Building a DIY amp with NVA amplifier boards

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Firebug1
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Re: Building a DIY amp with NVA amplifier boards

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Images shown nicely. I hope you have a good fire insurance... :mrgreen: :guiness;
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karatestu
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Re: Building a DIY amp with NVA amplifier boards

Unread post by karatestu »

Firebug1 wrote: Fri Jan 17, 2020 6:37 pm Images shown nicely. I hope you have a good fire insurance... :mrgreen: :guiness;
I always have an open can of lager handy :grin:
DIY inspired by Richard "The Doc" Dunn RIP

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Re: Building a DIY amp with NVA amplifier boards

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karatestu wrote: Fri Jan 17, 2020 7:24 pm
Firebug1 wrote: Fri Jan 17, 2020 6:37 pm Images shown nicely. I hope you have a good fire insurance... :mrgreen: :guiness;
I always have an open can of lager handy :grin:
well, that should do it 😁
Rega by Michael Lim\Teac\NVA\
SA Mantra30\Audio Technica ATH-A900X
...the Gods you worship are steel, at the altar of rock 'n' roll you kneel...

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karatestu
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Re: Building a DIY amp with NVA amplifier boards

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CN211276 wrote: Fri Jan 17, 2020 5:51 pm The images are not showing.
Are they showing now CN ?
DIY inspired by Richard "The Doc" Dunn RIP

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Re: Building a DIY amp with NVA amplifier boards

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karatestu wrote: Sun Jan 19, 2020 9:11 am
CN211276 wrote: Fri Jan 17, 2020 5:51 pm The images are not showing.
Are they showing now CN ?
Very clearly.
System DC Blocker, NVA BMU, Cisco 2960G, NA Eno, Sonore MicroRendu/MCRU PS, AQ JB, ifi iPurifier 3, Chord Mscaler, Chord Qutest/MCRU PS, NVA P90SA Mk2, NVA A80s Mk3, NVA Cube 1s, NVA TSCS, NVA TIS, DH Labs Mirage USB/Silver Sonic BNC, Cat 8 ethernet.
HP Grado SR 325e, Chord Mojo, AQ Carbon.
Analogue Rega Planar 3, Denon DL-110, NVA Phono 1.
Second System Topping E30, NVA P20, NVA A20, NVA Cubettes, NVA LS3, NVA, NVA SSP, SSC, AQ Carbon.
Out Beyerdynamic Avenha, AQ DF Red.

RIP Doc

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karatestu
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Re: Building a DIY amp with NVA amplifier boards

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CN211276 wrote: Sun Jan 19, 2020 9:36 am
karatestu wrote: Sun Jan 19, 2020 9:11 am
CN211276 wrote: Fri Jan 17, 2020 5:51 pm The images are not showing.
Are they showing now CN ?
Very clearly.
Thanks for the feedback. I didn't do anything :lol: :think: :think: :think:

Not sure why that happened.
DIY inspired by Richard "The Doc" Dunn RIP

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Re: Building a DIY amp with NVA amplifier boards

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karatestu wrote: Sun Jan 19, 2020 9:58 am
CN211276 wrote: Sun Jan 19, 2020 9:36 am
karatestu wrote: Sun Jan 19, 2020 9:11 am

Are they showing now CN ?
Very clearly.
Thanks for the feedback. I didn't do anything :lol: :think: :think: :think:

Not sure why that happened.
I had just set up my new router/hub. Might be connected although it worked ok from the off.
System DC Blocker, NVA BMU, Cisco 2960G, NA Eno, Sonore MicroRendu/MCRU PS, AQ JB, ifi iPurifier 3, Chord Mscaler, Chord Qutest/MCRU PS, NVA P90SA Mk2, NVA A80s Mk3, NVA Cube 1s, NVA TSCS, NVA TIS, DH Labs Mirage USB/Silver Sonic BNC, Cat 8 ethernet.
HP Grado SR 325e, Chord Mojo, AQ Carbon.
Analogue Rega Planar 3, Denon DL-110, NVA Phono 1.
Second System Topping E30, NVA P20, NVA A20, NVA Cubettes, NVA LS3, NVA, NVA SSP, SSC, AQ Carbon.
Out Beyerdynamic Avenha, AQ DF Red.

RIP Doc

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Re: Building a DIY amp with NVA amplifier boards

Unread post by karatestu »

Some progress made here although no pictures to show you.

These last two amps are an exercise in using up parts i have to hand. Four transformers of lower voltage and VA than my other four. The caps are all kendeil i got from Les at Avondale a few years ago. For the rectifier diodes i am using dual schottky MBR20200CT. As i don't have a bridge rectifier to bolt to the heat sink then i have had to make two boards for the two output stages from tufnol and hard wire the circuit using tinned 2 mm solid copper wire on the other side of the board to the components.

Three 6,800 uf caps in parallel per polarity with no inductor's between the caps like i have on the input stages. I have had all four psu's powered up separately and they all do what they should be doing. I will link their 0V next and observe again before hooking up to my spare Avondale amp boards. Then if all is ok i will wire in the NVA boards and hope for the best :grin:
DIY inspired by Richard "The Doc" Dunn RIP

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karatestu
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Re: Building a DIY amp with NVA amplifier boards

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Bit more progress here.

My third pair of nva based monoblocs are coming along nicely. Will soon have that six pack i have always promised myself :guiness; Not built in cases (as is the way at the moment) and built using odds and ends of wire that i had lying around - not the proper colour scheme and all different gauges :roll: It will do for these experimental stages .

I tested the nva boards on a single supply at first and when i knew all was good i hooked up the second psu's. Went without a hitch and it is sat at the moment powered up with no load.

No signal wiring yet but i will do that shortly :dance:
DIY inspired by Richard "The Doc" Dunn RIP

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karatestu
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Re: Building a DIY amp with NVA amplifier boards

Unread post by karatestu »

When these are done and ready to go they are going on the tweeters. I don't have any spare nva cable so i am going to have to use Naim naca5 which is the only cable i have with very low capacitance. That will have to do for now :roll: until i know it is worth doing then Paul can expect an order in the not too distant future :guiness;
DIY inspired by Richard "The Doc" Dunn RIP

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