MC2105 LED Lighting

Discussion in 'McIntosh Audio' started by drsiebling, Nov 10, 2017.

  1. drsiebling

    drsiebling New Member

    Messages:
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    Hello everyone - I thought that those of you who might be interested in a good source for LED lighting for the MC2105 and MC2505 might find this interesting. I’ve bought several LED lighting kits for my 2105s over the years and none have been particularly great - some have been dim, they’ve all been unable to illuminate the red dash on the faceplate. However, I’ve finally found a kit that does everything right - both for the meters and the green and red portions of the glass faceplate. The seller is on eBay - I’m not affiliated with him, but I did just install his custom LEDs in my 2105 and I’m very pleased. I have an audio classics LED kit in my C41, and this 2105 kit is every bit as bright as the audio classics kit.

    Photos:
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    Here’s the link to the LED kits:

    McIntosh MC2105 & MC2505 Power Amplifier Hi Output LED Bulb & Filter Upgrade Kit https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.com/ulk/itm/192346082298
     
  2. clinic-audio

    clinic-audio all on YAMAHA untill 1990

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    I am sorry but I don't understand this obsession to replace original bulb by LED ?
    Are you aware about something called temp color ?
     
  3. sKiZo

    sKiZo Hates received: 8641 Subscriber

    The OP is probably even more aware of the color brown ... ;-}

    [​IMG]

    Even going with incandescents, it's tricky trying the exact color gels needed to match the original color exactly. Not gonna say the gels provided with the kit are an exact match, but at least with LEDs yall don't have to worry about them burning from the hot spots.
     
  4. drsiebling

    drsiebling New Member

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    Location:
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    Color temperature? Yes - very familiar.

    The reason some of us want to replace the incandescent lamps in our Mcintosh gear, is because they aren’t particularly bright and don’t mesh well with modern Mcintosh gear, and because incandescents give off a significant amount of heat which causes delamination of the glass front panels and discoloration of the blue meter filters. Incandescents also don’t last very long and changing them out is a bit of a pain in the ass.

    If the appropriate LEDs can be sourced, in color temperature, voltage, etc... why wouldn’t you want to use them?
     
  5. clinic-audio

    clinic-audio all on YAMAHA untill 1990

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    Color temperature? Yes - very familiar. Good ! but this is not the only "problem" you can get when using LED with the old MCINTOSH units .

    Never forget that they were made a long time ago and LED do not exist the way they do today . Too many different models with too different specifications.
    When a bulb is used the filament come in the right place through the diffuser (light box) and the light follow his way . If you want to use a LED you are not in ablity to place anything and the light will not be the same everywhere .
    If you wish to use LED to do the job , perfect , made a drastic sort with a cell to match every LED to get uniforme light and once you bought thousand pieces to get 20 LED 100% identical (lucky men you are)
    Do you think this is an economic way to work ?
    Why do you think that AUDIOCLASSIC stop to supply them ? Because result is not always perfect and they (like me) like perfection when you work on MCINTOSH product .
    The new production is totally different and most important detail : they are made for this , not the old models .
    Matching the old with the new , I understand that , but your unit are not original . Don't tell me the the unit is heavy and changing bulb is not easy ....I work on MCINTOSH over 40 years now , and I never replace a bulb two times in the same unit (better to replace all in once).
    and because incandescents give off a significant amount of heat which causes delamination of the glass front panels , sorry but you don't have correct information because the factory glue a shield (metallic) in front of every bulb to preserve the ink on the glass .So cold light is not a good argument for me . Many front glass are damaged but not because of the heat of the bulbs . Every front glass I have refixed were not affected by light .
    and discoloration of the blue meter filters . True ! but what is the problem to replace filter when you replace the bulb ? most of case I see in meters is damaged light box by overheating inside caused by wrong bulb used by silly reason of price . Pay the right parts is not a question of money , it is a reason to use the right part, with the right specifications, at the right place
     
  6. drsiebling

    drsiebling New Member

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    Location:
    Dallas
    Thanks for your input - as someone who has owned Mcintosh gear for several decades, my point in posting was to let those that are interested know that there’s a kit available that accurately illuminates the front panel and meters, using the correct voltages, and delivers a brighter panel more in line with modern Mac gear, in the correct color temperature.

    And yes, the heat from the bulbs does cause issues with the printing on the front panel glass. I’ve seen it and so have many others. Less heat in an amplifier is never a bad thing.

    If you don’t want LEDs in your vintage gear, then don’t put them in. For me, I’m very happy with this upgrade. And, I don’t have to risk cracking the glass every 4-6 months when I’d normally have had to replace incandescent lamps.
     
  7. clinic-audio

    clinic-audio all on YAMAHA untill 1990

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    yes this is true gels do not match because of temp color of the LED
    These MC2205 meters go closer to the catastrophic situation ...But what is the surprise if this amp is working over 30 years ? Replace bulbs and gels and everything goes back to normal shape, no ?
     
  8. clinic-audio

    clinic-audio all on YAMAHA untill 1990

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    Hello drsiebling

    If you don’t want LEDs in your vintage gear, then don’t put them in. As many MCINTOSH specialist I always keep everything original in units , never mods . Owner's can make "tuning" on their own units if they like that . My job is to preserve original condition for units coming from my worlwide customers .

    For me, I’m very happy with this upgrade. Good, my answer was not made to change your mind
    And, I don’t have to risk cracking the glass every 4-6 months when I’d normally have had to replace incandescent lamps. I never broke a glass in 40 years during bulb replacement , even with front panels in poor conditions .
    If you have to change your bulb every 4 to 6 month in your unit , then you have a problem with the light voltage (6,3V in MC2205 Meters ) or the bulbs you are using don't come from the factory and their life time is not the right one ! 5000 hours minimum for #GE1866
     
    darkblue94 and AlTinkster92 like this.
  9. c_dk

    c_dk Addicted Member

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    Skizo

    The discoloration you pictured is caused by the grayish clear filter in between the two colored filters as used in the MC2205's meters.

    Typically the two filters with shades of blue are not affected......go figure.
     
  10. drsiebling

    drsiebling New Member

    Messages:
    13
    Location:
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    The lamps aren’t failing in 4-6 months, but they do appreciably dim. There’s nothing wrong with the voltages on my 2105s.

    However, when you’re using a modern Mcintosh preamplifier, there’s a huge difference in the amount of light coming from the front panel. With this upgrade, my 2105 is now as bright as my c41. It’s a nice look and it doesn’t compromise any of the performance of the amp. And, it’s a perfect match.

    For the record, Audio Classics does still sell LED upgrades.
     
  11. clinic-audio

    clinic-audio all on YAMAHA untill 1990

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    Hello

    For the record, Audio Classics does still sell LED upgrades. sorry but this not what I read in another post they send months ago ,
    I don't understand why your bulbs do appreciably dim , not normal at all . After many years OK not after some month .There is someting strange there
     
  12. drsiebling

    drsiebling New Member

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  13. 62caddy

    62caddy Trust but verify Subscriber

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    The white meter housings on my MC2125s and MC2155 are extremely brittle due to the excessive heat generated from the three fuse-type lamps used in each meter unit. Also, getting the blue meters to match in all three amplifiers was an impossible task. Once I installed the LED replacements, the blue is a perfect match between all three amplifiers and the front panel and top cover are noticeably cooler. And of course what a relief it was not to have to fiddle about trying to match those infernal gels! ;) ...and the LEDs should never have to be replaced again.

    Ryan even commented how good they look and how similar the resulting appearance is to current McIntosh products.

    My only [small] complaint is the LEDs are quite bright however.

    I left original incandescents in for the festoon (panel) illumination.
     
    Last edited: Nov 13, 2017
  14. damacman

    damacman Blown and Injected Subscriber

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    I'm all for info that helps us achieve even illumination with LEDs with Mc gear.
     
  15. damacman

    damacman Blown and Injected Subscriber

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    Caddy, this would be easy to address via an inline voltage dropping resistor on the illumination B+. A 1k-5k Ohm linear taper pot would help you to determine what value would provide the desired brightness. A very simple task for AC.
     
  16. 62caddy

    62caddy Trust but verify Subscriber

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    Hmmm...:idea:
     
  17. pgena

    pgena Member

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    Location:
    Chicago
    Just sayin'

    4 #1866 6.3v .25A and 4 #1888 7v 0.5A (meters)
    or
    4 #1888 MINIATURE BULB BA9S BASE (meters)

    OR from Terry DeWick (easy to find these without RS):
    You can use #47 6.3v 150 mA bulbs from Radio Shack to save ordering, they work well in a MC2105 all the way.
     
    Last edited: Nov 15, 2017 at 3:36 PM

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