steenoe said:
Nice symmetry, but that toroid concerns me. Might be the one who's humming through your speakers.
Me too. I saw a lot of chipamps on this forum with the trafo very close to the amp boards though. I hoped to get away with this setup. I like the small chassis🙂 Moving the trafo away from the chassis, will tell if that is the problem. It is only a slight hum, but annoying anyway.
Steen.
Just finished the supply boards for the OPA627/BUF634 preamp.
I used Nuuk's schematic here: http://www.decdun.fsnet.co.uk/gainclonepre.html#gcprepsu1 . Well, more or less at least🙂 There is two times +16,5/-16,5v, so each channel is to be fed from its own supply. I must confess that it was a bit time consuming, P2P wiring this supply
Have a look at the boards.
Steen.
I used Nuuk's schematic here: http://www.decdun.fsnet.co.uk/gainclonepre.html#gcprepsu1 . Well, more or less at least🙂 There is two times +16,5/-16,5v, so each channel is to be fed from its own supply. I must confess that it was a bit time consuming, P2P wiring this supply
Have a look at the boards.Steen.
Attachments
That looks really good, Alcaid. I was considering a discrete regulator too, but decided on Nuuk's reg supply in the end.
Have you seen this page on voltage regulators: http://www.tnt-audio.com/clinica/solidstate.html .
Lots of good info.
Steen.
Have you seen this page on voltage regulators: http://www.tnt-audio.com/clinica/solidstate.html .
Lots of good info.
Steen.
I guess you mean me, Soundnerd? The heatsinks are from busted welding gear from my work. The heatsinks are bigger when I get them, so they are cut to size. I get a few of those now and then🙂 I bought the case in Taiwan, you can do it too, if you dare to send your Visacard number out there
BTW the boards for the preamp, are taking shape🙂 They will end up in a chassis just like the poweramp. The perfboard to the right is the VSPS riaa. The small perfboard in lower left is a preliminary setup for Alcaid's CCS/Zener regulator. Yes I ordered some of those J511's today, couldn't resist😀 It will feed the headphone amp😎 Have a look.Steen.
Attachments
Yep😉
Nope😀 😀 I am a lucky guy😎
As for working like mad, did you see the chassis for Aleph-X monoblocks I am making? These chipamps are quick stuff in comparison.http://www.diyaudio.com/forums/showthread.php?s=&threadid=42585&perpage=10&highlight=&pagenumber=6
Steen.
steenoe said:
Yep, have seen it, and it looks MASSIVE!
Watch your back while doing heavy lifting. 😉
- Status
- Not open for further replies.