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Thread: HELP! What's this valve from my Croft Preamp?

  1. #1
    Join Date: Nov 2010

    Location: Yorkshire

    Posts: 6,972
    I'm AnDreW.

    Default HELP! What's this valve from my Croft Preamp?

    I'm in the process of tube rolling everything in my Croft Pre-amp. Can someone please tell me the name of this valve?

    DSCN3529.jpgDSCN3530.jpg

    Thanks

    Andy
    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


  2. #2
    Join Date: Oct 2012

    Location: The Black Country

    Posts: 3,912
    I'm Alan.

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    Hi Andy,
    It's exactly what it appears, it is an 85A2. It is a voltage reference tube similar to this

    https://www.ebay.co.uk/itm/QUAD-RFT-...EAAOSwxu5ZMC1F

  3. #3
    Join Date: Jan 2013

    Location: Bristol

    Posts: 3,491
    I'm Justin.

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    My 211 power amps use them and I have a box full of NOS Amperex spares.

  4. #4
    Join Date: Nov 2010

    Location: Yorkshire

    Posts: 6,972
    I'm AnDreW.

    Default

    Quote Originally Posted by Firebottle View Post
    Hi Andy,
    It's exactly what it appears, it is an 85A2. It is a voltage reference tube similar to this

    https://www.ebay.co.uk/itm/QUAD-RFT-...EAAOSwxu5ZMC1F
    Alan, I wasn't 100% sure as some of the writing has worn away, but thanks for taking time to reply.

    Quote Originally Posted by User211 View Post
    My 211 power amps use them and I have a box full of NOS Amperex spares.
    Ahhhh! Have you ever tried rolling them to assess the effects?
    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. #5
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 74,974
    I'm AudioAl'sArbiterForPISHANTO.

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    Yes

    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. #6
    Join Date: Nov 2010

    Location: Yorkshire

    Posts: 6,972
    I'm AnDreW.

    Default

    Quote Originally Posted by Marco View Post
    Yes

    Marco.
    Hmmmm, according to some they shouldn't have any effect other than work as a voltage regulator.
    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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