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Old 10th April 2013, 06:09 PM   #1
Gost22 is offline Gost22  Bolivia
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Default Quality tube buffer with ECC83

Hi all!
How can I create high quality tube buffer with ECC83 for my CD-player.
Please give suggestions, or things like seeds.
Thanks for your cooperation~
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Old 10th April 2013, 06:23 PM   #2
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It's almost impossible to make a worse choice for a buffer (cathode follower) than the ECC83/12AX7. Its high RP and low gm are why.

The ECC81/12AT7 is a much better choice, among commonly available types, for cathode follower service. The 'T7 has high gm and low RP. Those are the characteristics to look for in selecting a type for buffer service.

BTW, there are much better types than the 'T7 for CF duty. The question is do you want to get involved in scrounging such bottles up.
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Old 10th April 2013, 06:28 PM   #3
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Buffer means you don't need gain. 6DJ8/6922 is a good choice for this kind of job.
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Old 10th April 2013, 07:30 PM   #4
adason is offline adason  United States
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lots of info on this page
Lukasz Fikus Lampizator
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Old 10th April 2013, 09:46 PM   #5
Gost22 is offline Gost22  Bolivia
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Quote:
Originally Posted by Eli Duttman View Post
It's almost impossible to make a worse choice for a buffer (cathode follower) than the ECC83/12AX7. Its high RP and low gm are why.

The ECC81/12AT7 is a much better choice, among commonly available types, for cathode follower service. The 'T7 has high gm and low RP. Those are the characteristics to look for in selecting a type for buffer service.

BTW, there are much better types than the 'T7 for CF duty. The question is do you want to get involved in scrounging such bottles up.
Since I have two tube ECC83!!
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Old 10th April 2013, 10:44 PM   #6
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Build yourself a nice guitaramp with the ecc83 and get a couple of nice high gm tubes like the ecc81. Smaller resistor values, more current gain, bigger input headroom and lower output impedance are your friend with a line level buffer. Things a ecc83 doesnt have. Tubes don't have to be expensive.
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