SOund of 3B28 vs. 866A - diyAudio
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Old 13th March 2008, 02:55 AM   #1
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Default SOund of 3B28 vs. 866A


Has anyone compared the sound of the 3B28 xenon rectifier vs. the 866A and 83 mercury types? If so, which do you prefer and why?


-- josé k.
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Old 13th March 2008, 03:36 AM   #2
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They are interchangeable in most circuits. I have both, you can borrow them when you get that monster built. 3B28 has a pale purpleish white glow visible only at relatively high current in a dark room.

FG32's are in the truck, remind me tomorrow.
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Old 13th March 2008, 05:34 AM   #3
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Monster eh, sounds interesting

I remember seeing a post about the 866 having less sag, but i can't find it. More sag will make your amp sound more like a tube amp.

The 866 will also need a few minutes warm up time where as the 3B28 does not.
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Old 13th March 2008, 09:48 AM   #4
Gluca is offline Gluca  Italy
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Originally posted by ak_47_boy

The 866 will also need a few minutes warm up time where as the 3B28 does not.
Nah ... 10-30 secs are enough if you use the tube every day. Warm it 1 hour or more after the first installation before applying any high voltage. If it doesn't light up after a couple of attemps and it keeps on blowing your fuses just forget it, sometime it happens with MV rectifiers.

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Old 13th March 2008, 03:19 PM   #5
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to me the 3B28 has a solid state sound whereas I find mercury to be very full and musical.

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