No sweat, I measured my unit and its, 3/4mV. Also, if you know the thing you are going to drive, it may not matter if it is 1V. So it depends on your preamp,...
Craig's site has a good diagram of how to build-in an attenuator int a jack. Anyone help me out with this mod for a inside job? Although my preamp does not...
What does terminating the digital out to ground with the 75 ohm resistor prevent/accomplish? Can anyone throw some technical insight about this my way? Thanks,...
I posted the following on AA and didn't get an answer. Hopefully, the brain trust here can provide some insight. <<I'm curious about the circuit on the I/O...
John, The 220 Ohm resistors are there to isolate the op-amp from the capacitive load of the cable and are required (unless you like an unstable output stage)....
Thanks Jack! Now maybe I can tinker a little more intelligently. I ordered a full set of better grade PS caps per Craig's recommendation - grabbed some 100pF's...
... Hi John, Those caps are only an example, stuff that fits and easy to get. I measure characteristics of caps and reject most of what I buy (anal), but these...
Hi Jack, I deleted the posts because the original solution was essentially OK after all. Not much interest to anybody here, but put on my page anyway in case...
This might be off topic, but the regular audio boards haven't been able to answer this (other than to suggest I buy a new sound card with s/pdif in). A few...
... Unfortunately, that's probably because it's the best answer. ... Unfortunately, you presume wrong. SPDIF isn't directly compatible with either USB or...
I have been planning on attempting to add a coax output to my cdp as it only had optical out and wanted to use it with my dio. I am very happy to say that I...
Thanks for writing this one up - It is a relatively easy mod, and will certainly sound better than the optical output, which adds a lot of random jitter on...
I agree that coax sounds better than optical. I've gained this -plus I can now use a great dac like the dio with my cdp. It really does sound good now. Dave...
jack, thanks for the info. i tink i understand it, but i *may* ask ya to fax me a sketch... ;~) couple of questions - you say you used the 2N5459; then you...
Hello Doug I just sent a scan of a drawing to Craig Frazer which I think he is going to put on his web site. I also mailed it via snail mail to Vince. This...
Hi I put the LT-1365 and 2N5459 data sheets in the files section, so take a look. Op-amps use a notch at the end, or a "dot" next to pin one to show where pin...
Hi Jack, If I said 2N5456 then that was also a typo! It should be 2N5457. That and 2N3819 are the ones I have here, the 2N3819 being almost identical in specs...
Has anybody looked at this? Would like to put together some info on it for "completeness" sake. Will get one myself next time I make a Digi-Key order, but may...
Please be patient with my question about the op-amp modification. I have no background or experience in doing this so bear with me. I am about to order the...
thanks, bob & jack. w/the foto of the jfets, & the ordering # of the op-amp pins, it all makes sense! ;~) question - is 1.3-1.7 ma ok, or do i want to get...
Check the FAQ for some details (http://www.interlog.com/~cfraser/home.htm), but the basics are described below. Taking the old TL074 op-amp out is the tricky...
Mcneice, Robert
robert.mcneice@...
Dec 6, 2001 1:58 pm
92
I'm not sure if I missed it or not, but were there instructions describing exactly what to do in order to change the D/IO's analog output levels by changing...
Chris
ck42@...
Dec 6, 2001 2:08 pm
93
Thanks, I was wondering about this too. One further question: is it necessary to put in an IC socket, or can one directly solder the new op-amp into the holes...
I just checked the AA digital board, and noticed cfraser answered most of my questions already. As I undertand it, soldering in a socket is easier than ...
Actually, soldering a socket is no easier OR harder than soldering in an IC. The socket is almost a kind of 'dummy' IC in a sense; you're just able to plug...
Chris
ck42@...
Dec 6, 2001 5:50 pm
96
Bob, Thanks for explaining the entire process. Just what I needed. One last question. Have you done the biasing yet? How difficult is that? Thanks again. Lou....
Yep, looks like the one I used in adding a digital out to my cdp. You can download a datasheet from digikey I beleive or link to Mfg site. Also look in the...
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