OP 07 vs TL061/71

[DavenPaget]

I recently noticed the 07 costs the same as the 61 ...
61 has a slew rate of 3.5V/us , 07 has a slew rate of 0.3V/us , which one is better ?
The 07 PSRR is 123db  

[CynicalMan]

The OP07 has less noise than the TL071, but to be honest, you won't notice the difference.

[merlinb]

61 has a slew rate of 3.5V/us , 07 has a slew rate of 0.3V/us , which one is better ?

071 has a slew rate of 13V/us, not 0.3V!
Not that it matters. Slew rate isn't an issue in a 9V circuit, so they're all pretty much equally good.

[Fuzz Aldryn]

61 has a slew rate of 3.5V/us , 07 has a slew rate of 0.3V/us , which one is better ?

071 has a slew rate of 13V/us, not 0.3V!
Not that it matters. Slew rate isn't an issue in a 9V circuit, so they're all pretty much equally good.

Be carefull: He meant the OP07 not the TL071! http://www.analog.com/static/imported-files/data_sheets/OP07.pdf 

[newfish]

The OP07 has less noise than the TL071, but to be honest, you won't notice the difference.

True...
I made a single Op-Amp OD Box a while back.  Socketed the OA, as I couldn't decide what to put in there, and there was very little difference between the TL061 and the OA27GPZ I tried - both were quite 'clean' for the same settings, compared to other OAs I tried...
The biggest difference was with an 'ordinary' 741 (gritty, in a good way), or the LM308N (which was immense!)
Cheers!

[DavenPaget]

Well i just wanted to know the slight differences between them two , except that the 061/71 is a JFET-input op .
I'd rather use 071 anyway , well i don't know why would some people want to use a 741 ._.

[newfish]

Well i just wanted to know the slight differences between them two , except that the 061/71 is a JFET-input op .
I'd rather use 071 anyway , well i don't know why would some people want to use a 741 ._.

The 061 / 071 (subjective adjectives warning) are more 'glassy' - lots of top-end.  Can be shrill without the correct taming (f/b loop cap).
There's not an awful lot of preceptible difference between the two - to my ears any how - YMMV.

The 741 has earned its stripes for me - despite being 'old' - or even 'archaic' - it still has a place for workable, 'Kalashnikov' O/D / Distortion pedals.
Easy to work with.  Easy to fix.  Easy to replace.

For what it's worth, the 061 / 071 boxes I built always had at least a 200pF cap in the f/b loop - otherwise it was *very* trebly.
Realising that this is just one factor affecting the overall circuit, this was true even for a D+ clone - I guess there's a reason the major manufacturers went from a 2-knob, to 3-knob design... ;-)

I ended up putting a 'bright' switch on my pedal, using a 470pF cap as 'standard', and patching in a 220pF in parallel to tame the top-end.

Do you have aschematic you're working on?

[oldschoolanalog]

I say swap & compare them in the circuit in question and use the one you've convinced yourself sounds best.
Also, total op amp noise calculation is MUCH more complex than any one parameter on a given datasheet. Too many variables to get into here.
Do some research on total noise calculation and you'll see...

[DavenPaget]

Well i just wanted to know the slight differences between them two , except that the 061/71 is a JFET-input op .
I'd rather use 071 anyway , well i don't know why would some people want to use a 741 ._.

The 061 / 071 (subjective adjectives warning) are more 'glassy' - lots of top-end.  Can be shrill without the correct taming (f/b loop cap).
There's not an awful lot of preceptible difference between the two - to my ears any how - YMMV.

The 741 has earned its stripes for me - despite being 'old' - or even 'archaic' - it still has a place for workable, 'Kalashnikov' O/D / Distortion pedals.
Easy to work with.  Easy to fix.  Easy to replace.

For what it's worth, the 061 / 071 boxes I built always had at least a 200pF cap in the f/b loop - otherwise it was *very* trebly.
Realising that this is just one factor affecting the overall circuit, this was true even for a D+ clone - I guess there's a reason the major manufacturers went from a 2-knob, to 3-knob design... ;-)

I ended up putting a 'bright' switch on my pedal, using a 470pF cap as 'standard', and patching in a 220pF in parallel to tame the top-end.

Do you have aschematic you're working on?

The 071 has a new home ! A TREBLE BOOSTER !

[DavenPaget]

I say swap & compare them in the circuit in question and use the one you've convinced yourself sounds best.
Also, total op amp noise calculation is MUCH more complex than any one parameter on a given datasheet. Too many variables to get into here.
Do some research on total noise calculation and you'll see...

Apologies ... not ordering any of those 61 / 07 .
The TI TL061 is twice the price of a TI OP07 . ( that means the TI OP07 has similar pricing with the ST TL071 )

[PRR]

> The TI TL061 is twice the price of a TI OP07

Sumthin not right there. The "major advance" of the TL07x was low-low-cost to make. The TL06x is a 1/4-size TL07x, costs even less per truck-load.

OP07 was, in its day, a fairly "high-cost" part. Elaborate circuit with wafer-trim (though I think '07x/'06x have some wafer-trim) and VERY low offset voltage. .

DigiKey is showing $0.62 for TI brand TL061, $0.80/ea for TI branded OP07, (in-stock, quantity 1, thru-hole). I'm not saying to buy there; service is good but handling charges favor projects bigger than a stompbox. Still, those prices look good for reference.

[DavenPaget]

> The TI TL061 is twice the price of a TI OP07

Sumthin not right there. The "major advance" of the TL07x was low-low-cost to make. The TL06x is a 1/4-size TL07x, costs even less per truck-load.

OP07 was, in its day, a fairly "high-cost" part. Elaborate circuit with wafer-trim (though I think '07x/'06x have some wafer-trim) and VERY low offset voltage. .

DigiKey is showing $0.62 for TI brand TL061, $0.80/ea for TI branded OP07, (in-stock, quantity 1, thru-hole). I'm not saying to buy there; service is good but handling charges favor projects bigger than a stompbox. Still, those prices look good for reference.

http://www.taydaelectronics.com/servlet/the-1218/Amplifier--dsh--Instrumentation%2C-Op-dsh-Amp/Detail < TL061
http://www.taydaelectronics.com/servlet/the-1215/Amplifier--dsh--Instrumentation%2C-Op-dsh-Amp/Detail < OP07
http://www.taydaelectronics.com/servlet/the-1220/Amplifier--dsh--Instrumentation%2C-Op-dsh-Amp/Detail < TL071