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05/05/24 at 16:53:05

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Zen select input tube bias - Anyone mod for LED? (Read 3110 times)

nubz69 Verified Member Posts: 27	Zen select input tube bias - Anyone mod for LED? 05/25/13 at 18:34:04 I'm just curious if anyone has tried using an LED bias for the input tube on their amplifier and if it was a worthwhile mod.
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clowkoy Senior Member Posts: 55	Re: Zen select input tube bias - Anyone mod for LED? Reply #1 - 05/25/13 at 20:30:09 You can try 2 hlmp 6000 in series same as what I did with the zkit/zstage (12au7). I didn't like the sound though.
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nubz69

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Posts: 27

Re: Zen select input tube bias - Anyone mod for LED?
Reply #2 - 05/27/13 at 01:33:37

Just modded my amp. Now one switch setting is the original high bias level and the other is led biased. There is a very clear improvement accross the board with the led bias. I have had this amp for 10 years and I still love it. This is my first major mod to the amp. If I try anything else I may put a ccs on the output tubes.

Here is some more info on led bias.
http://www.diyaudio.com/forums/tubes-valves/76025-ping-sy-led-cathode-bias.html

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