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Audio Note Preamplifiers: M10 Line preamp, M9 phono, …
http://www.dejavu-audio.com/audio-note-preamps.html
M5 Line / Phono Preamp. Level Three top line pre-amplifier with Audio Note™ tantalum resistors, 5687 line stage with novel power supply design based on the patented M10 power supply design, 6X5, OB2, ECL82, Audio Note™ filter cap …
ecc82 5687 preamp! audionote | diyAudio
https://www.diyaudio.com/community/threads/ecc82-5687-preamp-audionote.231376/
Hi all, can I sub 6sn7 in place of ecc82 in this schematic? i have this as outputstage in my dac and it sounds very good, but i have plenty of 6sn7's id like to use. do i need to change the plate and kathode resistors of the ecc82s to accommodate the 6sn7's? the b+ voltage is 260v thanks fellas
Best 5687 Tubes - ACA
http://www.aca.gr/index/hiend/hiendArticles?row=2609
The 5687 was known by Mr. Hiroyasu Kondo of Audio Note Japan.. Best of all 5687’s are considered the Gold Brand - Gold Pin NOS Sylvania GB5687 (GB = Gold Brand) with next to NOS Tung Sol with ribbed plates circa 1950-1960 or black …
Tube Linestage preamp… the beginning | D a r k L a n t e r n
https://darklanternforowen.wordpress.com/2014/01/21/tube-linestage-preamp-the-beginning/
The 5687 is a nice, low distortion, 9-pin twin triode, developed by Tung-Sol in the 1940s for industrial-military use. 5687 plate curves look impressively parallel – if you get sweaty over these things. In audio, the 5687 was chosen by Hiroyasu Kondo for his legendary Audio Note Ongaku amplifier (and other Kondo designs).
AN Preamplifiers - AudioNote
http://audionote.vn/AN_Preamps.htm
Level Three line pre-amplifier with 5687 line stage and Audio Note™ tantalum resistors, simplified choke smoothed 6X5 rectified power supply with Audio Note 1 watt tantalum resistors and in-house designed and wound I-E core output transformers. ***Manual M3 Line. Level Three top line pre-amplifier with Audio Note™ tantalum resistors, 5687 line stage with novel power …
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