[SpudHarris]

MikeW - the adapter you linked in your earlier post is for DIP8 chips. If you are getting 2 # AD797BRZ's You will need either 2 of these OR 1 of these and a steady hand for soldering.

The orientation is marked by a very small dot or circle at pin # 1 of the chip, this then corresponds with a dot or circle on the adapter also. If you look closley they are visible on the adapters I've linked. Just for clarity there are other adapters available apart from Browndogs (bit flimsy), These are the single units I get from e-bay and they are top quality.

 

[majkel]

There is a dot on top at pin 1. High input current bipolar op-amps aren't the best choice for I/V while they are great as output buffers, so the AD797 will be OK. Actually you'd better chosen a unity gain stable op-amp for I/V, too. The OPA827 fulfills both requirements and sounds nice.

 

[leaf]

I paid either US$49 or US$46, can't really recall, for 2 AD797BRZ to be mounted on these Single-to-dual Op-Amp Adapter (p/n 020302).

 

[leeperry]

BTW, a famous amp manufacturer just told me:
Quote:

The only difference between the AD797A-B version is, that the B-version has been slightly better input offset voltages and input offset currents. As a disadvantage the B-version has a worse PSRR. It might be, that in your amp A- and B-version sounds different because the B-Version is more effected by the quality of the power-supply.

they use A.

 

[ROBSCIX]

Quote:

Originally Posted by synth123 /img/forum/go_quote.gif So ROBSCIX do i understand this correctly the STX/ST will not support 797BR in the I/V positions (due to circuit design) but the 797BR in the buffer position will be ok (all with dual adapters of course) Thanks,

I never tested the AD797 in the I/V, only the buffer.

 

[MikeW]

Ouch that is really expensive. Soldering is no problem for me.

Quote:

Originally Posted by leaf /img/forum/go_quote.gif I paid either US$49 or US$46, can't really recall, for 2 AD797BRZ to be mounted on these Single-to-dual Op-Amp Adapter (p/n 020302).

So can anyone tell me what "Application" my amp is using this opamp for? Is it I/V or Buffer? What does it mean that the opamps are surrounded by transistors? Browndog only sells the adapters 5 at a time, guess i could use some spares.

That is interesting what you say about the a vs b version leeperry, would be alot less hassle for me to order dip-8 version of ad797. I already have a browndog for that.

the AD827 is the easiest solution. It's dual channel, and dip. Simple drop in replacement for me. Hmmm..

I really don't care for the sound of LME49680. I've switched back to my AD743JN's and enjoy them more. But i'd like a more focused faster, less fat sound then what 743's are giving me, but similiar signature. I like the high's to be airy but not overdone, and I feel like the LME49680 is seriously over doing them, the mid-range is a bit "off" too.

 

[kuben]

Maybe instead OPA827 i should choose OPA627?

 

[SpudHarris]

I prefer the OPA827 to the 627 by miles.

Anyone have experience of the AD845? I was just reading some Opamp Application stuff by Walt Jung and it's mentioned a few times......

 

[ROBSCIX]

Quote:

Originally Posted by kuben /img/forum/go_quote.gif Maybe instead OPA827 i should choose OPA627?

The 627 is opretty price in comparison to the OPA827. The OPA827 is still really new in comparison and many suggest it is just as good as the OPA627. If you want to go for the OPA627 your going to have to spend a bit of cash.

 

[kuben]

Any foughts about OP27AZ and AD8610BRZ?

 

[ROBSCIX]

The AD8610 is the single version of the AD8620 and many like that chip also for audio work. Actually many of the Analog Devices chops are well received.

 

[Kitarist]

anyone knows where to buy some kits

 

[SpudHarris]

What do you mean by Kits?

 

[K3cT]

I'm trying the LT1115 now and on the onset, it seems to have a great timbre. Not as blazing fast as the AD797 or ADA4627 though but this particular op-amp has a very nice ring to it. Perhaps it's because it's designed for audio application?

 

[SpudHarris]

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...