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Old 1st December 2009, 10:11 AM   #1
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Join Date: Dec 2009
Lightbulb EC900 for Headphone amplifiers

Hi to all

I would like to build an amplifier with small tubes as EC900 or similar
in website I have found this Adam's Amplifiers: Subminiature
very interesting, but I prefer the classic tubes with base.
Is EC900 a good choice ?

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Old 2nd December 2009, 01:04 PM   #2
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Join Date: Dec 2009
My idea is to supply all with 12V lead battery with a self oscillating stage for H.T.
Because I do not trust myself of mains supply especially with in-ear headphone

I have found in my old-stuff these tubes : EC900 ,6AF4A,
Can I use them ? or is better a classic ECC82/3/8 ?
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Old 2nd December 2009, 03:35 PM   #3
Gordy is offline Gordy  United Kingdom
diyAudio Member
Join Date: Nov 2006

Some reading for you…

Some interesting headphone amps using small tubes on this page:
Pete Millett's DIY Audio pages

Some general tube headphone projects here:
HeadWize Library - Projects
HeadWize Library - Projects

Mini tube project here:
6088 subminiature tube Hybrid: The BIC revisited • DIY Audio Projects Forum

and here:
Hermanns Mini-Amp
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