Toshiba Ouput Tranistors 2SD424 & 2SB554 (many Adcoms)

ben62670
ben62670 Posts: 15,969
edited December 2010 in For Sale (FS) Classifieds
I just bought a $hit load of these transistors. I know they fit Adcom GFA-585's for sure, and I think many more. Let me know if you need some. I will be beta matching these to sell as sets.
Thanks Ben

Pics added

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Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
Thanks
Ben
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  • heiney9
    heiney9 Posts: 25,447
    edited January 2008
    ben62670 wrote: »
    I just bought a $hit load of these transistors. I know they fit Adcom GFA-585's for sure, and I think many more. Let me know if you need some. I will be beta matching these to sell as sets.
    Thanks Ben

    I assume these are equivalents to the originals since they have long been out of production. The last supply (of originals) on earth were bought up by Adcom many years ago.

    I had/have been following your saga over at DIYAudio and I assume these were the equivalents (model #) given to you by Anatech, K-amps, Echo Wars and others as suitable replacements? :)

    How much for a closely matched pair/set?

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Puritan Audio PSM136 Pwr Condtioner & Classic PC's | Legend L600 | Roon Nucleus 1 w/LPS - Tubes add soul!
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  • heiney9
    heiney9 Posts: 25,447
    edited January 2008
    Are these in T03 type cases?
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Puritan Audio PSM136 Pwr Condtioner & Classic PC's | Legend L600 | Roon Nucleus 1 w/LPS - Tubes add soul!
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  • ben62670
    ben62670 Posts: 15,969
    edited January 2008
    They are the originals that came from an Adcom service center that went out of buisiness. I happened onto a whole bunch of them. I have spoken with Chris, and I am hooking him up with some for all the help that he has provided me. He is definetely a great guy. They are the factory sealed Toshiba 2SD424 & 2SB554 transistors:D:D:D With mounting screws, and insulators:D:D:D
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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  • heiney9
    heiney9 Posts: 25,447
    edited January 2008
    ben62670 wrote: »
    They are the originals that came from an Adcom service center that went out of buisiness. I happened onto a whole bunch of them. I have spoken with Chris, and I am hooking him up with some for all the help that he has provided me. He is definetely a great guy. They are the factory sealed Toshiba 2SD424 & 2SB554 transistors:D:D:D With mounting screws, and insulators:D:D:D

    Not to thread jack, but yes he (Chris) is and if he wasn't in Canada I would have sent him my Adcoms to be refreshed and checked out without hesitation. But, the duty and postage and the opportunity for damage is far to great.

    Are they in T03 type metal cans? Hold onto to some for me as I need to check my Adcoms and see what they take. I wasn't aware there would ever be a chance to happen upon the originals. Never hurts to have some spares :D:D

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Puritan Audio PSM136 Pwr Condtioner & Classic PC's | Legend L600 | Roon Nucleus 1 w/LPS - Tubes add soul!
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  • ben62670
    ben62670 Posts: 15,969
    edited January 2008
    heiney9 wrote: »
    Not to thread jack, but yes he (Chris) is and if he wasn't in Canada I would have sent him my Adcoms to be refreshed and checked out without hesitation. But, the duty and postage and the opportunity for damage is far to great.

    Are they in T03 type metal cans? Hold onto to some for me as I need to check my Adcoms and see what they take. I wasn't aware there would ever be a chance to happen upon the originals. Never hurts to have some spares :D:D

    H9

    No problem. They are the metal cans:) I have lots of them:D, and yes if Chris was here he would have had my GFA-585 too:)

    I think Parasound used these too.
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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  • engtaz
    engtaz Posts: 7,669
    edited January 2008
    How about the 555II. do they work in them????

    engtaz
    engtaz

    I love how music can brighten up a bad day.
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  • polrbehr
    polrbehr Posts: 2,842
    edited January 2008
    engtaz wrote: »
    How about the 555II. do they work in them????

    engtaz

    What about the GFA555 (your old one)?
    Would these be of any use to me?
    Just wondering.
    So, are you willing to put forth a little effort or are you happy sitting in your skeptical poo pile?


    http://audiomilitia.proboards.com/
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  • ben62670
    ben62670 Posts: 15,969
    edited January 2008
    You guys need to open up your amps, and look. I am pretty sure they do.

    Thanks
    Ben
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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  • heiney9
    heiney9 Posts: 25,447
    edited January 2008
    Ben, at this point I have to pass as my Adcoms don't use a T03 type trannies. If these fit the 585 I'm guessing they will also fit the 565 mono's an perhaps the 5800. Beyond that I'm not sure they are compatible with the 555 or 555II. I know they won't fit the 545 or 545II or 535 or 535II and the rest of the later models 5xxx all use MosFets.
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Puritan Audio PSM136 Pwr Condtioner & Classic PC's | Legend L600 | Roon Nucleus 1 w/LPS - Tubes add soul!
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  • heiney9
    heiney9 Posts: 25,447
    edited January 2008
    In nekkid photo's I have of Adcom 555 and 555II it does appear the 555 and 555II use a T03 style tranny. Can't make out the # so someone will have to physically look in their unit or see the schematic.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Puritan Audio PSM136 Pwr Condtioner & Classic PC's | Legend L600 | Roon Nucleus 1 w/LPS - Tubes add soul!
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  • heiney9
    heiney9 Posts: 25,447
    edited January 2008
    Maybe this will be helpful. A schematic and parts list for the Adcom 555
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Puritan Audio PSM136 Pwr Condtioner & Classic PC's | Legend L600 | Roon Nucleus 1 w/LPS - Tubes add soul!
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  • SLOCOOKN
    SLOCOOKN Posts: 704
    edited January 2008
    I emailed Adcom to find out what models use the transistors. I will let you know how they respond.
    :eek: From the bottom it looks like a steep incline, From the top another down hill slope of mine.:mad: But I know the equilibrium's there!:cool: .."Faith No More" :D
    Sony cx985v (for now)
    BBE 482i
    B&K AVP 1030
    Adcom GFA 555 mk 2
    AudioQuest Crystal 2 spk wire
    Nordost RCA
    SDA 3.1 tl RD0 tweets
    Belkin pf60
    Carver TFM 55x
    Signal Analog 2 RCA
    AudioQuestType 4
    VMPS Original Tall Boy (Mega Woofers soon)
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  • ben62670
    ben62670 Posts: 15,969
    edited January 2008
    heiney9 wrote: »
    Maybe this will be helpful. A schematic and parts list for the Adcom 555

    Thanks. That confirms the 555 uses the same output transistors.

    Ben
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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  • SLOCOOKN
    SLOCOOKN Posts: 704
    edited January 2008
    Hi Stephen,

    I can't really answer that question. I don't have a reverse parts to
    product look up.
    I do know the GFA-555 and GFA-555 II uses them. I have never heard a
    question like that! Why do you ask?



    Best Regards,

    Stan Brown
    Adcom Sales Engineer


    ADCOM LLC
    8541 E. Anderson Dr.
    Suite 101
    Scottsdale, AZ 85255
    Direct: 480-889-3112
    Company: 480-607-2277
    Cell: 480-907-9336
    FAX: 480-348-9876
    Email: sbrown@adcom.com
    :eek: From the bottom it looks like a steep incline, From the top another down hill slope of mine.:mad: But I know the equilibrium's there!:cool: .."Faith No More" :D
    Sony cx985v (for now)
    BBE 482i
    B&K AVP 1030
    Adcom GFA 555 mk 2
    AudioQuest Crystal 2 spk wire
    Nordost RCA
    SDA 3.1 tl RD0 tweets
    Belkin pf60
    Carver TFM 55x
    Signal Analog 2 RCA
    AudioQuestType 4
    VMPS Original Tall Boy (Mega Woofers soon)
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  • heiney9
    heiney9 Posts: 25,447
    edited January 2008
    Ben, I would also assume if your 585 uses them then the 565's would as well since they are essentially the mono version of the 585 design. The 5800 probably uses them as well. As shown in the schematic and parts list I posted for the 555 it seems they were interchangeable with another part # too.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Puritan Audio PSM136 Pwr Condtioner & Classic PC's | Legend L600 | Roon Nucleus 1 w/LPS - Tubes add soul!
    · Share on FacebookShare on Twitter
  • heiney9
    heiney9 Posts: 25,447
    edited January 2008
    SLOCOOKN wrote: »
    Hi Stephen,

    I can't really answer that question. I don't have a reverse parts to
    product look up.
    I do know the GFA-555 and GFA-555 II uses them. I have never heard a
    question like that! Why do you ask?



    Best Regards,

    Stan Brown
    Adcom Sales Engineer


    ADCOM LLC
    8541 E. Anderson Dr.
    Suite 101
    Scottsdale, AZ 85255
    Direct: 480-889-3112
    Company: 480-607-2277
    Cell: 480-907-9336
    FAX: 480-348-9876
    Email: sbrown@adcom.com

    Strange, as the parts list and schematic I posted for the 555 comes from the service manual. Certainly they have a service manual lying around somewhere:confused:
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Puritan Audio PSM136 Pwr Condtioner & Classic PC's | Legend L600 | Roon Nucleus 1 w/LPS - Tubes add soul!
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  • polrbehr
    polrbehr Posts: 2,842
    edited January 2008
    heiney9 wrote: »
    Maybe this will be helpful. A schematic and parts list for the Adcom 555

    Thanks for posting this H9.
    So, are you willing to put forth a little effort or are you happy sitting in your skeptical poo pile?


    http://audiomilitia.proboards.com/
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  • Lowell_M
    Lowell_M Posts: 1,660
    edited January 2008
    Pardon my ignorance but, What is the significance of this thread? Are these transistors an upgrade? Or are they just good to have on hand if you need them?
    HT
    RTi70 mains
    CSi30 center
    RTi28 Rears
    Velodyne CHT-12
    H/K AVR-247
    ADCOM GFA-7000
    Samsung PN58B860
    Playstation 3
    2-Channel
    Polk Audio LSi15's
    Rotel RCD-1072
    Nakamichi CA-5 Pre
    ADCOM GFA-555
    Signal Cable Analog II IC's
    Signal Ultra Bi-Wire Speaker Cables
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  • heiney9
    heiney9 Posts: 25,447
    edited January 2008
    a_mattison wrote: »
    Pardon my ignorance but, What is the significance of this thread? Are these transistors an upgrade? Or are they just good to have on hand if you need them?

    Good to have on hand as a matched set if you need them. Unless you do something really stupid tranny's usually don't fail. The problem is these ORIGINAL Toshiba's have been discontinued for years. In the Adcom design, and any design worth it's salt, the tranny's are very carefully matched to each other in order to keep things sounding good (linear).

    Getting matched sets of the same type and from the same general run is always the best way to go. Many times even if (1) tranny is blown they are replaced as pairs or the entire channel.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Puritan Audio PSM136 Pwr Condtioner & Classic PC's | Legend L600 | Roon Nucleus 1 w/LPS - Tubes add soul!
    · Share on FacebookShare on Twitter
  • Lowell_M
    Lowell_M Posts: 1,660
    edited January 2008
    heiney9 wrote: »
    Good to have on hand as a matched set if you need them. Unless you do something really stupid tranny's usually don't fail. The problem is these ORIGINAL Toshiba's have been discontinued for years. In the Adcom design, and any design worth it's salt, the tranny's are very carefully matched to each other in order to keep things sounding good (linear).

    Getting matched sets of the same type and from the same general run is always the best way to go. Many times even if (1) tranny is blown they are replaced as pairs or the entire channel.

    H9

    Cool. I try to stay away from doing really stupid things. Thanks Brock!
    HT
    RTi70 mains
    CSi30 center
    RTi28 Rears
    Velodyne CHT-12
    H/K AVR-247
    ADCOM GFA-7000
    Samsung PN58B860
    Playstation 3
    2-Channel
    Polk Audio LSi15's
    Rotel RCD-1072
    Nakamichi CA-5 Pre
    ADCOM GFA-555
    Signal Cable Analog II IC's
    Signal Ultra Bi-Wire Speaker Cables
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  • heiney9
    heiney9 Posts: 25,447
    edited January 2008
    a_mattison wrote: »
    Cool. I try to stay away from doing really stupid things. Thanks Brock!

    #1 stupid thing is allowing the speaker cables to touch each other when the amp is powered up. Sometimes it just blows the fuse and other times it takes out the fuse and some tranny's. As long as one is absolutely careful when doing things like that.

    #2 thing is a lightening strike which takes components out. Either have a heavy duty surge protector or do as I do when it calls for storms or is storming I unplug everything. :)
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Puritan Audio PSM136 Pwr Condtioner & Classic PC's | Legend L600 | Roon Nucleus 1 w/LPS - Tubes add soul!
    · Share on FacebookShare on Twitter
  • ben62670
    ben62670 Posts: 15,969
    edited January 2008
    a_mattison wrote: »
    Cool. I try to stay away from doing really stupid things. Thanks Brock!

    Yeah like letting your speaker terminals touch each other because you didn't power down your amp, or hook up your custom SDA Blade blade the wrong way:o
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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  • ben62670
    ben62670 Posts: 15,969
    edited January 2008
    heiney9 wrote: »
    #1 stupid thing is allowing the speaker cables to touch each other when the amp is powered up. Sometimes it just blows the fuse and other times it takes out the fuse and some tranny's. As long as one is absolutely careful when doing things like that.

    #2 thing is a lightening strike which takes components out. Either have a heavy duty surge protector or do as I do when it calls for storms or is storming I unplug everything. :)

    You have cables on their way:D
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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  • ben62670
    ben62670 Posts: 15,969
    edited January 2008
    heiney9 wrote: »
    Getting matched sets of the same type and from the same general run is always the best way to go. Many times even if (1) tranny is blown they are replaced as pairs or the entire channel.

    H9

    On my 585 I have to replace the whole string of them with beta matched transistors. 5 each to replace one blown. So I blew one on one channel, and one on the other. So I shall be replacing 10 transistors:( Luckily our friend Chris (you know who I am talking about) is helping me with the beta matching, and I am going to give him a donation for all he has done:) Excellent Man he is.

    Ben
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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  • heiney9
    heiney9 Posts: 25,447
    edited January 2008
    ben62670 wrote: »
    You have cables on their way:D

    Cool can't wait. I'm finally over my cold/head sinus congestion and can hear almost normal again. You can bet these will be demo'd/used at our next area Polk gathering which should be coming up soon (sorry for the slight derail)
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Puritan Audio PSM136 Pwr Condtioner & Classic PC's | Legend L600 | Roon Nucleus 1 w/LPS - Tubes add soul!
    · Share on FacebookShare on Twitter
  • ben62670
    ben62670 Posts: 15,969
    edited January 2008
    heiney9 wrote: »
    Cool can't wait. I'm finally over my cold/head sinus congestion and can hear almost normal again. You can bet these will be demo'd/used at our next area Polk gathering which should be coming up soon (sorry for the slight derail)

    Burn these suckers in!
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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  • engtaz
    engtaz Posts: 7,669
    edited January 2008
    You guy forgot to about the dreaded monoing of 555 to SDA's!!!:eek:

    engtaz
    engtaz

    I love how music can brighten up a bad day.
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  • heiney9
    heiney9 Posts: 25,447
    edited January 2008
    engtaz wrote: »
    You guy forgot to about the dreaded monoing of 555 to SDA's!!!:eek:

    engtaz

    Well, yes Engtaz that is another situation where you would need some spare tranny's :eek::D. I take it you got your 555's fixed properly.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Puritan Audio PSM136 Pwr Condtioner & Classic PC's | Legend L600 | Roon Nucleus 1 w/LPS - Tubes add soul!
    · Share on FacebookShare on Twitter
  • fredv
    fredv Posts: 923
    edited January 2008
    Hi Ben,

    How much is a set of transistors for one channel of the GFA-555, i.e. 4 of each type?

    Thanks,

    -fredv-
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  • ben62670
    ben62670 Posts: 15,969
    edited January 2008
    fredv wrote: »
    Hi Ben,

    How much is a set of transistors for one channel of the GFA-555, i.e. 4 of each type?

    Thanks,

    Hey Fred. I'll take care of you. You have my email. Also I have to match these for you correct? Or are they pre matched from Toshiba?

    Thanks
    Ben
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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