How would I go about replacing the 3.5mm jacks with 1/4" ones? I bought these, which are surface mount. I understand I'll have to use wire between the holes on the board and the contacts on the jack. It's just not obvious to me which correspond.
NJ3FD-V Neutrik | Mouser
It looks like that has 5 contacts, but mine didn't come that way. I have the top one, then the two that are closest to it on the sides. I'm missing the bottom two.
NJ3FD-V Neutrik | Mouser
It looks like that has 5 contacts, but mine didn't come that way. I have the top one, then the two that are closest to it on the sides. I'm missing the bottom two.
jtktam, here are some?
http://www.diyaudio.com/forums/head...eadphone-amp-diy-project-251.html#post3053835
What do you expect to see? Knowing that would make it easier to take the right shots.
Brgds
http://www.diyaudio.com/forums/head...eadphone-amp-diy-project-251.html#post3053835
What do you expect to see? Knowing that would make it easier to take the right shots.
Brgds
It would be useful to know nominal source amplitude (or the type of source), and whether the amp will be operated on batteries or on mains power.
Sensitivity is likely to be quite different between the two headphones. CX500s (assuming they are original) are specified at 113 dB / 1 V, while HD570s only output 102 dB / 1 V (at a nominal 64 ohms) and are almost as hard to drive as K701s. It would make sense to run one on low gain and the other on high gain.
Sensitivity is likely to be quite different between the two headphones. CX500s (assuming they are original) are specified at 113 dB / 1 V, while HD570s only output 102 dB / 1 V (at a nominal 64 ohms) and are almost as hard to drive as K701s. It would make sense to run one on low gain and the other on high gain.
How durable are the lines on the board? I was cutting the traces for the ODAC and I slipped a little and scratched the line above it. I can see a little bit of copper, like barley noticeable... is that ok?
There's a very high likelihood that you're absolutely fine.
There's a very high likelihood that you're absolutely fine.
Lol just making sure.
I hate to be "that guy", but this isn't really an ODAC thread....
Oh like mine is the first post about the ODAC? Scroll back a few pages.
Checked everything and it looks good..If your AC adapter is good, there is likely a component oriented incorrectly or a solder bridge creating a short. Inspect the DC jack, diodes, capacitors, & regulators for a problem.
Just finished my first o2 Amp!
Works great from battery, however, when powered from the AC adapter wau12-200 there is a very loud buzzing sound and no music is playing.
Do you have the same problem when the front panel is removed? What about when the board is removed from the case?
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