I've got three pairs
Building a DIY amp with NVA amplifier boards
- karatestu
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- SteveTheShadow
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Re: Building a DIY amp with NVA amplifier boards
I had two pairs. Then I blew one of the pairs up
Somebody’s telling me the latest scandals.
Somebody’s stepping on my plastic sandals. Joe Jackson (1979)
Somebody’s stepping on my plastic sandals. Joe Jackson (1979)
- karatestu
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Re: Building a DIY amp with NVA amplifier boards
DIY FREE ZONE
- Latteman
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Re: Building a DIY amp with NVA amplifier boards
Are the components on the boards ‘basically the same’ between amps and it’s the power supply that is the big difference.
How is an A20 different to the A30?
How is an A20 different to the A30?
Analogue Source -
Denon DP47f; AT-VM95SH- RigB 9
GL-59; ARB uni pivot; AT- Signet mc
Nva phono mm/mc
Doug Self balanced Pre amp
Akai 4000DS mk2 R2R
Digital Sources- Argon Pi4 v2; IfI iUSB 3.0, Ifi Neo idsd Dac;
Tidal / Radio Paradise
Amplification Nva 300va mono blocks
Speakers Lii Audio F-15 in Open Baffle; Ls6
Weiduka AC8.8- for digital sources
Mini BMU for analog sources
Denon DP47f; AT-VM95SH- RigB 9
GL-59; ARB uni pivot; AT- Signet mc
Nva phono mm/mc
Doug Self balanced Pre amp
Akai 4000DS mk2 R2R
Digital Sources- Argon Pi4 v2; IfI iUSB 3.0, Ifi Neo idsd Dac;
Tidal / Radio Paradise
Amplification Nva 300va mono blocks
Speakers Lii Audio F-15 in Open Baffle; Ls6
Weiduka AC8.8- for digital sources
Mini BMU for analog sources
- karatestu
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Re: Building a DIY amp with NVA amplifier boards
Boards are exactly the same.
Difference is bigger VA transformer and possibly higher voltage.
Difference is bigger VA transformer and possibly higher voltage.
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- Latteman
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Re: Building a DIY amp with NVA amplifier boards
Interesting, thanks. As u know -my spares- I might be tempted to dabble
Analogue Source -
Denon DP47f; AT-VM95SH- RigB 9
GL-59; ARB uni pivot; AT- Signet mc
Nva phono mm/mc
Doug Self balanced Pre amp
Akai 4000DS mk2 R2R
Digital Sources- Argon Pi4 v2; IfI iUSB 3.0, Ifi Neo idsd Dac;
Tidal / Radio Paradise
Amplification Nva 300va mono blocks
Speakers Lii Audio F-15 in Open Baffle; Ls6
Weiduka AC8.8- for digital sources
Mini BMU for analog sources
Denon DP47f; AT-VM95SH- RigB 9
GL-59; ARB uni pivot; AT- Signet mc
Nva phono mm/mc
Doug Self balanced Pre amp
Akai 4000DS mk2 R2R
Digital Sources- Argon Pi4 v2; IfI iUSB 3.0, Ifi Neo idsd Dac;
Tidal / Radio Paradise
Amplification Nva 300va mono blocks
Speakers Lii Audio F-15 in Open Baffle; Ls6
Weiduka AC8.8- for digital sources
Mini BMU for analog sources
- karatestu
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Re: Building a DIY amp with NVA amplifier boards
I like frame (EI) transformers and have tried them on nva boards. I liked it a lot but my EI transformers are small compared to my Canterbury windings toroids and have lower voltage. Richard liked toroids better, said they made his amps sound "better". As usual not giving too much away
Might try it again for kicks
Might try it again for kicks
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- karatestu
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Re: Building a DIY amp with NVA amplifier boards
Here is the piece of aluminum sheet i will be using as heat sink for all 6 (probably) of my nva amplifier boards
It's a real monster - that metal ruler is a metre and it nearly gets to the end. Should be enough heat sucking ability for 6 amplifier boards.
It's 6mm thick you know
Stu
It's a real monster - that metal ruler is a metre and it nearly gets to the end. Should be enough heat sucking ability for 6 amplifier boards.
It's 6mm thick you know
Stu
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- karatestu
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Re: Building a DIY amp with NVA amplifier boards
T'other day i made some progress with the next four channels of nva based amplification.
It takes longer than you think just soldering in eight output transistors. Every transistor leg must be scratched with a knife blade to remove oxidisation, cleaned with alcohol, bent and inserted into the nva pcb. I use blutack to hold them in and press down to get them both level for when they are mounted on the aluminum sheet heat sink. When soldered i always remove the flux with alcohol and cotton wool bud.
Here they are lined up just to prove i have actually done it. Sorry it's been so long starting this Doc
It takes longer than you think just soldering in eight output transistors. Every transistor leg must be scratched with a knife blade to remove oxidisation, cleaned with alcohol, bent and inserted into the nva pcb. I use blutack to hold them in and press down to get them both level for when they are mounted on the aluminum sheet heat sink. When soldered i always remove the flux with alcohol and cotton wool bud.
Here they are lined up just to prove i have actually done it. Sorry it's been so long starting this Doc
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Re: Building a DIY amp with NVA amplifier boards
Stu.......you never cease to amaze me bud.
Not a clue what your on about, but hats off to ya anyway.
Enjoy.
Not a clue what your on about, but hats off to ya anyway.
Enjoy.