Is it just me, or is it that Prodigy HD2 seems to be always the target for this kind of mods? 😀
Over at Head-Fi he's been banned for quite a while. I think there have been several issues like having strong oppionions of things he's never heard and sending uncalled-for PMs to members (including myself). He's shown up again and again under different aliases until he started these threads here.
Maybe we should have a "The Wild Opamp Rollers Thread" where everything's allowed.
Banned for liking opamps? Some of them sound damned good. One really has to work hard to beat the top shelf ones like AD797 and OPA827.
Everytime someone gets banned it's not a a good time, we're going to miss something.
Obviously I can understand why DIY Audio moderators banned Andrea (like moderators all over the web it seems...) but it still makes me blue... 🙁
Well, I hope that was the reason. because if He got banned just because He likes a kind of amp...that is uncalled for!. I like gainclones LM3875 from Peter Daniel (Audiosector) and I also love my new nxv200 amp kits from Anthony (Aussie amplifiers). so if you see me I got banned...Now you know is because I said I like these amps lol. I see you later (I hope lol).🙁
hello i`m having problems with lt1028 i picked up today
they are working in a usb soundcard i designed and built (custom pcb etc.)
the circuit looks like this: pcm2706->tda1543->opa604 i/v stage (set up like in the datasheet) -> 2.2uF wima mkp -> 49k dale / 50k shunt pot -> lt1028
previously i had opa602 and it worked flawlessly but sounded not so good
lt1028 sound really great but at certain volume levels (changed by the shuntpot) i get a little hiss or distortion in the background and it gets on my nerves
supply voltage +/- 15V
3.3uf+0.1uF both wimas from +V/-V to gnd as near as possible
gain of 8
non inverting configuration
any suggestions? i tried putting a 22pf np0 ceramic between ni input and output and it seems it works but at the same time it seems to kill everything i like in the sound this opamp produces
any ideas? i can post schematics/photos if it helps
they are working in a usb soundcard i designed and built (custom pcb etc.)
the circuit looks like this: pcm2706->tda1543->opa604 i/v stage (set up like in the datasheet) -> 2.2uF wima mkp -> 49k dale / 50k shunt pot -> lt1028
previously i had opa602 and it worked flawlessly but sounded not so good
lt1028 sound really great but at certain volume levels (changed by the shuntpot) i get a little hiss or distortion in the background and it gets on my nerves
supply voltage +/- 15V
3.3uf+0.1uF both wimas from +V/-V to gnd as near as possible
gain of 8
non inverting configuration
any suggestions? i tried putting a 22pf np0 ceramic between ni input and output and it seems it works but at the same time it seems to kill everything i like in the sound this opamp produces
any ideas? i can post schematics/photos if it helps
ok thanks for the explanations!
so you can replace op-amps by pricey transformers huh
he's usually using Burson op-amps and already tried pretty much every op-amp in the book, I'd trust his judgment
I wonder if he has tried this:
Audiotrak Prodigy HD2 Sound Card
😱
he surely did. he used to sell standard hd2 w/
- 3x Burson Dual Opamp
- 7x 25V 470uF Panasonic FM (PSU filtering)
- 5x 35V 470uF Panasonic FM (" )
- 6x 16V 4.7uF Sanyo Oscon SH (" )
- 7x 1uF Vishay MKP1839 (opamp/chip decoupling near the pins)
- 7812ACV +12V regulator instead of standard 9V
- 7912ACV -12V regulator
- LT1086 +5V regulator for DAC analogue supply
- 4x 470pF WIMA FKP2 for high/low pass filtering
- 4x 10V 220uF Panasonic FC signal coupling
now there's only the hd2 w/ huge transformers 😀
Source PC | Gooi PC's
Yes, there was. And he's been serially banned from (seemingly) every other audio forum.
http://www.diyaudio.com/forums/everything-else/5121-sin-bin-9.html#post2062372
- Ouput level stays the same.
- Noise is fixable and dependent on the pc itself. This is a bit of a non-issue if you take care with your layout, components and settings.
- THD is pretty much the same as stock.
- The shunt regulator is just as close to the AK as the stock IC regulator. It's not 'external' I'd say.
if anyone is interested i stabilized lt1028 using progressively bigger fkp wima capacitors between the overcompensation pin and the output (soldered directly on the dip8 package)
330-470pf is more then enough
the sound is miles better comparing to a capacitor in the feedback loop but only a 22pf value in the feedback was enough to make it stable
330-470pf is more then enough
the sound is miles better comparing to a capacitor in the feedback loop but only a 22pf value in the feedback was enough to make it stable
Wow!
Andrea managed to start a new opamp thread at diyhifi (which hosts some people banned here) the 4th of February and has been banned the 5th...
A new world record? 😀
He also managed to set up another account here under a different name for all of 5 minutes, also on the 5th... just long enough to send some PM's before being banned.
Just a reflexion: Andrea talked about taste and replacing opamps. This is like talking about how good "surströmming" is to a person that either haven't tasted it nor will.
BTW: Surströmming is yummie, once a year at least
Surströmming - Wikipedia, the free encyclopedia
Surstromming--One of the World's Strangest Dishes
Surstrmming - fermented Baltic herring
BTW: Surströmming is yummie, once a year at least
Surströmming - Wikipedia, the free encyclopedia
Surstromming--One of the World's Strangest Dishes
Surstrmming - fermented Baltic herring