Was the OPA1611 ever discussed as a front end candidate? I can't see why it wouldn't work very well.
https://www.ti.com/lit/ds/symlink/opa1611.pdf?ts=1698604068353&ref_url=https%3A%2F%2Fwww.google.com%2F
"rail-to-rail output swing to within 600 mV with a 2-kΩ load"
Although looks like 28V or so with +/-15V rails, according to figure 4... I must have missed something
Yep: +/- 18V. How is this able to be used on the front of the M2X (Tucson)
"rail-to-rail output swing to within 600 mV with a 2-kΩ load"
Although looks like 28V or so with +/-15V rails, according to figure 4... I must have missed something
Yep: +/- 18V. How is this able to be used on the front of the M2X (Tucson)
Here's the answer: https://www.diyaudio.com/community/threads/the-diyaudio-first-watt-m2x.321925/
1N4740A Zeners in place of Rs and 6K2 across VCC/ VEE, 0.1uF 50V bypass and 470uF 50V to stabilise
1N4740A Zeners in place of Rs and 6K2 across VCC/ VEE, 0.1uF 50V bypass and 470uF 50V to stabilise
short impression to opamp rolling: basic is OPA604
OPA551 -good low end, but not so good highs- sry but sound like class D
LT1793 - very dynamic and loves detail and highs -low end is better -clearer as 604-sound like its is faster and has a lower treshold....
cons:: a small plop after turn off----someone has some hints for me.....thx
greetings Harry
OPA551 -good low end, but not so good highs- sry but sound like class D
LT1793 - very dynamic and loves detail and highs -low end is better -clearer as 604-sound like its is faster and has a lower treshold....
cons:: a small plop after turn off----someone has some hints for me.....thx
greetings Harry
“OPA551 -good low end, but not so good highs- sry but sound like class D”
Been there.. 😉
Been there.. 😉
Too complicated.
There are 2 long tracks running from the rails via 2x Rs to the opamp.
You just need to cut them halfway, and solder 2x LM329 in between to drop 7V.
If you want another 2V drop, then solder another red LED (HLNP6000) in series.
They are both very low noise, so no need for extra caps.
Patrick
There are 2 long tracks running from the rails via 2x Rs to the opamp.
You just need to cut them halfway, and solder 2x LM329 in between to drop 7V.
If you want another 2V drop, then solder another red LED (HLNP6000) in series.
They are both very low noise, so no need for extra caps.
Patrick
thanks for you comment,
i have a lin. Power supply and can´t regulate, (trafo, CRC, got 23,25V idle @1,55A)
if the opamp is limited causing of his supply rail, e.g. +- 15V, I´m pretty sure that i can push the gate up to reach power limit, or not?-
have to measure an the bench within the next project PCB,.....
could be, that my opamp rolling idea is not worth it.......but I´m technican and audio fan 🙄
😉😀..love to play with
i have a lin. Power supply and can´t regulate, (trafo, CRC, got 23,25V idle @1,55A)
if the opamp is limited causing of his supply rail, e.g. +- 15V, I´m pretty sure that i can push the gate up to reach power limit, or not?-
have to measure an the bench within the next project PCB,.....
could be, that my opamp rolling idea is not worth it.......but I´m technican and audio fan 🙄
😉😀..love to play with