 2008.

  1. MystikCabs

    MystikCabs tubes & tonewoods

    I have a Harman Kardon hk 330i stereo reciever. Just wondering if it's worth hanging on to for tunes out in the garage or is it better than that?
  2. jpdylon

    jpdylon non-active member...

    The 330i was not one of the better designs. They run very hot and usually need some resoldering. Also, the driver stage in the amplifier uses very underrated transistors that can easily fail. The tuner is OK, but really overall there is better out there from HK.

    Unless you can get it for a song I would pass IMHO.
  3. Sir.Byrd

    Sir.Byrd Lunatic Member

    I had a problem with the transistors in the driver stage of my PM-640 and Ecluser and Terra1 worked on a procedure to replace the transistors with a higher rating to reduce heat. I also have a 330i, should work the same on it.
  4. Sir.Byrd

    Sir.Byrd Lunatic Member

  5. MystikCabs

    MystikCabs tubes & tonewoods

  6. terra1

    terra1 Addicted Member

    I actually didn't replace any transistors on the PM640 because they didn't have a complete set at Fry's.

    So, I just replaced two original 56 ohm resistors with 1/4 watt 220 ohm resistors I got at Fry's. A pack of 4 cost 95 cents. After that the temp in the PM640 driver heat sinks dropped from about 69 degrees centigrade to 38-40 degrees centigrade.

    I also have an HK 330i and it doesn't seem that hot at least not as bad as the original PM640 before replacements. The heat fins on my HK 330i measure about 29-33 degrees centigrade, and the heat sink on the single transistor is about 51-57 degrees centigrade at its hottest point.

    But up to you if you want to get something better. I would try it while you have it though.

    It's one of the sweetest, warmest sounding receivers I have and nice detail too.

    The only shortcoming is it sounds better than it's pillbox looks. You may want to adjust the amp's idle current to optimize it. I think I noticed a more 3D richer sound.
    http://manuals.harman.com/hk/Service Manual/hk330i sm.pdf

    If you do some research, vintage HK can be a crapshoot. I passed on an HK 330B awhile back because of tuner distortion (not just static) during a demo. The seller later reflowed the solder and said it was fine, but I still passed based on a combination of price, cosmetic condition and didn't want to waste another trip.
  7. Sir.Byrd

    Sir.Byrd Lunatic Member

    Woops I misspoke!
  8. terra1

    terra1 Addicted Member

    Not a biggie since we were talking about replacing the transistors too.

    It's just that as I said, Fry's was out of some transistor replacements. So I at least replaced the resistors as recommended by ecluser. That alone brought the temperature down.

    So I'm not that concerned or in a rush to do the transistors.

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