Pars

Since the attenuator (pot, stepped, whatever) is a voltage divider, it is the ratio of input to amp and amp to ground impedance that determines the volume. Therefore, it doesn't matter how big of pot you use in terms of volume; they are all the same. The different sizes will effect noise, etc. however. Tube stuff typically uses the larger values whereas SS stays at or below 50K (typ. 10K). For the B22, can you not play with the feedback resistors (looks like R4 / R3) to control gain?

Sorry to hear about your grandfather. My deepest condolences.

So the Anagram DSP is adding interpolated sampling points to the Redbook data? I can see how this might smooth out the output, but is this viable to "distort" (in a good way perhaps) the actual recording? The reviewer did seem pretty clueless I would agree (DAC-less CDP... hehe)

I couldn't even find the marketplace... then I read the FAQs. 50 posts for access. I have had a login there for some time, but have never posted.

Postjack: You had mentioned in another thread regarding Genesis pressings that the Seconds Out pressing GECD2001 was your favorite? Any hint as to how to track this down? In searching, I found that this was released on Virgin in 1994... same year that the definitive remaster was released (which is what I have). These are definitely different pressings? Thanks, Chris

I'm not really sure. Looking at the manual online (at twisted-pear), it says: '--------------- Output Characteristics: The output of the buffalo can be used as a voltage source or a current source. Best DNR and THD will be achieved using it as a current source. The differential output of the buffalo is 0.924*1.65V (3.1746 Peak) + 1.65 DC bias and the series output resistance is nominally 195 Ohms at each output. '--------------- Doesn't say whether you have to provision pins/dip switches/programming to select which mode you are using... and from the schematic, it doesn't have different output pins that I can see.

I'm not Filburt, but in answer to your question, I believe they are the same. And I'm not sure who Gilbert is that he is referencing. Current steering basically work much as passive I/V does, with the exception of current mirror(s) actually providing the driving current for the I/V resistor, thereby not loading the DAC output and presenting a (hopefully) very low impedance to the DAC. At least that is my limited understanding of it.

Good to hear!

Seems to be a DB-15 connector? When looking around on Digikey, there also seemed to be a DB-15HD? Not sure what that is about... When you mention that the plugs you tried wouldn't seat fully, you mean the pins?

Have you ever heard one of Pedja Rogic's NOS DACs? Strohmie's CD player / Dynamight had one of these in it. I'm building one, but have never heard one and conceptually I'm not sure I buy into the NOS hype. Wait-- why am I building one???

Aww man... get back on it. I've still quit since January. But I do understand... there have been several times... :smoker:

Nailed it!

That sucks to hear Smeggy. The first band I played in starting when I was in junior high had a really good guitarist who wound up being allergic to guitar strings... he would develop a rash much like what you are describing. He could avoid it by wiping the strings down with rubbing alcohol (can't remember how often he needed to do that, once a set or maybe once a night was enough). Don't think you can wipe the wood down like that though... hopefully you can figure out if it is a particular wood.

I've only printed one or two on plain paper, and they looked good. I'm not into photography like you and others here are, so my eye for such things is probably lacking...

Nice! I bought an MP970 (IIRC) a couple of months ago and so far like it alot. Sure beats the Epsons we used to have <-

Justin FTW! These http://mysite.verizon.net/vze4c5pt/id2.html look nice, but you could do what you need to do with not even 4 resistors, but 2, one in series with each channel, for $0.40 apiece for nice resistors (PRP, Holco, etc.). Yes, you would want to probably solder these into the Almarro, right before the volume pot if you could. The pot will provide the resistance to ground required.

Have 'em put an RK50 in it Then it meets Nate's criteria... both of them

No breakers between individual grounds. As another poster said before, the grounds must be at the same potential; otherwise its like plugging things into outlets on different circuits which is usually a recipe for ground loops. There are circumstances where PSUs can pollute the ground (actually more like noise coming back right thru the PSU); particularly those of digital equipment. PSU design is really an art (a very scientific art) from what I can see and there don't seem to be that many people that are really good at it. And alot of people have the attitude that its just a power supply; all the same, right? Puts out voltage, so its all good All I know is that when I put a DMM (or a pair of them) on supplies like the Gilmore Dynamic or on a sigma22 and see nice tight tracking and really stable readings (like not changing 0.1mV) and can't see anything on it with my Tek 465b, I'm happy

Not sure where to put this, but the quote (postjack) was from what are you listening to thread, but got buried (quickly)... Any idea where I could try to find this set at? I spent some time online looking with no luck...

I've been playing around with an earlier version of Christian's (Cauthemoc on hf) designs. This one is a real current conveyor (ala Hawksford) design. It is somewhat more complicated (more parts), but should sound good. I would like to at least breadboard this one up some time. This one has extremely low input impedance (0.3 ohm) according to Christian... I can't calculate that and don't run simulations (which is how he calculated it IIRC). He is an engineering student in Switzerland, and seems to know what he is doing...

I've used Olimex once for some boards and they were fine as well. Not as good of quality as Imagineering, etc., but much better than I expected... and much cheaper.

Jocko's (incomplete... for ideas only, but will work) http://www.diyaudio.com/forums/showthread.php?s=&threadid=6121&highlight= interesting thread... Nicke is one who supposedly figured Jocko's stage out, and has a stage posted on diyaudio IIRC: http://www.diyhifi.org/forums/viewtopic.php?p=3712&highlight=simple#3712 rbroer's less simple TDA1541a stage (this is the one I am using minus the PSU emitter follower stuff) http://www.diyaudio.com/forums/showthread.php?s=&threadid=22542 rbroer also has a simple 1541a stage, as well as one or two 1543/1545 stages, one of which is what is used for the monica dac. Search diyaudio if you are interested in these. The one above is probably the best model for adapting to other DACs. ANd another thread, some on the rbroer as well as others: http://www.diyaudio.com/forums/showthread.php?s=&threadid=54608&highlight=

which ones?

I personally prefer the no feedback discrete current conveyor type I/V stage (ala Jocko and variants... rbroer, cetoole's is one as well and looks good). To be honest, I haven't tried passive mainly because it sucks, at least with a TDA1541a which doesn't have the current to really drive a resistor. Iout on a DAC really wants to see a dead short, and any resistor, particularly one large enough to give you the output voltage needed isn't going to be close to that. I have also not tried transformers, as they are quite expensive. I think you can build a better discrete stage than a zapfilter as well. I have done quite a bit of opamp rolling, and other than the THS4031/4032 which I never got around to trying, I would not consider going back to them... discrete just kicks them too badly. Is the IVY a discrete stage or is this the one using a THS4031? Or another really high speed chip?