6-channel class-B(AB) amplifier with Linkwitz-Riley crossover and protection circuit on MOSFET relays.
Attachments
Аmplifier project Fury Оne.
peculiarities:
*Jfet at the input of the amplifier
*one gain stage,
*progressive correction
*ultra-linear gain open loop
*separate power supply by channels
P.S.
This project will be used as an industrial product, because became the winner in test auditions. Now there is a pre-production.
The board with this amplifier will be installed in active acoustics
peculiarities:
*Jfet at the input of the amplifier
*one gain stage,
*progressive correction
*ultra-linear gain open loop
*separate power supply by channels
P.S.
This project will be used as an industrial product, because became the winner in test auditions. Now there is a pre-production.
The board with this amplifier will be installed in active acoustics
Attachments
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Project Fury Three.
3 amplifiers have already been assembled, there is a photo of only two.
the peculiarity of this amplifier in a large ultra-linear gain of the input stage is 77dB (without NFB), the remaining 36dB is carried out by the driver stage, the output stage is on powerful vertical mosfets. also progressive correction.
3 amplifiers have already been assembled, there is a photo of only two.
the peculiarity of this amplifier in a large ultra-linear gain of the input stage is 77dB (without NFB), the remaining 36dB is carried out by the driver stage, the output stage is on powerful vertical mosfets. also progressive correction.
Attachments
Avec quoi l'avez vous comparé et il était vainqueur en audition ? Si je comprends bien tout ce qui sonne bien devient industriel,le reste pour le diy...
Electrical engineering in its finest form ... It seems almost like the magic ...
can you upload your other projects? maybe we can get inspiration how to make our projects as neat as yours. thanks
Hiraga 8W
The sound is very clear and precise. 😁
The sound is very clear and precise. 😁
Thank you, sipulannas! I think I peaked with the preamp. I had experience, good eyes and hands back then. At the risk of ruining my reputation 🙂, I'm attaching pictures of my second power amp project. It's from 1992. I used it continuously until this year. Please forgive the B&W front and rear panel shots. These are from color film back in the day and they did not respond well to my Lightroom/Photoshop efforts to restore them. The top internal shot is recent digital.
Bruce
Holy moy! its still awesome Bruce! How you did it especially those chassis, did you mill it or using CNC ( i think CNC not easily available back then)? Sometime reading DIY community make me think, how awesome and enchanting human are. What amp in those beautiful chassis?
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Thank you! No, the only tools that I had were a table saw, small drill press, and hand tools (hack and coping saws, files). The panels were cut from aluminum sheet stock (1/16, 1/8, 1/4, 3/8 inches thick) on the table saw with a special carbide blade. I used 1/8" thick aluminum angle stock (also cut on the saw) with press nuts to attach the panels together. The heatsinks (4 per side) that I got from a surplus store had to be cut to the right length and width. This was also done on the table saw and cleaned up with a joiner sanding disk on the saw. The hardest task was cutting rectangular holes in the 1/8" panels. There are 4 large ones on each side that you cannot see in the photos. This required a lot of hand strength and patience. An end mill would have made it so much easier.
It is a stereo amplifier that outputs 125 W into 8 ohms, 200 W into 4 ohms both channels driven, and 400 W into 2 ohms with one channel driven.
I like amps that achieve the required gain and drive capability by the least (as few) amount of gain stages. So, when you say:
*Jfet at the input of the amplifier
and
*one gain stage
... does that mean two gain stages in total?
Cicada amplifier prototype. See the post https://www.diyaudio.com/community/...et-class-a-amplifier-codenamed-cicada.390369/
Hi!
I completed my first ever audio hardware project and wanted to share it somewhere. It's not a power amp, but a preamp. I hope it's OK to share it here.
The boards are all ESP; namely a P05 power supply, P06 phono preamp, and a P97 tone control preamp. The case is a black powder-coated 'Cheval' SA-series.
Soon, I plan to build a matching Class B power amplifier based on a project by @LKA (https://www.diyaudio.com/community/...ree-pole-compensated-class-b-retro-amp.385080)
I chose to make the preamp first thinking it would be easier than the power amp, but I am beginning to think that it might have been the more difficult of the two 😅- in saying that though, I have probably jinxed myself.
I completed my first ever audio hardware project and wanted to share it somewhere. It's not a power amp, but a preamp. I hope it's OK to share it here.
The boards are all ESP; namely a P05 power supply, P06 phono preamp, and a P97 tone control preamp. The case is a black powder-coated 'Cheval' SA-series.
Soon, I plan to build a matching Class B power amplifier based on a project by @LKA (https://www.diyaudio.com/community/...ree-pole-compensated-class-b-retro-amp.385080)
I chose to make the preamp first thinking it would be easier than the power amp, but I am beginning to think that it might have been the more difficult of the two 😅- in saying that though, I have probably jinxed myself.