Very nice!. I would just turn upside down those boards, since with time all dust will get inside amp and can get on the boards connections and accumulate and get a short.you have more chances to get more problems this way than putting it upside down. just my opinion!
There is cooler fan and tunel heatsink any dust cant go insaid amp. I turn upside down those boards in future amps.
Try to get a bigger heat sink, that way you can eliminate the fan (noise).
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In PA use noise is not a problem, fan turn on after heatsink was worm, than music level is so loud than can not hear the fan noise.
studiomaster mk2 sound good? Why ditch and final transistors use if possible and with the printed wiring
My Mark Houston ZCA sans output caps
Here's some pics of my ZCA I built about 7 months ago. The rugged industrial look probably isn't for everyone. I kinda like that you can look at it and see how it works. Each channel has eight 30 ohm 10 watt resistors arranged to provide the 15 ohm load specified by Mark. I used 8/channel basically to increase the surface area and help with cooling. I don't really know if it helped or not, they run at about 145F (66C). Heatinks were purchased as a set from ebay.
Fuse is integrated into the receptacle. In the out-of-focus picture the chassis ground is the green wire (sorry, I forgot to turn macro on for that one 😱).
Transformer is an 18 + 18 250VA Avel. Each secondary has its own bridge and filtering and powers a single channel. Eventually I'll get new filter caps and play with better (?) rectifier options. I'm use Erse Super Q 10mH 500w inductors as chokes.
I use it to bi-amp mid/tweeters in my 3 ways which both have series caps so I can get away without the electrolytic output caps (they are functional in the photo).
The last photo shows an important reminder to my future self.
The sound is quite pleasant. Percussion, vocals, and instrumentals sound extremely dynamic and lively. I have noticed it doesn't sound as good as my regulated gainclone when sources have limited dynamic range (television commercials). The ZCA sounds more distorted at comparative volume levels. With well mixed sources distortion seems subjectively low or maybe just more enjoyable to my ears.
Here's some pics of my ZCA I built about 7 months ago. The rugged industrial look probably isn't for everyone. I kinda like that you can look at it and see how it works. Each channel has eight 30 ohm 10 watt resistors arranged to provide the 15 ohm load specified by Mark. I used 8/channel basically to increase the surface area and help with cooling. I don't really know if it helped or not, they run at about 145F (66C). Heatinks were purchased as a set from ebay.
Fuse is integrated into the receptacle. In the out-of-focus picture the chassis ground is the green wire (sorry, I forgot to turn macro on for that one 😱).
Transformer is an 18 + 18 250VA Avel. Each secondary has its own bridge and filtering and powers a single channel. Eventually I'll get new filter caps and play with better (?) rectifier options. I'm use Erse Super Q 10mH 500w inductors as chokes.
I use it to bi-amp mid/tweeters in my 3 ways which both have series caps so I can get away without the electrolytic output caps (they are functional in the photo).
The last photo shows an important reminder to my future self.
The sound is quite pleasant. Percussion, vocals, and instrumentals sound extremely dynamic and lively. I have noticed it doesn't sound as good as my regulated gainclone when sources have limited dynamic range (television commercials). The ZCA sounds more distorted at comparative volume levels. With well mixed sources distortion seems subjectively low or maybe just more enjoyable to my ears.
Attachments
These are the SSB01 PCBs Per-Anders is giving away...turned out pretty good. I still have one more to build before I can put them in an amp...
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Some pictures of my "Germanium Headphone amp".
Thread here,
http://www.diyaudio.com/forums/headphones/160646-germanium-single-ended-class-headphone-amp.html
Thread here,
http://www.diyaudio.com/forums/headphones/160646-germanium-single-ended-class-headphone-amp.html
Attachments
Hi,
This is my project for home use.
Complementary mosfet amplifier 300w(8R).
PSU-Unit for audio with very fast power response and low IMD conduction on amplifier.
Regards
P.S. Amplifier is free(not Reserved), I can post on thread complete schematic.
Include low-noise,flat response, CD player preamplifier on board.
This is my project for home use.
Complementary mosfet amplifier 300w(8R).
PSU-Unit for audio with very fast power response and low IMD conduction on amplifier.
Regards
P.S. Amplifier is free(not Reserved), I can post on thread complete schematic.
Include low-noise,flat response, CD player preamplifier on board.
Attachments
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Hi,
I can now proceed to listen (I have two mono-block), 2x speakers are Sonus Faber "Amator". I first checked all the protections included dc-offset.😀
Short put on this thread all measures.
Jazz and classic I think is hard test with this speakers.🙂
PSU out +/-70V
Regards
I can now proceed to listen (I have two mono-block), 2x speakers are Sonus Faber "Amator". I first checked all the protections included dc-offset.😀
Short put on this thread all measures.
Jazz and classic I think is hard test with this speakers.🙂
PSU out +/-70V
Regards
Attachments
Hi PMA,
This is Class A-B MosPower amplifier.
we're listening to a real surprise to the growing behavior (classic music), and string bass (Jazz). it is obvious that the PSU voltage drops very little.
Ok, after listening to continues with measurements
Regards
This is Class A-B MosPower amplifier.
we're listening to a real surprise to the growing behavior (classic music), and string bass (Jazz). it is obvious that the PSU voltage drops very little.
Ok, after listening to continues with measurements
Regards
Hi Mooly
Beautiful project... My compliments sir!
I like very much the two RCA sockets. I think, as well, that you made the PCB by alone? If yes, then again my compliments sir!
Fotios
my dear friend fotios .... how are you leventi ????ola kala ???
soon my latest project is also coming up ....
soon my latest project is also coming up ....
Gia sou Saki dervisi, to almpeni sou na mi svisi...
Thanks for your warm greetings... I have resolved by 50% my economics, so ola kala (to the present 😀). I am in waiting to see your project. I wish you success, and maga, don't make plakomatzidikes works, unless the IMF is coming up 😀.
Tell me, what happens finally with OMIKRON?
Fotis