November 24, 201015 yr On a more serious note, has anyone managed to get any info about the lsj109? Past constant promises of more info soon?
November 26, 201015 yr Author found a wiring error on the main board, and added .5 inch resistors over the surface mount, so it can now be built either way. can't post anything till power is restored to my servers.
November 26, 201015 yr 1/2" makes me happy as I can use my carbon films... Go for Dale RN60D, Spritzer - as near to a perfect resistor as you are likely to get and still not take out a second mortgage
November 26, 201015 yr I have piles of those, I always buy 100 at a time so I get them in the small box. I still want to test why the Japanese high end always turned to Riken for the most crucial resistors in any circuit. Look inside any high-end Sony, Denon, Yamaha etc. (and I'm talking about the true state of the art stuff here, what they normally only sold in Japan) and they are filled with those lovely carbon film units.
December 22, 201015 yr Author I should have a working "supersillious" power supply for this thing in the next couple of days. Hybrid voltage controlled current source feeding a dual tracking shunt regulator.
December 24, 201015 yr Author this should raise a few eyebrows a christmas present for all head-casers... taken from an actual device, so if i did it right, it should be 100% correct, and the only known complete schematic (not including a pair of lm317 pre-regulators) http://gilmore.chem.northwestern.edu/vendetta.pdf
December 24, 201015 yr Smashing!(never seen it before) I know the one who requested it should be very pleased. Cant wait to see the totl ps. merry christmas to you tooo Kevin. Edited December 24, 201015 yr by digger945
December 24, 201015 yr ah the 2SK147/2SJ72.... Should C6, C7 connect on the other side of the R22, R23? Edited December 24, 201015 yr by luvdunhill
December 24, 201015 yr Author fixed... If you are building it yourself, the xono is going to be easier. But the xono has coupling capacitors between the stages and at the output. So if you want DC coupling... (required riaa network is always going to require capacitors) Its a shame no one has done the input stage as balanced. Makes all the sense in the world for reducing hum. Edited December 24, 201015 yr by kevin gilmore
December 24, 201015 yr The Xono can be DC coupled. Mine is that way. Perhaps you can notice the jumpers in this pic (which are open) near the output caps: As for balanced input, I believe the Ayre P-5xe is. Here's a pic: Finally, I'd be interested in a schematic for the Klyne phono preamps. They have items encapsulated in little potted enclosures though, so you'd have to bring it into the lab I suppose:
December 24, 201015 yr fixed... If you are building it yourself, the xono is going to be easier. But the xono has coupling capacitors between the stages and at the output. So if you want DC coupling... (required riaa network is always going to require capacitors) Its a shame no one has done the input stage as balanced. Makes all the sense in the world for reducing hum. Anything special about the Vendetta power supply?
December 24, 201015 yr Author Anything special about the Vendetta power supply? A pair of lm317 3 terminal regulators feeding fets as current sources feeding pass fets. Cheap and effective. $20k blowtorch does exactly the same thing. You can certainly do much better these days including tracking regulators to reduce the pumping of the servo's. And much lower noise. I saw a schematic for the klyne a while back, no idea if it was accurate or not, the modules are just discrete fet opamps. The sutherland is an expensive joke. The ayre is much more my style these days Edited December 24, 201015 yr by kevin gilmore
December 24, 201015 yr Author First power supply working and tests at a total of noise of 300 nanovolts peak to peak. (under slightly more than full load of 200ma) I was hoping for better, but this is measured outside of a screen room, so it may actually be lower.
December 24, 201015 yr So, does the Klyne use opamps for gain? Near has to to get the specs quoted. I have slightly different values for things like R30-31 (100K) but that doesn't matter. It would be useful to note Idss grades for the unobtaniun ... Err JFETs if you have good pics that can read the markings.
December 24, 201015 yr Author The important fets are super glued together back to back. I don't want to mess with it and risk destroying it because there are no replacements. The others have no markings on them other than the part number and that typically means the BL... It sure seems that each and every unit had different resistors to adjust gain and DC balance. I may have found suitable replacement parts, but i have to build and test... But first i have to order a bunch of them. The klyne are an all opamp design with the opamps made from discrete parts. Really the same thing as the vendetta, and many others. Only way to get the noise down is with discrete parts.
December 25, 201015 yr This might be lame, but have you guys read the old 2006 vendetta thread over at DIY Audio? The original designer chimes in a few times, plus there's a lot of discussion about unobtanium. Link: http://www.diyaudio.com/forums/analogue-source/90900-real-vendetta.html
December 25, 201015 yr This might be lame, but have you guys read the old 2006 vendetta thread over at DIY Audio? The original designer chimes in a few times, plus there's a lot of discussion about unobtanium. Link: A real Vendetta? - diyAudio Yup KG mentions the thread(s) in the first post. I read it when I feel suicidal at work
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