The Opamp thread

[theory_87]

Spud, what buffer are you using in the last pic?

Currently using Signetics NE5534AN OBCA with 4* HA5002 and 2* buf634 on my mad dog fi.quest. Prefer ne5534 to muse01 & muse02 atm

 

[SpudHarris]

They are LME49600's. An absolute pain to fit in the standard DIP sockets. I bought some off eBay but they didn't fit so with the help of HiFlight I managed to make adapters...

 

[theory_87]

I can imagine it a pita to for those in.

 

[SpudHarris]

Got A couple of AD797BRZ's sorted last night with great results. Imaging and soundstage seem greatly improved. The caps were from a stash that came with some pcb's I bought a few years back. Still not 100% proficient soldering those tiny ceramics...

 

[SpudHarris]

Spud, what buffer are you using in the last pic?

Currently using Signetics NE5534AN OBCA with 4* HA5002 and 2* buf634 on my mad dog fi.quest. Prefer ne5534 to muse01 & muse02 atm

Are there more than one make of NE5534AN?

 

[theory_87]

Yup. I know Phillips bought over Signetics, and there is JRC and TI who make them too. Signetics ne5534/5532 made in the 80s are the best sounding version and may be one of the best sounding opamp ever according to most including Dr. Xin. The one I had are made in 1983

 

[SpudHarris]

Are your OBCA adapters for the 5534's the same as this? I made these years ago for AD744's.... Been on the OpAmp rolling/modding wagon for a while
 

 

[theory_87]

Are your OBCA adapters for the 5534's the same as this? I made these years ago for AD744's.... Been on the OpAmp rolling/modding wagon for a while
 

i cut the leg and solder the resistor direct to the opamp. But you can use the adapter for ad744 for ne5534 since their pinout is the same.

 

[SpudHarris]

Awaiting delivery of a pair of 1982 made Signetics NE5534AN to try out

 

[theory_87]

Awaiting delivery of a pair of 1982 made Signetics NE5534AN to try out

will like to know how you think about it

 

[SpudHarris]

Still waiting on my 1982 5534AN's but a couple of others arrived today... One of them is Raytheon! Never had a chip marked with this, only tubes.



If the 1982 made OpAmps are better than these, I am going to be very, very happy. I am amazed how great these sound, I will be auditioning all evening. This is one of those very rare occasions where something great doesn't cost the earth.

Thanks theory_87

 

[BucketInABucket]

Any idea what kind of op-amp can replace the LME49710s in this circuit? So far, LME49990s are proven to work. Thanks!

 

[OJNeg]

Love the collection Spud. Head-Fi needs guys like you.

 

[theory_87]

Still waiting on my 1982 5534AN's but a couple of others arrived today... One of them is Raytheon! Never had a chip marked with this, only tubes.



If the 1982 made OpAmps are better than these, I am going to be very, very happy. I am amazed how great these sound, I will be auditioning all evening. This is one of those very rare occasions where something great doesn't cost the earth.

Thanks theory_87

glad to be of help. I never imagine i will prefer ne5534 over muse01/02 considering the price difference. Will be interesting to hear your opinions on the different make ne5534 since i never try other makes ne5534.

 

[pelopidas]

Can you describe the difference between the muses and 5534? Also, how do the 5534 compare to 49990 or other common opamps.
 
I have not yet had the chance to listen to a 5534 and am now curious