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Old 4th April 2011, 09:32 PM   #21
Cassiel is offline Cassiel  Libya
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SRPP+ All-in-One & Mu Followers
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Old 5th April 2011, 01:51 AM   #22
limono is offline limono  United States
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Yep, all that hatred of ECC82/12au7 didn't stop Audio Note and Kondo from incorporating that valve in their most expensive preamps.

Last edited by limono; 5th April 2011 at 01:54 AM.
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Old 5th April 2011, 02:00 AM   #23
radio is offline radio  Macedonia
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Thumbs up High-End Preamplifier with ECC82 - Project!!

Quote:
Originally Posted by GoranB View Post
Here is one, maybe not High-End but with ECC 82 as you wanted.

Pozdrav zemo
Hvala na shemi zemo!
Thanks to scheme "zemo"!

It is time to help someone and to show a good scheme or project of "High-End preamplifier with ECC82 (12AU7)", preamplifier or can be with ECC88!
Believe me, I'm very need for the graduation work.
Thanks!

Last edited by radio; 5th April 2011 at 02:21 AM.
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Old 5th April 2011, 04:30 AM   #24
GoranB is offline GoranB  Poland
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Quote:
Originally Posted by radio View Post
Hvala na shemi zemo!
Thanks to scheme "zemo"!

It is time to help someone and to show a good scheme or project of "High-End preamplifier with ECC82 (12AU7)", preamplifier or can be with ECC88!
Believe me, I'm very need for the graduation work.
Thanks!
Ovaa shema ja koristam vo momentov:
Im using this circuit:
Instead of 5842 I use PCC88 with one red-led for biasing.
Instead of E182CC - 12BH7
Attached Images
File Type: gif ciuff_nc2.gif (6.4 KB, 1453 views)
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Old 5th April 2011, 11:33 AM   #25
radio is offline radio  Macedonia
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Thumbs up High-End preamplifier with ECC82

Quote:
Originally Posted by GoranB View Post
Ovaa shema ja koristam vo momentov:
Im using this circuit:
Instead of 5842 I use PCC88 with one red-led for biasing.
Instead of E182CC - 12BH7
Dali si pravel nekakvi merenja? Dali preovladuva vtoriot harmonik
Bidejci toj go dava onoj poznat lampaski zvuk
Zemjak dali imas nekoja kvalitetna sema na predzasiluvac so ECC82 ili so ECC83 zaedno so napojuvanjeto?
Pozdrav

Are you some kind of right measurements?
Does second harmonic prevails among this Amplifier?
Because that gives one go Lampasko sound familiar
Greeting

Last edited by radio; 5th April 2011 at 11:35 AM.
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Old 5th April 2011, 12:17 PM   #26
GoranB is offline GoranB  Poland
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HeadWize - Project: No-Compromise OTL Tube Headphone Amplifier by Andrea Ciuffoli

Here you can find all about circuit i've sent above. Im using this preamp with PF 99 SE topology.
I didnt measure it, but it sounds ok. Also you can use just the gain stage with ECC 82 or PC88 just you have to setup the catode bias. A lot depends what power amp you want to use.
About circuits with ECC82 or 83 (in the most cases ECC83 is used for phono preamps) i should also search on net. If i find something ill send here.
You can also look at thread "No NFB headphone preamplifier". Vladimir designed very interesting preamp (SE topology). FET's are used there.

Pozdrav
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Old 6th April 2011, 02:23 AM   #27
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Quote:
Originally Posted by stalker View Post

BTW, schematic was recommended by Bruce Rozentblitz. Probably misspelled.

EDIT - Mine has a different power supply.
Here is a link to a completed project based on that schematic.

( Link removed due to malware warning. )

Regards,

analogadikt
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Old 6th April 2011, 03:01 AM   #28
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Speaking of mu follower. Is there any reason why both outputs could not be used simultaneously as long as both loads are sufficiently high for their respective outputs? If you could load the HiZ output with your main amp (tube amp) and drive a solid state sub amp out of the LowZ output at the same time it could be very convenient. I realize that you could do the same thing with standard CC and a CF buffer but the MF would seem to also provide better PSRR.
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Old 6th April 2011, 10:45 PM   #29
radio is offline radio  Macedonia
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Thumbs up High-End preamplifier with ECC83 (12AX7)

Hello All!
Attached Images
File Type: jpg Tube Preamp with ECC83.jpg (77.5 KB, 1293 views)
File Type: jpg Tube Preamp_1.jpg (289.6 KB, 1177 views)

Last edited by radio; 6th April 2011 at 11:04 PM.
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Old 6th April 2011, 10:58 PM   #30
radio is offline radio  Macedonia
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Thumbs up High-End preamplifier with ECC83 (12AX7)!

Hello ALL!
Here's the picture here shows the High-End preamplifier with ECC83, which I did.
Measurements are given below. Second harmonic is 0.8%, and the third is only 0.15%.
Here is the data and characteristics frekvensiska preamp, ... is it true High-End preamplifier with ECC83.
P.S.
I was looking for a project to exchange.... but that's it, we go ... poor English ...
Greeting
Best Regard
Pozdrav zemjak!!
Attached Images
File Type: jpg ECC83 band plus dist V11.jpg (148.5 KB, 1128 views)
File Type: jpg Tube Preamp with ECC83.jpg (77.5 KB, 1080 views)

Last edited by radio; 6th April 2011 at 11:22 PM.
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