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

  1. #11
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 75,084
    I'm AudioAl'sArbiterForPISHANTO.

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    The 50s ones have dark black anodes, not grey

    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.

  2. #12
    Join Date: Nov 2011

    Location: Manchester, UK

    Posts: 165
    I'm Simon.

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    Quote Originally Posted by Marco View Post
    The 50s ones have dark black anodes, not grey

    Marco.
    I think it's just the lighting on the photo I chose from Google :-)
    The one I have had always had gloss black anodes. :-)


    Sent from my SM-G930F using Tapatalk
    SJS Arcadia Line Level Pre-amplifiers, Headphone amps, MM Phono Stages and SET Power amps - service, repairs, upgrades

  3. #13
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 75,084
    I'm AudioAl'sArbiterForPISHANTO.

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    Fairy muff

    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.

  4. #14
    Join Date: Nov 2010

    Location: Yorkshire

    Posts: 6,975
    I'm AnDreW.

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    Jim, this is for you!

    A shot of the 5 valves which control the MM stage, the tape/in out, aux and also L+R channel out to power amp.

    A few mods. We have Yannis Tome intrinsic wiring to the MM stage and the L+R output channels. Finally silver WBT RCA;s. The far right valves (last two) are the Mullard 6SL7GT which I re-installed. All the other goodies are elsewhere in the amp!

    DSCN3519.jpg


    These have just come out of the pre-amp RCA 6SL7GT not sure of the vintage. Some notes coming up at some point.

    DSCN3520.jpg

    Enjoy.
    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 3012(Ikeda Ag wired) PSU NSC MCAg Meister SPU/DECCA Maroon CABLES Arm Yannis 420.5 Litz+ Speaker3mm2Ag IC Oyaide FTVS-510 AgWBT 0110Ag Phonostage Paradise


  5. #15
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 75,084
    I'm AudioAl'sArbiterForPISHANTO.

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    Hi Andy,

    Those other valves in your amp with black bases (not the Mullards) are fairly generic Russian valves, which are ok, but nothing special. You can do considerably better! What you need are these boys, proper 6H8C (the 6H9C you need look identical), made in the Melz factory during the 1950s:



    The thing to look out for are the distinctive holes in the anodes... Those are stunning sounding valves, with really airy highs and superb dynamics.

    Also, the Mullards you're using are also fairly generic, and I suspect simply re-badged Sylvanias. What you need are these, 1950s 'Tall Boy' brown short-bases:



    Themz PROPA! And a totally different ball game to what you're using.

    Trust me, if you can find what I've recommended above, and fit them in your amp, you'll be blown away by what you hear!

    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. #16
    Join Date: Nov 2010

    Location: Yorkshire

    Posts: 6,975
    I'm AnDreW.

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    Marco,

    The left three valves are all non-military spec Reflektor valves which came with the amp. The other two could well be re-badged Slyvania's but they sound so different and better to the two which I've just removed. I have a two types of Melz coming from our Russian friends and for the price I'm not complaining. I'm probably going to get a lot of enjoyment trying the Russian valves and it works out cheaper than a night on the tiles (but without the hangover)! I'm working on sourcing a pair of Mullard brown bases and also a pair of Brimar 6SL7GT's! All good fun. Just out of interest, I have a question for you regarding the left three valves. The far left valve is for the MM stage (which I don't use), have you any idea which of the remaining two controls the AUX RCA input? I'm thinking on experimenting with this valve as I think I can get more from the pre-amp this way .
    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 3012(Ikeda Ag wired) PSU NSC MCAg Meister SPU/DECCA Maroon CABLES Arm Yannis 420.5 Litz+ Speaker3mm2Ag IC Oyaide FTVS-510 AgWBT 0110Ag Phonostage Paradise


  7. #17
    Join Date: Jan 2013

    Location: Birmingham

    Posts: 3,396
    I'm James.

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    Quote Originally Posted by REXTON View Post
    Jim, this is for you!

    A shot of the 5 valves which control the MM stage, the tape/in out, aux and also L+R channel out to power amp.

    A few mods. We have Yannis Tome intrinsic wiring to the MM stage and the L+R output channels. Finally silver WBT RCA;s. The far right valves (last two) are the Mullard 6SL7GT which I re-installed. All the other goodies are elsewhere in the amp!

    DSCN3519.jpg


    These have just come out of the pre-amp RCA 6SL7GT not sure of the vintage. Some notes coming up at some point.

    DSCN3520.jpg

    Enjoy.
    Thanks Andy, those valves are quite big beasts! Need to see the rest of the amp!

  8. #18
    Join Date: Oct 2012

    Location: The Black Country

    Posts: 3,919
    I'm Alan.

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    Quote Originally Posted by REXTON View Post
    The far left valve is for the MM stage (which I don't use), have you any idea which of the remaining two controls the AUX RCA input?
    It's much more likely that the first two valves are for the MM, the same as Croft amp using the smaller 9 pin valves.
    The third could well be a cathode follower also associated with the MM input, I haven't had direct contact with this type of pre.

    To prove it you could take out these two (3) valves and see if the Aux still functions.

  9. #19
    Join Date: Nov 2010

    Location: Yorkshire

    Posts: 6,975
    I'm AnDreW.

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    Quote Originally Posted by Firebottle View Post
    It's much more likely that the first two valves are for the MM, the same as Croft amp using the smaller 9 pin valves.
    The third could well be a cathode follower also associated with the MM input, I haven't had direct contact with this type of pre.

    To prove it you could take out these two (3) valves and see if the Aux still functions.
    I did think of this about 30 seconds after I posted.
    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 3012(Ikeda Ag wired) PSU NSC MCAg Meister SPU/DECCA Maroon CABLES Arm Yannis 420.5 Litz+ Speaker3mm2Ag IC Oyaide FTVS-510 AgWBT 0110Ag Phonostage Paradise


  10. #20
    Join Date: Nov 2010

    Location: Yorkshire

    Posts: 6,975
    I'm AnDreW.

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    PT III - Valve madness

    OK, The Melz have arrived and I have now just purchased these badboys

    I managed to find one of these for 13!!!! Now just need to find another. I'm in no rush.



    I also pushed the boat out and got a couple of these



    I also have a single Brimar 6SL7GT on its ways. So it looks like the Melz going in this weekend.

    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 3012(Ikeda Ag wired) PSU NSC MCAg Meister SPU/DECCA Maroon CABLES Arm Yannis 420.5 Litz+ Speaker3mm2Ag IC Oyaide FTVS-510 AgWBT 0110Ag Phonostage Paradise


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