Obviously you have not tried that...Upupa Epops said:
If you read this article by Walt Jung you can see that he mentions that one could draw some current from the output stage in an opamp to minimize any negative effects from the low biased output stage....
Why don´t you try it for yourself?
I used a constant current diode(which is a JFET and a resistor internally).
Tube_Dude said:
Jorge, even a well made LM317/337 will be silent enough to be used here, even with the direct biasing.
And yes, in some cases biasing to class-A does sound better, even with a resistor.
But at a higher biasing than the norm, as I said.
Anyway, look at the internal PSU for the analog stage of the AA dac I was talking about.
Independent regulation per channel, op-amp based.
This was not a cheap dac in it's time.
And notice that this dac had an unregulated external PSU, which I discarded and made a regulated one.
Attachments
The "pro" has a blind faith in the manufacturers (!)
Who said that?😕
Again, thread jacking.
Many of them YES, and I could point you many horrors I've seen inside commercial gear.
But this thread is not about that.
Upupa Epops said:
Who said that?😕
Again, thread jacking.
Upupa Epops said:
Many of them YES, and I could point you many horrors I've seen inside commercial gear.
But this thread is not about that.
Re: The "pro" has a blind faith in the manufacturers (!)
Here is the data sheet
I think Vishay make some silimilar one could use
I bought mine from Elfa here in sweden.AnthonyAsh said:
Here is the data sheet
I think Vishay make some silimilar one could use
OK,back to the thread again then...I say...AD823......carlosfm said:
Inside EVERY commercial equipment ? Are every profi designers in opposite to amateurs only idiots ? 😉
carlosfm said:
...
Upupa Epops said:
What?😕
It's official, you have some problem with understanding, or you are naturally stupid.
Carlos, to this simply words I understand very well. But I must say, that I see in crowd of amateurs much more of bad work than in crowd of profi designers.
Upupa Epops said:
Ok, but let me give you an example:
A (not cheap) Yamaha A/V receiver, with it's preouts taken from the power amp outputs.😱
Attenuated with big resistors and buffered with a single transistor.
Would this pass the mind of any amateur?
Jesus, sometimes I run to the bathroom when I open the lid of some gear.
Edit: nothing shocks me anymore.
Carlos, not all profi things are well made, you have thruth. But we know nothing about limits, which get his author from his " boss " 😉 .
Re: Re: Re: Just plugged in an AD826...
http://www.vectorelect.com/Catpdf/Page 71.pdf
Thanks
🙂
Now to find somewhere in the UK to buy one...
beerguy0 said:
http://www.vectorelect.com/Catpdf/Page 71.pdf
Thanks
🙂Now to find somewhere in the UK to buy one...
Re: Re: Re: Re: Just plugged in an AD826...
While you're at it, how about some places to buy these op-amps!?
Only one or two are available at Farnell. Maplin only stock industry standard boring ones. LM6172 is available from White Noise Audio but they charge £5 each - is that a lot? Plus there's the hassle of no basket ordering system.
I've got 2604 and 2132. I'd love to try LM6172 and some of the other favourites too!
IanAS said:
While you're at it, how about some places to buy these op-amps!?
Only one or two are available at Farnell. Maplin only stock industry standard boring ones. LM6172 is available from White Noise Audio but they charge £5 each - is that a lot? Plus there's the hassle of no basket ordering system.
I've got 2604 and 2132. I'd love to try LM6172 and some of the other favourites too!
Now to find somewhere in the UK to buy...
Seems that neiither CPC, Farnell, Rapid or RS do the Vector pad cutters 🙄
But RS do the LM6172 Dual OpAmp for £3.09 + VAT. Alas they don't do the LM6171 single. Which is not much use to me as I have no duals anywhere in anything.
I'm about to order from them would you like me to add one on for you? You can send me the money plus postage.
RS also do the OPA627 and 637 for £14.12 + vat.
But Yay 🙂 Farnell do the LM6171 for £2.95 + VAT. I shall be adding them to the next order 🙂
Seems that neiither CPC, Farnell, Rapid or RS do the Vector pad cutters 🙄
But RS do the LM6172 Dual OpAmp for £3.09 + VAT. Alas they don't do the LM6171 single. Which is not much use to me as I have no duals anywhere in anything.
I'm about to order from them would you like me to add one on for you? You can send me the money plus postage.
RS also do the OPA627 and 637 for £14.12 + vat.
But Yay 🙂 Farnell do the LM6171 for £2.95 + VAT. I shall be adding them to the next order 🙂
Re: Re: Re: Re: Just plugged in an AD826...
Addendum: I had to get a new one from our Engineering stockroom yesterday. Our stockroom clerk told me these things cost $60 US. They used to cost $12, but somewhere along the way took a giant price hike.
Cheers,
IanAS said:
http://www.vectorelect.com/Catpdf/Page 71.pdf
Thanks
Now to find somewhere in the UK to buy one...
Addendum: I had to get a new one from our Engineering stockroom yesterday. Our stockroom clerk told me these things cost $60 US. They used to cost $12, but somewhere along the way took a giant price hike.
Cheers,
Re: Re: Re: Re: Re: Just plugged in an AD826...
How dissapointing.
Thanks for the info.
beerguy0 said:
How dissapointing.
Thanks for the info.
Re: Now to find somewhere in the UK to buy...
Yeh, they *do* it, but wait till you go to the checkout and the price hugely jumps because it's a 'direct ship' item, incurring a MASSIVE shipping surcharge! 😡
IanAS said:
Yeh, they *do* it, but wait till you go to the checkout and the price hugely jumps because it's a 'direct ship' item, incurring a MASSIVE shipping surcharge! 😡
Re: Now to find somewhere in the UK to buy...
Yes please! I'd love to get my hands on a pair of LM6172s. I could pay you via Paypal, or whatever you like really, would be triffic... If you've not made the order yet. 😎
I'm right in thinking it's not easy to order from RS, that correct?
IanAS said:
Yes please! I'd love to get my hands on a pair of LM6172s. I could pay you via Paypal, or whatever you like really, would be triffic... If you've not made the order yet. 😎
I'm right in thinking it's not easy to order from RS, that correct?
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