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Author Topic: Concert Lead pilot lite?  (Read 2685 times)

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Offline malcomyoung

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Concert Lead pilot lite?
« on: October 20, 2010, 03:45:24 pm »
Does anyone know a part number or value for the pilot lite across the power switch on a Sunn Concert Lead?  I was repairing a broken lead on the cap across the power switch and broke the pilot lite in the process :-( 
Also, does this 'pilot lite' function as a fuse?  The amp seems to function even with this bulb disconnected. 
There also seems to be (what I believe to be) a diode wired in series with this bulb.  I don't see this on the schematic.  Any info on any of this would be helpful.  Thanks!
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Offline loudthud

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Re: Concert Lead pilot lite?
« Reply #1 on: October 20, 2010, 06:11:41 pm »
Not sure exactly what version of the Concert Lead you have. Most Sunn pilot lights use a neon bulb which require a resistor in series. Usually between 100K and 47K. The amp will still work after the light fails.
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Offline malcomyoung

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Re: Concert Lead pilot lite?
« Reply #2 on: October 21, 2010, 01:00:45 am »
My Concert Lead is stamped as being built in 1972.  What is the function of the pilot lite?  Should I even bother replacing it?
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Offline Isaac

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Re: Concert Lead pilot lite?
« Reply #3 on: October 22, 2010, 11:23:14 am »
The function of the pilot tight is to make it easy to tell when the amp is on.
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