I have built the NJFET phono pre by Salas and I can say that even with modest components and on perfboard it performs very well, as many other builders would agree. The thread is long but there is a PDF summary (actually there are a few) that covers all the basics. Check Salas's evolution/update link on the first post to take you to the latest "basic" version of the circuit.
Salas also has a shunt reg that is recommended.
Both have single sided PCB files around too.
Cheers,
Tani.
Thanks for the kind words everyone..🙂
I cant tell you exactly what the temp is as I dont have a IR thermo. I did run it for 8hrs biased at .65 and the whole case was cozy warm to the touch, not uncomfortable at all.. When I touched the mosfets they felt about the same temp as the case.. So far so good.....
Thanks for the tip on the blade🙂
The tubing came from Online metals.com
Yes a thin line of thermal grease squeezes out nicely when the tube is tightened down
I cant tell you exactly what the temp is as I dont have a IR thermo. I did run it for 8hrs biased at .65 and the whole case was cozy warm to the touch, not uncomfortable at all.. When I touched the mosfets they felt about the same temp as the case.. So far so good.....
Thanks for the tip on the blade🙂
The tubing came from Online metals.com
Yes a thin line of thermal grease squeezes out nicely when the tube is tightened down
Attachments
And he did the whole thing with a table saw! LOL
Man that looks absolutely beautiful. You are quite an artist.
Uriah
Man that looks absolutely beautiful. You are quite an artist.
Uriah
"Decent" - a word that'd be at the bottom of the scale of possible descriptions for what you've done. Wow ...
Give us Hi-res shots, pretty please, with sugar on top!
Give us Hi-res shots, pretty please, with sugar on top!
The restrictions are very lax.
There is a Thread about downloading appropriate sized pics.
It depends on the detail you want us to see.
There is a Thread about downloading appropriate sized pics.
It depends on the detail you want us to see.
when you hit "manage attachments" button bellow reply window , you'll see info about size and pixels of various formats
Don't worry about it, but for forum posts about 600 pixel wide is pretty big.
But you could always link to full-rez photos as well...
But you could always link to full-rez photos as well...
800 to 1000 pixels wide with appropriate cropping and compression give acceptably small file sizes that suit almost all Members and still give lots of detail.
Ok, here are some higher rez photos, I'm still working on the hand rubbed tung oil finish but I had to post anyhow. Its hard to see but there is a 1/4" gap between the top and bottom edge of the heat sink and the wood so air can flow up the inside back of the sink and out the top all along the long edge. For whatever thermal reason it seems to keep it running cooler than when I first built the amp and the sinks were vertical with no flow up the inside face. Just one of many details. FYI, the multi wood parts are all 1/4" thick, that is not some thin verneer.
My apologies for the shaky iphone pictures. A friend is going to take some REAL pictures of it and my little Tripath 2020 amp along with some of my other woodworking using his big Nikon setup. We'll see how that goes. Now to design a case for my mini-Aleph.
I must admit that I built the V9 so I could compare it with my Tubelab 300B SE driving my Decware HDT full range speakers. While the V9 sounds excellent I find the 300B to be a more engaging experience. Any of you out there that have spent time with a 300B amp probably know what I mean, 'magical' in a word. That said I intend to run the V9 for another month or 2 just to give it a fair chance 🙂 My thanks to one and all, especially 'Papa" for a good solid design that is indeed no slouch of an amp.
I must admit that I built the V9 so I could compare it with my Tubelab 300B SE driving my Decware HDT full range speakers. While the V9 sounds excellent I find the 300B to be a more engaging experience. Any of you out there that have spent time with a 300B amp probably know what I mean, 'magical' in a word. That said I intend to run the V9 for another month or 2 just to give it a fair chance 🙂 My thanks to one and all, especially 'Papa" for a good solid design that is indeed no slouch of an amp.