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I built this DAC kit from DIY Paradise called the "Monica 2" it sounds fantastic but only has .8v output. I have a friend that has more experience than anyone, when it comes to preamp tubes. He told me that his favorite preamp tube is the 6H6P tube and not many people know about it. So I decided to build a gain stage for the DAC using the 6H6P tube , which was a little bit of a challenge because there is so little info regarding this tube.I decided to build my own chassis from scratch. It sounds so good that I actually have lost interest in vinyl. I'm not saying that it sounds better than vinyl but it's not much of a compromise.
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i have the monica with the grounded grid 6688, they sound very very very good with very little cost
6N6p is almost the same, spec wise, as the 5687. In a pinch, look at the 5687's datasheet. But, do note that the pin out is different. It's a good tube, not my favorite tube, but a good solid all around performer ... maybe a little on the sweet side.
http://klausmobile.narod.ru/testerfiles/6n6p.htm
I also built the Monica Dac from DIYParadise and then because of the low gain, I added the grounded grid / triode wired 7788 (premium 6688) output/buffer stage as recommended on their website. Sonically, it comes very close to my AudioNote 2.1X balanced DAC for a fraction of the cost, or maybe it's because I built it. whatever. regards, wpod
I have the Monica 2 DAC with
a 100H choke loaded 12B4
and Dave Slagle's ATVC.
Very Nice Sound !!!
DanL, Did you choke load the plate of the Etude or do something different altogther?
DougI went whole hog on this puppy.
Constant current DC on the filaments.
Directly connected from the IC to the grid.
9V NiCad Battery on the cathode.
Batteries to run the DAC board.
MQ EXO-99 choke on the 12B4.
James JS-928 Power Transformer.
Raytheon GZ34 rectifier.
RCRC split RC filter before the choke.
Dave Slagle's Auto Transformer Volume Control on the output.
12B4 runs at about 16mA which sounds nice.DanL
Yes, Monica is a nice dac. I use the D3A in triode mode as output amp
loaded with a CCS unit.
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