Correct.
Somehow the one that I used and listed in the BoM for the GB becomes obsolete at Mouser.
This is probably the updated part number for essentially the same cap.
Thx,
Patrick
Somehow the one that I used and listed in the BoM for the GB becomes obsolete at Mouser.
This is probably the updated part number for essentially the same cap.
Thx,
Patrick
Please refer to my answer at the Super Linear GB thread about BoM.
Thank you for your patience,
Patrick
Thank you for your patience,
Patrick
By pure change, I bumped into an old thread at DIYA today about a non-comforming notice from TI.
OPA2604 is dead
The OPA2604 can no longer support +/-24V as per datasheet.
In fact TI has probably taken it off their product line completely.
Therefore, should you wish to build the +/-24V version of the SHPP, the only remaining opamp choice is the ADA4522-2.
Since one practically cannot get the 2604 anyhow, I guess it has not been a real problem.
In any case please take note.
Patrick
OPA2604 is dead
The OPA2604 can no longer support +/-24V as per datasheet.
In fact TI has probably taken it off their product line completely.
Therefore, should you wish to build the +/-24V version of the SHPP, the only remaining opamp choice is the ADA4522-2.
Since one practically cannot get the 2604 anyhow, I guess it has not been a real problem.
In any case please take note.
Patrick
This is an old thread that needed re-opening.
But a couple of updates is due because of the latest SL HPA GB, though the information is not new.
https://www.diyaudio.com/community/...ear-headphone-amp-pcb-set.399425/post-7388742
As mentioned also in post #29:
https://www.diyaudio.com/community/...adphone-protection.292681/page-2#post-5213493
A R20 has been added to the PCB so as to turn a 24V relay coil into a (for example) 30V equivalent.
With 6V extra to play with, one can also replace R20 with a resistor + a LED.
Fr completeness, I added here a revised schematics with R20 added.
There is nothing new compared to that posted before, except for that.
Also for +/-15V applications, a couple of alternative components can also be considered.
IC1 -- Any JFET input dual opamp in SOIC8 and +/-15V will do, e.g. OPA1642 ir OPA2145
Q1~5 -- I have been using Toshiba 2SC3324/2SA1312, but now replaced by 2SC2713/2SA1163, in BL grade.
Patrick
But a couple of updates is due because of the latest SL HPA GB, though the information is not new.
https://www.diyaudio.com/community/...ear-headphone-amp-pcb-set.399425/post-7388742
As mentioned also in post #29:
https://www.diyaudio.com/community/...adphone-protection.292681/page-2#post-5213493
A R20 has been added to the PCB so as to turn a 24V relay coil into a (for example) 30V equivalent.
With 6V extra to play with, one can also replace R20 with a resistor + a LED.
Fr completeness, I added here a revised schematics with R20 added.
There is nothing new compared to that posted before, except for that.
Also for +/-15V applications, a couple of alternative components can also be considered.
IC1 -- Any JFET input dual opamp in SOIC8 and +/-15V will do, e.g. OPA1642 ir OPA2145
Q1~5 -- I have been using Toshiba 2SC3324/2SA1312, but now replaced by 2SC2713/2SA1163, in BL grade.
Patrick
Great protection, built a few myself, thanks Patrick for sharing, you can go wrong with this one…
sB
sB