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3rd September 2010, 09:35 PM
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#1 |
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diyAudio Member
Join Date: Feb 2004
Location: Recife - Brasil Northeast
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Introducing you Mitchel's minimalist Préamplifier
I have bougth a kit.... from Miguel Nabuco (120 USD)... will assemble soon to test...he is called Mitchel in this forum.
He was the man that produced boards and layouts and eagle files to the Dx Blame Brazilian group buy...i feel gratitude to him, reason why i am showing his work. Nabuco Eletrônica - Kits de Áudio Hi-Fi Maybe you gonna need to remove the ending br, there you gonna find a pdf with schematic to DIY, also boards pictures and explanations.... in portuguese. YouTube - Nabuco Pre amplifier 1 YouTube - Nabuco Pré Amplifier - Part 2A YouTube - Nabuco Pré amplifier - Part 2B YouTube - Nabuco Pre amplifier 3 YouTube - Nabuco Pré Amplifier 4 YouTube - Nabuco Pré Amplifier 5 YouTube - Nabuco Pré amplifier 6 regards, Carlos
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Try to build an amplifier folks ... it is pure adrenaline! |
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5th September 2010, 09:03 PM
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#2 |
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diyAudio Member
Join Date: Feb 2004
Location: Recife - Brasil Northeast
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Here one of his pages
__________________
Try to build an amplifier folks ... it is pure adrenaline! |
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25th September 2010, 09:10 AM
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#3 |
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diyAudio Member
Join Date: Feb 2004
Location: Recife - Brasil Northeast
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I am starting to assemble
Dip swithes controls the chip gain....there's an input potentiometer too and more two boards...supply and input selector using micro relays and routating panel switch.
regards, Carlos
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Try to build an amplifier folks ... it is pure adrenaline! Last edited by destroyer X; 25th September 2010 at 09:12 AM. |
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26th September 2010, 04:06 AM
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#5 |
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diyAudio Member
Join Date: Feb 2004
Location: Recife - Brasil Northeast
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When finished i will inform what i think about
It is very interesting because we can test several Op Amps... this is very nice, as provides knowledge and hours of enjoyment observing the sonic signature of each one of them.
regards, Carlos
__________________
Try to build an amplifier folks ... it is pure adrenaline! |
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26th September 2010, 11:03 AM
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#6 |
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diyAudio Member
Join Date: Feb 2004
Location: Recife - Brasil Northeast
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Take a look about our options and the output main characteristic
Interesting chart made by Jeon Seob Shin.
regards, Carlos
__________________
Try to build an amplifier folks ... it is pure adrenaline! |
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28th September 2010, 10:54 AM
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#7 |
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diyAudio Member
Join Date: Feb 2004
Location: Recife - Brasil Northeast
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I have assembled, the input identification leds will be substituted by a smaller ones
Volume potentiometer and also sensitivity switch does not appear in the picture.
regards, Carlos
__________________
Try to build an amplifier folks ... it is pure adrenaline! |
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4th December 2010, 05:55 AM
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#8 |
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diyAudio Member
Join Date: Aug 2009
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It's an interesting kit!, how i can pay you the preamplifier? (Could be Paypal?) I'm from Argentina. How do you send the kit?
A few more days I could pay via paypal, i haven't got international credit card yet., so I've to wait... |
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4th December 2010, 01:07 PM
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#9 |
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diyAudio Member
Join Date: Feb 2004
Location: Recife - Brasil Northeast
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Goto Miguel Nabuco, he is Mitchel in this forum
He has paypall and can send to you i am sure...he has case too....it is DIY..you assemble.
He is the one is running the group buy to the Dx Blame ST Watch here: Nabuco Eletrônica - Kits de Áudio Hi-Fi His personnal email is: miguelnabuco@terra.com.br regards, Carlos
__________________
Try to build an amplifier folks ... it is pure adrenaline! |
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4th December 2010, 01:21 PM
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#10 |
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diyAudio Member
Join Date: Feb 2008
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dear sir
greetings are you using ic OPA2134 FROM BURR BROWN can studio preamplifier from silicon chip australia be used with amplifier it is a very high end preamplifier have finished supply pcb for your lovely amplifier has delay dc protector short circuit protection clip led all on one pcb is it okay i have transformer 40 0 40 ac 6 amperes thanking you andrew lebon |
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