[Avro_Arrow]

Nope, that's a TL082BC.
 
The is no "BC" version for the TL2082
 
Quote:

 
 
Thank you very guys that was brilliant,  do you think that would be the later TLE 2082 as the TL082 is not made?  The DAC was made less than a month and it has LME 49990 in a XLR mode for balance?
 
 
Regards
 
Ecohifi

 

[ecohifi]

Quote:

Nope, that's a TL082BC.
 
The is no "BC" version for the TL2082
 

 
Good one Avro_Arrow, 
 
NAD must have had excess stock and are now using them to put in there latest Master Series DAC and Digital Amplifiers such as the M2 and 390D.   Its actually used to convert the XLR arrangement of the LME 49990 to single RCA!
The TL082BC is no longer available in most SOIC version nor are they available in PDIP, http://www.ti.com/product/tl082b
 
Love your quote bro, the things we do to get the best Audio goodness!

 

[danny93]

Hey guys...I just got myself some Ultrasone PRO900 and was wondering what opamps would pair nicely with it, I use a Titanium HD 
 
ATM I have:
 
OPA2134, OPA2111KP, LME49720NA ,AD797ANZ, LME49710
 
Would any of these be good for buffers or I/V?
 
Something that would bring out the mids a little would be good, and perhaps tame the highs...I hear they are rather bright cans 
 
Thanks

 

[FritzS]

look for LME49713HA
Output Current  RL = 150Ω, VS = ±18V ±100 mA, ±91 mA (min)

 

[ecclesand]

Quote:

0.1uF ceramic on each chip across pins 4 and 7.
Then a 10uF tantalum on the adapter.  I tried adding the film cap on the top of the adapter and only one chip seemed to benefit, so add it under the adapter board instead.
The tantalum is polar, so make sure that the negative end connects to pin 4 of the adapter, positive to pin 8.  I've never tried adding it backwards, I assume it will kill the cap and/or your opamps.

 
Does that also apply to dual channel opamps?

 

[danny93]

Quote:

look for LME49713HA
Output Current  RL = 150Ω, VS = ±18V ±100 mA, ±91 mA (min)

What would this have good synergy with...anything I listed I had?
 
Cheers mate 

 

[Mad Max]

Quote:

 
Does that also apply to dual channel opamps?

 
Of course.  Notice that the power supplies are pins 4 & 8 on a dual chip or 2x1 adapter.  4 & 7 on a single chip.
If you drop an opamp into some circuit and you won't be rolling it, then it is supposed to be a little better to bypass each power pin with one cap each (or any additional caps in parallel), with the other end of the cap(s) connecting to ground (not any floating ground).  But this is also supposed to depend on the quality of the ground, whatever that means.  =p

 

[ecclesand]

Quote:

 
Does that also apply to dual channel opamps?

 
Of course.  Notice that the power supplies are pins 4 & 8 on a dual chip or 2x1 adapter.  4 & 7 on a single chip.
If you drop an opamp into some circuit and you won't be rolling it, then it is supposed to be a little better to bypass each power pin with one cap each (or any additional caps in parallel), with the other end of the cap(s) connecting to ground (not any floating ground).  But this is also supposed to depend on the quality of the ground, whatever that means.  =p

Ah...I see...as long as the cap leads are connected to the V+ and V- it doesn't matter if single or dual. Thanks!

 

[ecohifi]

Quote:

look for LME49713HA
Output Current  RL = 150Ω, VS = ±18V ±100 mA, ±91 mA (min)

LME 49713 has a rediculous high slew rate, has anyone experience any instability issues especially when used for unity gain?

 

[proton56]

Yes,

It's it have oscillate in my set-up (strong noises), you have to install a 1.2k resistance between the pin 6 and 2 (see the data sheet p10)
and even with that, I suspect something wrong (very hight frequencies ?).

I have no oscilloscope, and I have stopped to use it.

The sound is good, better than lme49710, but not better than lme49990.

I prefer opa2211,1612, ada797 etc...

Generally I appreciate very low thd and good slew rate, I don't think it's ridiculous.
(like Jim Williams and others).


I suspect amp with low slew rate to be too sweet and can't have a good vibrato and grain with instrument like violin.

The amp with bad thd are veiled on the hight or coloured.

 

[proton56]

opa2111 is very good for the bass
lme49710 is very good for the highs

opa2111 + lme47910 is a good association, but you can find better

opa2134 is veiled on my set-up

ada797 can oscillate but can be very good for buffers or I/V (Weiss DAC etc..)
neutral / hight definition / very good ss / but grany sound and a little cold for someone

 

[Mad Max]

Quote:

LME 49713 has a rediculous high slew rate, has anyone experience any instability issues especially when used for unity gain?

 
That chip looks like it is probably very, very finicky.

 

[zilch0md]

Yeah, 1900 V/ms is a crazy high slew rate!
 
In this comparison I did of the slew rates for the OPA1611 (used in the Stepdance) and the OPA209 (used in the 2Stepdance), both slew rates are high enough to support ultra-sonic frequencies - and we are still only at double-digit slew rates, never mind three- or four-digit slew rates.
 

 
Mike

 

[Avro_Arrow]

I built a CMoy based on LT1363...it has a stupid fast slew rate and sounds wonderful.

 

[zilch0md]

Quote:

I built a CMoy based on LT1363...it has a stupid fast slew rate and sounds wonderful.

 
Nice.  I envy your having the satisfaction of building your own amp.  
 
Would you say the ultra-sonic (1000 V/ms) slew rate of the LT1363 played a factor in how nice the amp sounded, or just that the high slew rate didn't cause any audible problems?
 
Thanks,
 
Mike