Hi Nick, thank you so much!!
I think I’ve got a much better understanding than before.
Saw this discussion on DIYaudio as well https://www.diyaudio.com/forums/power-s ... upply.html
Cheers
Search found 11 matches
- Sun Aug 30, 2020 9:04 am
- Forum: Solid State
- Topic: DIY Transistor Amp Using NVA Boards
- Replies: 435
- Views: 185969
- Fri Aug 28, 2020 4:05 pm
- Forum: Solid State
- Topic: DIY Transistor Amp Using NVA Boards
- Replies: 435
- Views: 185969
Re: DIY Transistor Amp Using NVA Boards
Thank you Nick, learn something new again.
You mentioned about drawing 100mA, but for driving the output stage would it be too low?
If I am not wrong NVA's quiescent current is approx 500~700mA.
Thanks.
You mentioned about drawing 100mA, but for driving the output stage would it be too low?
If I am not wrong NVA's quiescent current is approx 500~700mA.
Thanks.
- Fri Aug 28, 2020 5:40 am
- Forum: Solid State
- Topic: DIY Transistor Amp Using NVA Boards
- Replies: 435
- Views: 185969
Re: DIY Transistor Amp Using NVA Boards
Thanks Nick, but pardon my ignorance, is the resistor parallel to ground at C or is it in series from C to output?
- Thu Aug 27, 2020 4:25 pm
- Forum: Solid State
- Topic: DIY Transistor Amp Using NVA Boards
- Replies: 435
- Views: 185969
Re: DIY Transistor Amp Using NVA Boards
Thank you Nick, but where do I place the 240R resistor? After the L and before the C?
- Thu Aug 27, 2020 1:57 pm
- Forum: Solid State
- Topic: DIY Transistor Amp Using NVA Boards
- Replies: 435
- Views: 185969
- Thu Aug 27, 2020 11:07 am
- Forum: Solid State
- Topic: DIY Transistor Amp Using NVA Boards
- Replies: 435
- Views: 185969
Re: DIY Transistor Amp Using NVA Boards
If you are using choke input make sure you are pulling enough current for your choke inductance. Hi Nick, I read about the need to have enough current for the LC filter to work, but I’m not sure what I need to do to ensure that. My plan is to have 30H/10Amp choke, followed by 2x10,000uF for each ra...
- Wed Aug 26, 2020 1:41 pm
- Forum: Solid State
- Topic: DIY Transistor Amp Using NVA Boards
- Replies: 435
- Views: 185969
Re: DIY Transistor Amp Using NVA Boards
Thank you Stu, Nick and Rowuk for your input. Power supply will be my first priority and will try out both regulated and unregulated power supply for the input stage, output stage will be fed with unregulated ones. We agree that Richard had designed the circuit so well, which is why we (NVA fans) lo...
- Sun Aug 23, 2020 5:00 pm
- Forum: Solid State
- Topic: DIY Transistor Amp Using NVA Boards
- Replies: 435
- Views: 185969
Re: DIY Transistor Amp Using NVA Boards
Hi Stu, For the regulators, I am looking at one of those from Teddy Pardo or this one (https://diyaudiostore.com/products/super-regulator). I'm planning to use LCC after rectifiers, the L before C would not give the peak voltage of 50vdc but around 90% of it so I'm having around 44vdc on my paper fo...
- Sun Aug 23, 2020 10:11 am
- Forum: Solid State
- Topic: DIY Transistor Amp Using NVA Boards
- Replies: 435
- Views: 185969
Re: DIY Transistor Amp Using NVA Boards
Thank you Karatestu for the very useful information and sharing you experience. Yes, 47kohm input impedance would be ok for the Lightspeed but while the circuit for LDR volume control is simple, finding 2 matching pairs of LDR will be challenging for me, there is no kits available and I can only fin...
- Tue Aug 18, 2020 7:26 am
- Forum: Solid State
- Topic: DIY Transistor Amp Using NVA Boards
- Replies: 435
- Views: 185969
Re: DIY Transistor Amp Using NVA Boards
Just a thought....... I can see that the A80 runs on 2 separate power supplies for the input and output stages. I’ve read the write up about PSU on TNT-audio and seems like a regulated power supply for the input stage would benefit greatly while the output stage should be running on unregulated one....
- Wed Jun 17, 2020 10:56 am
- Forum: Solid State
- Topic: DIY Transistor Amp Using NVA Boards
- Replies: 435
- Views: 185969
Re: DIY Transistor Amp Using NVA Boards
Hi Everyone, I’ve been reading this for recently and have joined this forum 2 days ago. Seeing this project getting on well gives me a lot of confidence in modifying my old A60 into something better. My plan is to use 100W transformer for each input stage and 250W transformer for each output stage. ...