#1
|
||||
|
||||
C2600 tube rolling
Can anyone tell me why 5 tubes are 12ax7 but the main output tube is 12at7?
When rolling tubes will this matter if a 12ax7 is used as main output instead of 12at7? |
#2
|
||||
|
||||
akitared.......The 12AX7 and 12AT7 tubes are pin compatible but the gain of the 12AT7 is lower by approximately 40%. The 12AT7 also has a higher plate voltage which generally equates to a better signal to noise ratio and a bit more dynamic range. I am not certain about the 12AT7's output impedance but that may be part of the reason it is in the final output stage of the C2600. I would not install a 12AX7 in place of the 12AT7 if it were my preamp.
__________________
Dan STUDIO - McIntosh C1000C/P, MC2301 (2), MR88, Aurender N10, Esoteric K-01X, Shunyata Sigma spdif digital cable, Sonos Connect, PurePower 2000, Stillpoints, Furutech Flux 50, Michell Gyro SE, Michell HR Power Supply, SME 309, Ortofon Cadenza Black, Wireworld, Sonus faber Amati Anniversario LIVING ROOM - McIntosh C2300, MC75 (2), MR85, Magnum Dynalab 205, Simaudio MOON Neo 260D-T, Schiit Audio Yggdrasil, Aurender N100H, Shunyata Sigma USB cable, Micro Seiki DD40, Ortofon Cadenza Blue, Nakamichi BX-300, Sony 60ES DAT, PS Audio P10, Furutech Flux 50, Sonos Connect, Stillpoints, Wireworld, Kimber, PMC EB1i, JL Audio f113 VINTAGE - McIntosh MA230, Tandberg 3011A tuner, Olive 04HD, Sony DTC-59ES DAT, McIntosh 4300V, JBL 4312A Last edited by jdandy; 04-04-2017 at 10:18 PM. |
#3
|
||||
|
||||
Good post! As always.
__________________
Main Equipment: Kharma Elegance dB11-S, JL Audio F113v2 X 2, Block Audio Line & Mono SE Amplification, Bricasti M21 DAC, Antipodes Kala K-50 Server Power: Shunyata Everest 8000, Sigma XC v2, Sigma NR v2, Block Audio PCs, Defender, ADDPowr Wizard Grounding: Shunyata Altaira CGS - 4 X Alpha CGS cables, Network : Supra Cat 8+, Twin (Nenon) Modified Buffalo GS2016 Switches, Keces P3 LPSU, Cables: Wireworld Platinum 8 USB, Wireworld Platinum Eclipse 8 Speaker cables, 6M & 1M Tubulus Concentus ICs, Other: Multiple GIK products, Stillpoint Apertures, Stillpoint Minis and Ultra SS, Three 20 Amp lines, Furutech GTX - Gold outlets, Adona Rack |
#4
|
||||
|
||||
Thank you for the detailed reply.
So I can replace the main output tube with only another 12at7? Golden Lion for instance? |
#5
|
||||
|
||||
Quote:
Gold Lion 12AT7 tubes are very good. I have used them in my two MC2301 power amps. Another excellent 12AT7 is the Siemens ECC801S. I used that tube for several years with very good performance. Right now I have just past the 100 hour mark on four (two in each MC2301) Siemens E81CC (12AT7) tubes and really liking what I hear. These tubes reveal amazing resolution, although they have taken the full 100 hours of break-in to settle, being initially bright. The neat thing about the 12AT7 being the last dual triode tube in the signal path of the C2600 is you can roll in just a single 12AT7 of your choice and will find that it effectively tailors the preamp's output to the tube. Rolling one tube at a time is far less expensive than rolling two or four tubes at a time. Have fun, but don't swap the 12AT7 for a 12AX7.
__________________
Dan STUDIO - McIntosh C1000C/P, MC2301 (2), MR88, Aurender N10, Esoteric K-01X, Shunyata Sigma spdif digital cable, Sonos Connect, PurePower 2000, Stillpoints, Furutech Flux 50, Michell Gyro SE, Michell HR Power Supply, SME 309, Ortofon Cadenza Black, Wireworld, Sonus faber Amati Anniversario LIVING ROOM - McIntosh C2300, MC75 (2), MR85, Magnum Dynalab 205, Simaudio MOON Neo 260D-T, Schiit Audio Yggdrasil, Aurender N100H, Shunyata Sigma USB cable, Micro Seiki DD40, Ortofon Cadenza Blue, Nakamichi BX-300, Sony 60ES DAT, PS Audio P10, Furutech Flux 50, Sonos Connect, Stillpoints, Wireworld, Kimber, PMC EB1i, JL Audio f113 VINTAGE - McIntosh MA230, Tandberg 3011A tuner, Olive 04HD, Sony DTC-59ES DAT, McIntosh 4300V, JBL 4312A Last edited by jdandy; 04-04-2017 at 10:51 PM. |
#6
|
||||
|
||||
Quote:
Thank you for the wisdom, as you can tell this is my first experience of Tubes |
#7
|
|||
|
|||
I apologize for bumping what is an old thread, but it relates directly to something I just discovered in my C2600...
I was in the process of swapping some NOS Mullard 10M Master Series tubes in, when I noticed that all the tubes in my c2600 are factory 12AX7As. Yes, I had a 12AX7 in the output position... |
#8
|
|||
|
|||
i just picked up a C2600 and i'm already ready to roll the tubes. this is exactly why i didn't want a tubed preamp, lol. i'm new here, looks like a great place, thanks for having me.
|
#9
|
|||
|
|||
Speaking of tubes ... the president of the old Audio Tube Enthusiasts Group has a shop right here in Orlando, FL - The group went by the way side but the tube inventory is still going strong - Lots of used and New Old Stock ... NOS tubes - If you are close by or passing through worth a visit
Kept me entertained rolling tubes for years I have no affiliation other than fond memories https://vacuumtubesinc.com/ ... ask for Jim |
#10
|
|||
|
|||
after a few weeks of owning the C2600 I see what all the fuss is about. last night during a listening session I noticed some really nice imaging. wow !!!!
|
Thread Tools | |
Display Modes | |
|
|
Audio Aficionado Sponsors | |