luvdunhill Posted July 7, 2008 Report Share Posted July 7, 2008 I'm considering getting a few Pass Pearl phono PCBs made up. Is there any interest here? Quote Link to comment Share on other sites More sharing options...
hYdrociTy Posted July 7, 2008 Report Share Posted July 7, 2008 I want one. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted July 7, 2008 Author Report Share Posted July 7, 2008 actually, I found someone with a stash of the original PCBs sold by PassDIY. So, I'm going to go this route myself. I will inquire on how many they have. Also, if anyone is wanting to split a pair (the boards are mono, so 2 required for stereo) I'm up for that too as I'd like a single board for a mono preamp. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted July 7, 2008 Author Report Share Posted July 7, 2008 seller has plenty... Quote Link to comment Share on other sites More sharing options...
grawk Posted July 7, 2008 Report Share Posted July 7, 2008 Don't suppose 4 could be used as a balanced phono stage? for MC? Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted July 7, 2008 Author Report Share Posted July 7, 2008 Don't suppose 4 could be used as a balanced phono stage? for MC? nah, just 2 needed for balanced operation Quote Link to comment Share on other sites More sharing options...
grawk Posted July 7, 2008 Report Share Posted July 7, 2008 I thought the pearl was a single ended xono? Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted July 7, 2008 Author Report Share Posted July 7, 2008 service manual and BOM for Pearl: http://www.passdiy.com/pdf/pearlphono.pdf grawk: the Xono has a balanced output, yes, but it's not generated how you might think. Here's a schematic of the MM portion of the Xono (edit: not the exact circuit, but same topology): http://www.rstaudio.de/AlephOno/Rev2/AlephOnoMM.pdf The circuits are indeed different, this is a common misconception. Quote Link to comment Share on other sites More sharing options...
grawk Posted July 7, 2008 Report Share Posted July 7, 2008 That's way over my head . If 2 of these can be made into a balanced phono stage, I need to talk to someone about what it'd take to get that done... Quote Link to comment Share on other sites More sharing options...
thrice Posted July 7, 2008 Report Share Posted July 7, 2008 I'm in for 2. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted July 7, 2008 Author Report Share Posted July 7, 2008 That's way over my head . If 2 of these can be made into a balanced phono stage, I need to talk to someone about what it'd take to get that done... yeah, it cannot really be made into a phono stage with balanced outputs... Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted July 7, 2008 Author Report Share Posted July 7, 2008 looking at this again, I think it can support MC carts as low as 0.4mV or so... Quote Link to comment Share on other sites More sharing options...
Grand Enigma Posted July 8, 2008 Report Share Posted July 8, 2008 Someone build me one Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted July 8, 2008 Author Report Share Posted July 8, 2008 Someone build me one it's a pretty straightforward project really. no circular hole tech skills needed. Quote Link to comment Share on other sites More sharing options...
Grand Enigma Posted July 8, 2008 Report Share Posted July 8, 2008 it's a pretty straightforward project really. no circular hole tech skills needed. Right but I am lazy and don't want to gather the parts and largely don't want to do any case work. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted July 8, 2008 Author Report Share Posted July 8, 2008 Price will be $40 per stereo set, with a few dollars for shipping from Germany to me (depends on the number of people interested, probably around $4) and then a few dollars shipping from me to you. The board files are available, but I'd rather go this route personally. I'll close this IC on Friday 7/11/08 and collect money over the weekend. Quote Link to comment Share on other sites More sharing options...
n_maher Posted July 8, 2008 Report Share Posted July 8, 2008 Depending on how it breaks down it might actually be better to have the boards sent to someone in the US who could then send you your set and forward along the others saving an unnecessary trans-Atlantic trip. Just a thought. Quote Link to comment Share on other sites More sharing options...
grawk Posted July 8, 2008 Report Share Posted July 8, 2008 I think he was offering to be the cross ship point, nate Quote Link to comment Share on other sites More sharing options...
n_maher Posted July 8, 2008 Report Share Posted July 8, 2008 Probably, I'm easily confused these days. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted July 8, 2008 Author Report Share Posted July 8, 2008 yes, that's the plan. I may be doing a group buy for the Linear Systems JFETs, assuming there is enough demand. These will work fine with these boards if you cannot come across the Toshiba parts. Quote Link to comment Share on other sites More sharing options...
Pars Posted July 8, 2008 Report Share Posted July 8, 2008 yes, that's the plan. I may be doing a group buy for the Linear Systems JFETs, assuming there is enough demand. These will work fine with these boards if you cannot come across the Toshiba parts.The footprint/package type isn't even close to being the same on these??? Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted July 8, 2008 Author Report Share Posted July 8, 2008 The footprint/package type isn't even close to being the same on these??? close enough for government work Quote Link to comment Share on other sites More sharing options...
n_maher Posted July 8, 2008 Report Share Posted July 8, 2008 close enough for government work MILSPEC??? Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted July 8, 2008 Author Report Share Posted July 8, 2008 MILSPEC??? heh.. the Toshiba parts a D1G1S1xS1G1D1 from left to right. The LSK389 are S1D1G1 on one side (so snake the S1 between D1 and G1 and your good there) and S2D2G2 on the other (so snake G2 between S2 and D2). I'd recommend using zigzag sockets on the original 2sk389 socket to facilitate this, so you can get the new device situated in the socket and then plug the socket into the PCB and solder it. If you're less adventurous, just use a matched pair of the single devices. Quote Link to comment Share on other sites More sharing options...
Pars Posted July 8, 2008 Report Share Posted July 8, 2008 The footprint I have seen of the LSK is a round footprint, not linear? I suppose with some creative lead bending and perhaps some teflon tubing... http://www.linearsystems.com/datasheets/LSK389.pdf Quote Link to comment Share on other sites More sharing options...
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