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Thread: The 6SL7GT valve & It's variants - MY ADVENTURES!

  1. #21
    Join Date: Nov 2010

    Location: Yorkshire

    Posts: 7,162
    I'm AnDreW.

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    PT IV - MULLARD MAGIC - The Mullard 6SL7GT

    This is a bit arse about tit, but these are my current reference valves, so far I've not heard better in my limited experiments.



    These valves major on detail and a good solid 3D soundstage. They are especially good with Jazz and vocals. They seem have a magical quality all to themselves when it comes to portrayal of note decay. I particularly like the snap and attack on drums, cymbals shimmer like no other valve that I have heard.
    There is plenty of space between instruments. The real magic of the Mullard is it's midband it's simply the best I have ever heard, I've never heard Miles Davis or Wayne Shorter sound as good. These valves when given a good recording can make a soundstage appear to float above, beyond and to the back of my Tannoys. All in all a very enjoyable valve, heartily recommended.

    Next - MELZ!
    SS CD Teac VRDS25X(Mega Modded) DAC Caiman SEG+Anker PSU DECK 1210 Mat Analog Studio Crystal Mods MN Base/Bearing/Platter+Ebony arm Board Feet Isonoe PSU Paul Hynes SR7EHD-27XL/DCSXL Ag DC lead/Jaeger(low-impedance) connector/3 StageRegs/Recapped PCB+No Pitch/Strobe/Light ARM SME V(Kondo Ag Rewire&Tags) MC Cadenza Black CABLES Arm Yannis SPD-4 IC Yannis 222 Litz+Ag bullets Power WAR PRE ATC SCA2 SPEAKERS ATC 50ASL STANDS Atacama PHONO Sugden Masterclass PA4 SUT Ortofon ST80SE POWER PSAudio P10

    Valve PRECroft Epoch(Mega Modded) AMP Sondex S100 SPEAKERS Tannoy 15"MG+RFC Warwick cabs+ Reference XO DECK Garrard301 MatTeunto GunMetal Bearing SPH Plinth Moldovan Arm SME 3009/3012(Ikeda Ag wired) PSU No9 MCAg Meister SPU CABLES Arm Yannis 420.5 Litz+ Speaker3mm2Ag IC Oyaide FTVS-510 AgWBT 0110Ag Phonostage Paradise/EAR 3009 Clone (Telefunken)


  2. #22
    Join Date: Nov 2010

    Location: Yorkshire

    Posts: 7,162
    I'm AnDreW.

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    Pt V - More stuff into the mix.

    It's Saturday and there are two packages waiting for me at work. The first has my Tung Sol's (which I'm now listening to).

    DSCN3523.jpg

    A shot of the Tung sol's in the Croft.

    DSCN3528.jpg

    I'm now slowly removing the other Sovtek 6H9C's out of the amp and I will eventually run just three of my chosen valves.

    I bought a single Brimar NOS 6SL7GT, now I just need to source another and we can have some fun.

    DSCN3525.jpg

    I was supposed to be reviewing the Melz 6H9C this weekend but I decided to chuck the Tung Sol's in. I've also been informed that I have another package waiting for me from the US of A with some WWII NOS 6SL7GT (General electric) I think.

    Stay tuned.
    SS CD Teac VRDS25X(Mega Modded) DAC Caiman SEG+Anker PSU DECK 1210 Mat Analog Studio Crystal Mods MN Base/Bearing/Platter+Ebony arm Board Feet Isonoe PSU Paul Hynes SR7EHD-27XL/DCSXL Ag DC lead/Jaeger(low-impedance) connector/3 StageRegs/Recapped PCB+No Pitch/Strobe/Light ARM SME V(Kondo Ag Rewire&Tags) MC Cadenza Black CABLES Arm Yannis SPD-4 IC Yannis 222 Litz+Ag bullets Power WAR PRE ATC SCA2 SPEAKERS ATC 50ASL STANDS Atacama PHONO Sugden Masterclass PA4 SUT Ortofon ST80SE POWER PSAudio P10

    Valve PRECroft Epoch(Mega Modded) AMP Sondex S100 SPEAKERS Tannoy 15"MG+RFC Warwick cabs+ Reference XO DECK Garrard301 MatTeunto GunMetal Bearing SPH Plinth Moldovan Arm SME 3009/3012(Ikeda Ag wired) PSU No9 MCAg Meister SPU CABLES Arm Yannis 420.5 Litz+ Speaker3mm2Ag IC Oyaide FTVS-510 AgWBT 0110Ag Phonostage Paradise/EAR 3009 Clone (Telefunken)


  3. #23
    Join Date: Nov 2010

    Location: Yorkshire

    Posts: 7,162
    I'm AnDreW.

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    Pt VI - The Tung Sol 6SL7GT

    Just a few notes on these fantastic valves.

    DSCN3528.jpgDSCN3523.jpg

    Miles Davis - So What - Kind of Blue

    - Very muscular double bass, with improved timbral detail. Paul Chambers Bass never sounded as moody.
    - A much fuller, midband. There was more of John Coltrane's sax just sounded so full, effortless.
    - Slightly more snap to drums with the cymbals have a little more sparkle and shimmer, Jimmy Cobb's delicate touch came forward.

    Cal Tjader - S'Wonderful - Sessions

    This 1957 recording by Chris Conner is a very close mic performance which suffers from dreadful sibilance but boy can
    she sing! I use this record more to assess the ability of a valve to dig out performace in the background. This is usually
    a very pleasent track but today I was very irritated buy the increased amount of audience noise, someone closing a door,
    someone walking across a squeaky floorboard, all details I had not heard before.

    Miles Davis - Nefertiti - Nefertiti

    Brush work on this track is to die for, again a completely sublime midband and a very muscular power bass. This
    recording really shows how cymbals can shimmer and sparkle. Plenty of space between the instruments. A very wide and
    expansive sound.


    All in all the best 6SL7GT I've heard yet, they surpass the Mullards and go top of the list. So, here the current shoot out results.

    1. Tung Sol 6SL7GT (Orange base) 9.5/10
    2. Mullard 6SL7GT (Black base) 9.25/10
    3. Slyvania 6SL7GT black base 7/10
    4. Reflektor black base 70's version 5/10

    The Tung Sols have now replaced my Mullard black base 6SL7GT as my reference.

    Stay tuned.
    SS CD Teac VRDS25X(Mega Modded) DAC Caiman SEG+Anker PSU DECK 1210 Mat Analog Studio Crystal Mods MN Base/Bearing/Platter+Ebony arm Board Feet Isonoe PSU Paul Hynes SR7EHD-27XL/DCSXL Ag DC lead/Jaeger(low-impedance) connector/3 StageRegs/Recapped PCB+No Pitch/Strobe/Light ARM SME V(Kondo Ag Rewire&Tags) MC Cadenza Black CABLES Arm Yannis SPD-4 IC Yannis 222 Litz+Ag bullets Power WAR PRE ATC SCA2 SPEAKERS ATC 50ASL STANDS Atacama PHONO Sugden Masterclass PA4 SUT Ortofon ST80SE POWER PSAudio P10

    Valve PRECroft Epoch(Mega Modded) AMP Sondex S100 SPEAKERS Tannoy 15"MG+RFC Warwick cabs+ Reference XO DECK Garrard301 MatTeunto GunMetal Bearing SPH Plinth Moldovan Arm SME 3009/3012(Ikeda Ag wired) PSU No9 MCAg Meister SPU CABLES Arm Yannis 420.5 Litz+ Speaker3mm2Ag IC Oyaide FTVS-510 AgWBT 0110Ag Phonostage Paradise/EAR 3009 Clone (Telefunken)


  4. #24
    Join Date: Nov 2010

    Location: Yorkshire

    Posts: 7,162
    I'm AnDreW.

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    Pt VII - More Slyvania. 6SL7GTY

    This is a new one to me and will be going in the pre-amp this Sunday for evaluation. Ex military stock from the 1950's. They REALLY knew how to make valves back then. Should make for an interesting comparison against my favourite Tung Sols.

    DSCN3536.jpg

    SS CD Teac VRDS25X(Mega Modded) DAC Caiman SEG+Anker PSU DECK 1210 Mat Analog Studio Crystal Mods MN Base/Bearing/Platter+Ebony arm Board Feet Isonoe PSU Paul Hynes SR7EHD-27XL/DCSXL Ag DC lead/Jaeger(low-impedance) connector/3 StageRegs/Recapped PCB+No Pitch/Strobe/Light ARM SME V(Kondo Ag Rewire&Tags) MC Cadenza Black CABLES Arm Yannis SPD-4 IC Yannis 222 Litz+Ag bullets Power WAR PRE ATC SCA2 SPEAKERS ATC 50ASL STANDS Atacama PHONO Sugden Masterclass PA4 SUT Ortofon ST80SE POWER PSAudio P10

    Valve PRECroft Epoch(Mega Modded) AMP Sondex S100 SPEAKERS Tannoy 15"MG+RFC Warwick cabs+ Reference XO DECK Garrard301 MatTeunto GunMetal Bearing SPH Plinth Moldovan Arm SME 3009/3012(Ikeda Ag wired) PSU No9 MCAg Meister SPU CABLES Arm Yannis 420.5 Litz+ Speaker3mm2Ag IC Oyaide FTVS-510 AgWBT 0110Ag Phonostage Paradise/EAR 3009 Clone (Telefunken)


  5. #25
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 77,276
    I'm AudioAl'sArbiterForPISHANTO.

    Exclamation ******* URGENT warning ****** !!!

    Oh, FFS.....

    Please tell me, DAFTEE, you've posted the wrong picture of what you've actually bought... IF NOT, and that's exactly what you've bought, then they are THE WRONG VALVES!!.

    Look what is says on the boxes in your picture above: 12SK7GTY

    Also, look at the construction, compared with the other 6SL7s you're using. It's completely the wrong item. You've bought this (a PENTODE remote cut-off valve):

    http://www.r-type.org/pdfs/6sk7.pdf

    Instead of this (a TWIN TRIODE):

    http://www.williamsonic.com/TubeDI/6SL7GT.pdf

    What you probably thought you were buying, was what I recommended earlier, which were these:



    6SU7GTY - a totally different animal....!

    Andy, DO NOT ATTEMPT TO PUT 12SK7 VALVES IN YOUR AMP, even if they fit, as if switched on, you might destroy it and/or the speakers connected to it!!

    Marco.
    http://www.thestainedglasscompany.com

    "A man is a success if he gets up in the morning and gets to bed at night, and in between he does what he wants to do" -- Milan Kundera.

  6. #26
    Join Date: Oct 2012

    Location: The Black Country

    Posts: 4,123
    I'm Alan.

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    Oh dear

  7. #27
    Join Date: Feb 2008

    Location: South Wales

    Posts: 6,604
    I'm NotTakingLifeTooSeriouslyTheseDays.

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    From the datasheet, the 6SU7 is a close substitute for 6SL7.
    I WILL CHECK AGAIN THOUGH.

    http://tdsl.duncanamps.com/show.php?des=6SU7GTY

    https://frank.pocnet.net/sheets/127/6/6188.pdf
    "Today scientists have substituted mathematics for experiments, and they wander off through equation after equation, and eventually build a structure which has no relation to reality"
    Nikola Tesla



    We Send our kids to school to be Educated, not Medicated!

  8. #28
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 77,276
    I'm AudioAl'sArbiterForPISHANTO.

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    Hi Anthony,

    The 6SU7 is a close substitute, as I use them in the Croft, and they're great. The problem is, Andy appears to have bought 12SK7s.............!!

    Scroll up mate, and read what's been posted again, particularly see the picture in post #24.

    Marco.
    http://www.thestainedglasscompany.com

    "A man is a success if he gets up in the morning and gets to bed at night, and in between he does what he wants to do" -- Milan Kundera.

  9. #29
    Join Date: Nov 2010

    Location: Yorkshire

    Posts: 7,162
    I'm AnDreW.

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    Whoa, calm down! It's the wrong picture! I've saved numerous pictures from ebay to make comparisons with respects to the various valve vintages and variants. I've not purchased a pair of 12SK7GTY's so you have nothing to worry about although I'm flattered you took the time to point out my potential f*** up.
    SS CD Teac VRDS25X(Mega Modded) DAC Caiman SEG+Anker PSU DECK 1210 Mat Analog Studio Crystal Mods MN Base/Bearing/Platter+Ebony arm Board Feet Isonoe PSU Paul Hynes SR7EHD-27XL/DCSXL Ag DC lead/Jaeger(low-impedance) connector/3 StageRegs/Recapped PCB+No Pitch/Strobe/Light ARM SME V(Kondo Ag Rewire&Tags) MC Cadenza Black CABLES Arm Yannis SPD-4 IC Yannis 222 Litz+Ag bullets Power WAR PRE ATC SCA2 SPEAKERS ATC 50ASL STANDS Atacama PHONO Sugden Masterclass PA4 SUT Ortofon ST80SE POWER PSAudio P10

    Valve PRECroft Epoch(Mega Modded) AMP Sondex S100 SPEAKERS Tannoy 15"MG+RFC Warwick cabs+ Reference XO DECK Garrard301 MatTeunto GunMetal Bearing SPH Plinth Moldovan Arm SME 3009/3012(Ikeda Ag wired) PSU No9 MCAg Meister SPU CABLES Arm Yannis 420.5 Litz+ Speaker3mm2Ag IC Oyaide FTVS-510 AgWBT 0110Ag Phonostage Paradise/EAR 3009 Clone (Telefunken)


  10. #30
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 77,276
    I'm AudioAl'sArbiterForPISHANTO.

    Default

    Quote Originally Posted by REXTON View Post
    Whoa, calm down! It's the wrong picture! I've saved numerous pictures from ebay to make comparisons with respects to the various valve vintages and variants. I've not purchased a pair of 12SK7GTY's so you have nothing to worry about although I'm flattered you took the time to point out my potential f*** up.
    Lol - thank fuck for that!

    I thought that might've be the case, hence why I mentioned it. So..... What did you *actually* buy, and could we have a picture of that instead?

    Marco.
    http://www.thestainedglasscompany.com

    "A man is a success if he gets up in the morning and gets to bed at night, and in between he does what he wants to do" -- Milan Kundera.

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