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AUDIO FORUMS >> General Discussion and Support >> Zen select input tube bias - Anyone mod for LED?
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Message started by nubz69 on 05/25/13 at 18:34:04

Title: Zen select input tube bias - Anyone mod for LED?
Post by nubz69 on 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.

Title: Re: Zen select input tube bias - Anyone mod for LED?
Post by clowkoy on 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.

Title: Re: Zen select input tube bias - Anyone mod for LED?
Post by nubz69 on 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