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Thread: Bigbottle MC Phonostage

  1. #201
    Join Date: Nov 2015

    Location: Wolverhampton

    Posts: 9,525
    I'm Oliver.

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    Quote Originally Posted by 337alant View Post
    Oliver
    Would this transformer be OK ?
    R26-90 165-0 0.1A, 2X9v 1A
    https://www.ebay.co.uk/itm/LITE-R26-...frcectupt=true

    Alan
    Hi Alan,

    Yes, I believe so. It was suggested by a couple of guys over on DIY. Just make sure it's not vibrating in the chassis!!
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 MK6 tonearm > Ortofon Kontrapunkt b > Bigbottle Jfet MC Valve Phonostage (Telefunken Valves)
    Digital: Raspberry Pi 3+/Allo Boss 1.2/Isolator 1.3 & Firebottle LPSU with Volumio & JRiver
    Amplification: Nelson Pass Derived DCB1 with Khozmo 48 Step Series Attenuator & Neurochrome Modulus 686 Amplifier
    Cables: SPOTFIRE Speaker Cable & SPOTFIRE IC Cables & SPOTFIRE Tonearm cable
    Speakers: Pioneer CS-77A

    Price List For SPOTFIRE Cables here:https://bit.ly/2Uxiv3j

    Alternative reading: http://www.audioaddictsforum.com

  2. #202
    Join Date: Aug 2012

    Location: Hartlepool UK

    Posts: 1,470
    I'm Alan.

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    OK thanks I have ordered one
    I have had good results with R cores in the past and I will mount it on a sound deadening sheet and bond the frame to the transformer if it is noisy

    Alan
    Turntable - Garrard 401/Jelco 750L/Ortofon Kontrapunkt B, Pioneer PLC 590, SME 3009/2 , Denon DL103R - DIY Paradise Phono stage - Reel 2 Reel Studer A810, Otari MX55,Tascam BR20 - Digital HTPC / Young Dac - Preamp - DIY B4, 821, Power Amp's DIY Voyager Mono Block, Speakers Tannoy precision 6.4 / Wilmslow Kit Volt BM220.8 / Scanspeak D2905/9500

  3. #203
    Join Date: Nov 2015

    Location: Wolverhampton

    Posts: 9,525
    I'm Oliver.

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    Quote Originally Posted by 337alant View Post
    OK thanks I have ordered one
    I have had good results with R cores in the past and I will mount it on a sound deadening sheet and bond the frame to the transformer if it is noisy

    Alan
    Ah, good plan,

    20 is a great price too!

    PCB will be in the post tomorrow.

    O
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 MK6 tonearm > Ortofon Kontrapunkt b > Bigbottle Jfet MC Valve Phonostage (Telefunken Valves)
    Digital: Raspberry Pi 3+/Allo Boss 1.2/Isolator 1.3 & Firebottle LPSU with Volumio & JRiver
    Amplification: Nelson Pass Derived DCB1 with Khozmo 48 Step Series Attenuator & Neurochrome Modulus 686 Amplifier
    Cables: SPOTFIRE Speaker Cable & SPOTFIRE IC Cables & SPOTFIRE Tonearm cable
    Speakers: Pioneer CS-77A

    Price List For SPOTFIRE Cables here:https://bit.ly/2Uxiv3j

    Alternative reading: http://www.audioaddictsforum.com

  4. #204
    Join Date: Jan 2014

    Location: Bristol

    Posts: 1,100
    I'm Nathan.

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    Good morning all.

    I've Nearly completed Oliver's Bigbottle build and will soon be ready to order the transformer. The rest of the parts have just arrived and will be fitted the weekend.
    Can anyone supply a link to the ones you have used please as I'm struggling a bit to find a suitable one as I'm a complete noob.
    Anyway here's a pic of where I am upto at the moment.


  5. #205
    Join Date: Nov 2015

    Location: Wolverhampton

    Posts: 9,525
    I'm Oliver.

    Default

    Quote Originally Posted by nuff View Post
    Good morning all.

    I've Nearly completed Oliver's Bigbottle build and will soon be ready to order the transformer. The rest of the parts have just arrived and will be fitted the weekend.
    Can anyone supply a link to the ones you have used please as I'm struggling a bit to find a suitable one as I'm a complete noob.
    Anyway here's a pic of where I am upto at the moment.

    Hi Nathan,

    Looks great! Did you get the revisions to the part values earlier in the thread? IIRC those green capacitors have been emitted and a couple of reisitor values have changed slightly to provide a more accurate riaa curve.

    There is a link to the Transformer DIY Audio which costs about 20

    I'll try and find the link later.
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 MK6 tonearm > Ortofon Kontrapunkt b > Bigbottle Jfet MC Valve Phonostage (Telefunken Valves)
    Digital: Raspberry Pi 3+/Allo Boss 1.2/Isolator 1.3 & Firebottle LPSU with Volumio & JRiver
    Amplification: Nelson Pass Derived DCB1 with Khozmo 48 Step Series Attenuator & Neurochrome Modulus 686 Amplifier
    Cables: SPOTFIRE Speaker Cable & SPOTFIRE IC Cables & SPOTFIRE Tonearm cable
    Speakers: Pioneer CS-77A

    Price List For SPOTFIRE Cables here:https://bit.ly/2Uxiv3j

    Alternative reading: http://www.audioaddictsforum.com

  6. #206
    Join Date: Jan 2014

    Location: Bristol

    Posts: 1,100
    I'm Nathan.

    Default

    Hi Oliver,
    Thanks for the reply.

    Yes I did see the revisions but thought I'd try getting this up and running first then make the changes at a later date.

    If you could find the link I'd appreciate it.

    Nathan.

  7. #207
    Join Date: Oct 2012

    Location: The Black Country

    Posts: 5,066
    I'm Alan.

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    At least take those green capacitors off before trial.

  8. #208
    Join Date: Jan 2014

    Location: Bristol

    Posts: 1,100
    I'm Nathan.

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    Quote Originally Posted by Firebottle View Post
    At least take those green capacitors off before trial.
    Ok Alan, Thanks. I'll remove them the weekend when i fit the rest.

    Cheers!!!

  9. #209
    Join Date: Jan 2014

    Location: Bristol

    Posts: 1,100
    I'm Nathan.

    Default

    Good morning all,

    Would the power supply in the link be suitable or is there another you would recommend.

    https://www.ebay.co.uk/itm/192498606...torefresh=true

  10. #210
    Join Date: Oct 2012

    Location: The Black Country

    Posts: 5,066
    I'm Alan.

    Default

    Yes that transformer is suitable, I have used the same one myself.

    However there is a caveat. The tx isn't a toroid so the magnetic field is greater, unless you shield it very effectively or have a large case so it can be positioned far from the MC inputs you may have problems with induced hum.
    Also with the construction a lot of these examples have a low mechanical hum/buzz to them. If you want silence then look elsewhere.

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