[K3cT]

Quote:

Originally Posted by SpudHarris /img/forum/go_quote.gif Hey Friend! I've ordered one of those from Farnell's but I can't get away from these AD797B's. The AD825 is also nice, to my ears at least...

Hi! I hope you're doing well with your op-amp experiments.

Man, I know what you mean but we are so obsessed with the AD797B we won't be able to appreciate a different kind of sound.

I have LT1115, LT1363 and TLE2141 to play around now. The AD825 is realllly good for the price it commends but seems to sound colored and a bit closed-in compared to the venerable AD797. The vocal is forward as well. It's definitely not as neutral as the 797 but man, it's a fun-sounding op-amp.

 

[12Bass]

Funny... just looked through my collection and found tubes of OPA2134s, OPA275s, LM4562s, AD825s, plus some others that I'll probably never use. Should probably have an op amp sale one of these days....

 

[ROBSCIX]

Ill take them. if your just giving them away

 

[12Bass]

Should have OPA1641/1642 on their way soon... with more adapters... and maybe a nice Chianti....

 

[ROBSCIX]

Quote:

Originally Posted by K3cT /img/forum/go_quote.gif Hi! I hope you're doing well with your op-amp experiments. Man, I know what you mean but we are so obsessed with the AD797B we won't be able to appreciate a different kind of sound. I have LT1115, LT1363 and TLE2141 to play around now. The AD825 is realllly good for the price it commends but seems to sound colored and a bit closed-in compared to the venerable AD797. The vocal is forward as well. It's definitely not as neutral as the 797 but man, it's a fun-sounding op-amp.

Well that's the point IMO, some opamps will sound neutral while others may provide aspects you find enjoyable. If that is the case then who is to say you are wrong?
AFAIAC, if it sounds good to your ears then it is good. YMMV.

 

[K3cT]

Rob, of course you're correct but my desire to experiment is above all I think.

BTW, have you tried the 4627-1? What do you think of them?

 

[SpudHarris]

OP42AJ - These are expensive, has anyone got experience with them? Nice to find one I've never heard of. Described as ''Top Grade High Speed'' Opamp.

 

[ROBSCIX]

Quote:

Originally Posted by K3cT /img/forum/go_quote.gif Rob, of course you're correct but my desire to experiment is above all I think. BTW, have you tried the 4627-1? What do you think of them?

I haven't got around to try them as of yet. Maybe I will sit down tommorow and build some units I have a stack of opamps sent to me by associates for my testing.

 

[leeperry]

hummm, I'd like to get a HP amp that's compatible w/ AD797B/LT1028A right off the bat..something dead simple: 2 RCA in>1 HP out, but apparently LT1028 is a lost cause w/o an oscilloscope and a proper design: Cmoy headphone amp? - diyAudio

and tubes get hot as hell and are also a pain to roll...discrete is the only way I'm afraid

 

[ROBSCIX]

Quote:

Originally Posted by SpudHarris /img/forum/go_quote.gif OP42AJ - These are expensive, has anyone got experience with them? Nice to find one I've never heard of. Described as ''Top Grade High Speed'' Opamp.

High speed can be an issue, espeically if you are unsure on how to stabalize them. Not saying they will be a problem, just high speed opamps can be quite touchy in many circuits. If you try them out let us know how it goes.

 

[itszdenny]

I am currently at a loss

.

I have multiple 8-msop and 8-soic op amps that I am looking for adapters for. I understand that some op amps are dual channel while some are single. For audio purposes, do I need to strictly use dual channel adapters, or this depends on the device I will be using the op amp in?

 

[SpudHarris]

Like you say it will depend on the device. Why not tell us more about the device you are intending to use them in and which opamps you have and we can steer you in the right direction.

 

[ecclesand]

Has anyone ever swapped out an AD841 (14DIP) with an 8DIP opamp in the I/V stage of a DAC? I have a Parasound 800 DAC that I recently received and it uses the AD841 as I/V. I compared the pins on the AD841 to other 8DIP opamps and the pins match up with the remaining 6 pins on the AD841 not being used.

 

[ROBSCIX]

Sounds like a quad opamp. They are just using the amps they want and leaving the others unused. If I am understanding you right.

Provided the pin outs are the same, you can swap them out with dual channel version if you want.

 

[ecclesand]

Quote:

Originally Posted by ROBSCIX /img/forum/go_quote.gif Sounds like a quad opamp. They are just using the amps they want and leaving the others unused. If I am understanding you right. Provided the pin outs are the same, you can swap them out with dual channel version if you want.

Thanks, Rob but it is actually just a single opamp but in a 14DIP package. It's soldered directly to the board and I wanted to see if anyone had successfully swapped one out for a single channel DIP8 opamp. I most likely will destroy both AD841s when I desolder them and they are hard to find in small quantities.