Audio Note M7 Line Preamp?? - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 20th May 2006, 08:19 AM   #11
diyAudio Member
 
Join Date: Dec 2002
Location: dry ol Melbourne Australia
KYW if you’re there:

for the M7 to sound really good, does it need big $ components (in the way that much of the charm of the Ongaku probably derives from its exotic components)?

Cheers
  Reply With Quote
Old 20th May 2006, 11:47 AM   #12
Previously: Kuei Yang Wang
 
Join Date: Nov 2002
Konnichiwa,

Quote:
Originally posted by rick57
for the M7 to sound really good, does it need big $ components (in the way that much of the charm of the Ongaku probably derives from its exotic components)?
You do need a reasonable level of component quality, but surprisingly, most of the components Kondo used are fairly unexceptional, except for Tantalum resistor throughout and his own handmade silver capacitors.

I would suggest that using standard Metal Film resistors (2W) and Tinfoil & Polypropylene coupling capacitors will go a long way.

AN UK has now got Silverfoil & Mylar coupling capacitors but the prices are somewhat high....

Sayonara
  Reply With Quote
Old 20th May 2006, 12:52 PM   #13
diyAudio Member
 
Join Date: Dec 2002
Location: dry ol Melbourne Australia
Thanks KYW

Assuming you can adequately compensate for the big differences in gain (I have three systems in different stages of development), your thoughts on how it might sound compared to

A finely tuned hybrid:
www.aksaonline.com/products/products_GK1.html

A device switchable from rose coloured glasses to passive, etc:
www.mapletreeaudio.com/magic5.htm

very clean and borrowed from the past, er like much blues music:
The Heretical Unity gain line stage

A supposedly “blistering fast” ring-in
www.transcendentsound.com/preamp%20kit.htm

Thanks again

Cheers
  Reply With Quote
Old 20th May 2006, 01:03 PM   #14
Previously: Kuei Yang Wang
 
Join Date: Nov 2002
Konnichiwa,

Quote:
your thoughts on how it might sound
The M7line sounds nice enough, very much "Kondo" but slightly on the warm side.

I cannot at all compare to the others, I have not heard them.

I personally prefer passive linestages nowadays, but the M7line sounds very nice for such a simple design.

Sayonara
  Reply With Quote
Old 20th May 2006, 01:36 PM   #15
diyAudio Member
 
Join Date: Dec 2002
Location: dry ol Melbourne Australia
Default to esimate laquer

Thanks KYW, that is helpful

On another note, after reading your favourable posts on the subject, I emailed Dieter Ennemoser re C37 and have yet got no response, your thoughts:

“I have several paper cone drivers of different sizes (6.5 - 15").

I understand that it does vary, but as a starting point, on average - how many ml of C37 does it take for a good result on eg a 6.5” paper cone mid?”

Cheers
  Reply With Quote
Old 15th August 2006, 02:56 AM   #16
diyAudio Member
 
Join Date: Jul 2004
Location: Bangok
Quote:
Originally posted by JPS
I use 9AU7 for this circuit in an old compauter supply.
Cheap and sound good.
Attached Images
File Type: gif 12au7-1.gif (90.0 KB, 3027 views)
__________________
PapaNohn
  Reply With Quote
Old 15th August 2006, 02:57 AM   #17
diyAudio Member
 
Join Date: Jul 2004
Location: Bangok
Another pictures
Attached Images
File Type: gif 12au7-2.gif (96.7 KB, 2884 views)
__________________
PapaNohn
  Reply With Quote
Old 21st January 2009, 12:21 PM   #18
LENB is offline LENB  United Kingdom
diyAudio Member
 
Join Date: Feb 2008
Regarding the cloned Kondo M7 preamplifier, can l straight swap
a12AU7 for a 6072A valve, the original used a 6072A, this answer
was a reply given by a member Kuei Yang Wang back in 2002 to a
member of the forum but he didnt say whether you could
without adjusting the ciriciut
can anybody help.regards LenB
  Reply With Quote
Old 22nd January 2009, 06:05 AM   #19
diyAudio Member
 
Join Date: Oct 2002
Location: SINGAPORE
Quote:
Originally posted by LENB
Regarding the cloned Kondo M7 preamplifier, can l straight swap
a12AU7 for a 6072A valve, the original used a 6072A, this answer
was a reply given by a member Kuei Yang Wang back in 2002 to a
member of the forum but he didnt say whether you could
without adjusting the ciriciut
can anybody help.regards LenB

a more suitable plug and play tube to replace the 6072 would be 12at7(ecc81), without having the need to change any parts of the circuit.
  Reply With Quote
Old 22nd January 2009, 08:45 PM   #20
smbrown is offline smbrown  United States
diyAudio Member
 
smbrown's Avatar
 
Join Date: Jun 2004
Location: Portland, OR
I built the 6072 version a number of years ago - it was my first tube preamp. I used tant resistors and AN caps (not silver). I built it with the same choke loaded supply that was in the AN schematic, tube rectified, etc. You know, it was okay, but I don't remember it as a giant killer. Overall I find I like an anode follower better. Simple and direct. Of course, highish output impedance.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Diy Line Amp Audio Note M7 xiangyi Tubes / Valves 1 31st July 2008 11:27 AM
Audio Note Preamp Circuit a good guess... ThorstenL Tubes / Valves 4 6th June 2007 11:09 PM
FS: Audio Note TRANS-010; Audio Note 20H 50mA choke; Black Gate Wk "power tank" Joseph0 Swap Meet 1 24th May 2006 05:17 AM
Audio Note Kageki vs. EAR 859 vs. Audio Innovations: The First Vortex Tubes / Valves 1 2nd February 2004 12:31 AM


New To Site? Need Help?

All times are GMT. The time now is 03:20 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2