Pars

The player has both single ended and balanced outputs, so both need to work. Output jacks will remain wired to the main board. So with his preamp (I presume you know who this is for), the two halves of the I/V stage boards (+ and - signals per) need to be within a mV of each other? Hmmm, didn't know what I was signing up for here May not be a problem as they seem rather close just checking individual offsets to ground, but that is on the bench and just each individual board.

I'm modding an Adcom CD player for a member here, installing a pair of Colin's I/V boards (player is balanced), and am debating on how and where to connect ground on these to the main board and power. These boards have on-board shunt regulators, so I am tapping power from the main filter caps right after the rectifiers for the 2 +/-15V power supplies for the analog section on the main board. AFAIK, it is usually not a good idea to connect more than 1 ground per board. The options I see are: Ground the boards through the power connector Ground the input of the boards Ground the output of the boards Currently, I am leaning towards #1, thinking that noise from the shunt regs, etc. should feed back to the ground plane near the PSU instead of being dumped into the ground plane near the DACs. Ground plane seems to be common between the sections. The one that Colin did (same player) used #2. The stock analog stage is completely depopulated, other than the muting relays. From the schematics, it does not appear that anything else uses the +/-15V supplies. Thanks for any thoughts.

Happy Birthday John! Hope you have a great one, even with the snow.

Sounded like Monster (Beats) was capturing 53% of the headphone market. Further, audio gear sales is 60% of Monster's revenue. What else do they make? Don't cables, etc. count as audio gear? Maybe their cable business is down that much? Whatever.

^ This is the repair guy that we have used for 15 years, and co-workers have as well. His recommendations are usually pretty spot on. Buy basic quality (the guts) first. Only add bells and whisltes if you have to have them. A fridge that the compressor goes tits up on, but still can talk to the internet is pretty useful, no? http://www.allbrandservicenaperville.com/products.html

^ this

percy audio http://www.percyaudio.com/

Happy Birthday Luis!

Nice Chris. I managed to get out for about an hour and 15 minutes on Friday (18 miles). Still old, fat and slow, but it was fun and really nice for January (about 53-54 degrees, light wind, sunny).

Great to hear you are improving Mike. Looks like the right side of your mouth is moving when you smile, which is always a good thing And bitchin' eye patch as well!

Happy Birthday! add what Tyll said as well!

Read the reviews at the innerfidelity link. Forget about making much (if any) sense of most of what is regurgitated at head-fi. Barring that, what jantze said.

Nice Nate! and Chris! I was hoping to get in a ride either Friday or Saturday but the weather didn't cooperate, and I am just starting to get over a bad chest cold, so really didn't feel up to it anyhow. Today just sucks weather-wise, much like I am guessing Aimless1 is going thru.

Good idea, other than the math. He would wind up with 6 strips of 4 ea. at the end

Happy Birthday!

Kerry indicated in a previous post () that he had to drill the 10m90s and some of the FETs with a #28 bit to get those to fit. The part number appears to be correct Craig. Nice to have you back!

^ This as well.

Happy Birthday Jacob!

Looks great Tom! My brother still likes his proto unit. Not sure I would be directing twerps here from the website though... seems to be a rash of them lately

Best of luck Ric (and Melissa)!

Happy Birthday!

Happy Birthday Andy!

^That, plus use some PCB mount TO-3 sockets. Mouser has some Keystone ones. Or use solder tab sockets, and wire to the PCB. These look pretty decent. http://www.mcmelectr...product/21-1645 There are also Tyco (IIRC) sockets that look really nice, but are $$$ EDIT: Also, there are two lead diameters used on TO-3s (0.041 and 0.060"), and many sockets only accept the smaller diameter. Don't ask how I know

As far as I know, the US military does not use RoHS stuff but leaded solders. Kevin or someone more knowledgeable might know differently. I wonder how this effects RSA clams of mil-spec, yet selling into EU countries?