Dont neglect some facts about THAT340 chip before you run off buying these parts without some careful considerations. Their hfe is pretty low so you must consider carefully exactly in what type circuits they are usefull otherwise youll be only shooting yourself in the foot without even knowing it.
Mouser stocks quite a few parts from THAT Corp.
Mouser Electronics - Electronic Component Distributor that < http://www.mouser.com/Semiconductors/Transistors/_/N-2xpq5?Keyword=that&FS=True >
340P14-U THAT Transistors Bipolar (BJT)
Last edited:
Intersting reading regarding the Burson discrete op amp..
I'm perhaps thinking of trying one out.. Does anyone have any specs about these modules, particularly their input offset voltage?? What about their operating voltage,, the website says from +/-12V,, but how good will they work with only +/-9V ??
Ta
CM
I'm perhaps thinking of trying one out.. Does anyone have any specs about these modules, particularly their input offset voltage?? What about their operating voltage,, the website says from +/-12V,, but how good will they work with only +/-9V ??
Ta
CM
Ok so there is in fact huge different in THD with different Supplys. Easy to se 6 V is to low !
I haven't tested the Burson either, but why should I be disqualified from giving opinion? I have no doubt that the Burson will outperform an OPA627. I can say that even without having to hear the Burson. I have hundreds of opamps. The OPA627 is among the worst. I think I know why people think it is one of the best. Technically may be, but I don't care.
Everyone is free to give opinion. Opinions are useful. Any one of us make use of them once a while. Some opinions are accurate, some are not. So some of us can be really hard to make sure that opinions are given with high accuracy.
But what is accurate opinions anyway. You can measure the opamps and post the result. For some of us it would be useful, for some others it would still be useless.
Same with subjective opinions. You need to understand the capacity of the person giving the opinion to make sure that his opinion will be "in line" with yours.
If someone say that the X amp is the best sounding amp in the world, while he cannot even differentiate the sound of "no-opamp", then I will simply assume that X amp can be just an ordinary amp. It is our rights to do thing like this. Of course by not attacking others. But even if there were attacks, this is not a site for kids anyway.
Thanks Simon, that's great help!!
My application is built around -/+ 9V, but with a small mod and a bit of wiring, I can get +/-15V directly from the power supply..
Cheers.
CM
I sure the Burson will sound much better in that position...
...than any other circuit location that is actually in the audio signal path, swapping in for a competently selected monlithic
Last edited:
Yes, you are correct Radugazon, regarding my DCX
I want to experiment with replacing the LM4562's in the Didden i/o board with Burson Discretes..?? I would need to tap +/-15v straight from the power supply (Didden linear PS) for them to function properly..
I enjoy the remote volume too much these days to think about trafos anymore..
Ta
CM
Dear All, I want to share also in this thread my experience:
I changed in my deeply modified Luxman L-210 (yes, you can move this small amp to high-end) the IC opamp to Burson's dual Opamp as well.
Now this part of the Luxman is true high end as well !
However you have to take care that the Burson is embedded in the right electronic environment. This seems to be also in this Forum not always being realized and therefore Burson's potentials is not really exploited.
Acc. manufacturers information the Burson Single and Dual Opamp shall be operated between 12-25 V and min 19mA, but Burson informed me on my request that ideal supply is at 50 mA. In my Luxman I changed therefore in the phonostage (all caps already changed to top-end quality elko, films and micas) the zenerdiodes for stabilized voltage supply from 18V to 22V (higher voltage is normally better for sound ) and more important changing the resistor from 2,7K to 330ohm to increase current supply to ~ 50 mA. I also checked with ~ 30mA but with ~ 50mA 3-D image further improved. Generally the sound is fantastic, smooth "tube-like" trebles, new details from vinyl, you do not want to finish listening...breathtaking. A real IC killer but you must adjust the electronics around to take full advantage. ~ € 65,- for one dual opamp is then the cheapest highend investment ever !
(I want to mention that f.e. such a listening session the Luxman is powering a Precide Kithara LS and I have for A/B comparison f.e. my Airtight STM-1 tube, STudio Monitors and other gadgets...)
Cheers
Goetz
I changed in my deeply modified Luxman L-210 (yes, you can move this small amp to high-end
) the IC opamp to Burson's dual Opamp as well. Now this part of the Luxman is true high end as well !
However you have to take care that the Burson is embedded in the right electronic environment. This seems to be also in this Forum not always being realized and therefore Burson's potentials is not really exploited.
Acc. manufacturers information the Burson Single and Dual Opamp shall be operated between 12-25 V and min 19mA, but Burson informed me on my request that ideal supply is at 50 mA. In my Luxman I changed therefore in the phonostage (all caps already changed to top-end quality elko, films and micas) the zenerdiodes for stabilized voltage supply from 18V to 22V (higher voltage is normally better for sound ) and more important changing the resistor from 2,7K to 330ohm to increase current supply to ~ 50 mA. I also checked with ~ 30mA but with ~ 50mA 3-D image further improved. Generally the sound is fantastic, smooth "tube-like" trebles, new details from vinyl, you do not want to finish listening...breathtaking. A real IC killer but you must adjust the electronics around to take full advantage. ~ € 65,- for one dual opamp is then the cheapest highend investment ever !
(I want to mention that f.e. such a listening session the Luxman is powering a Precide Kithara LS and I have for A/B comparison f.e. my Airtight STM-1 tube, STudio Monitors and other gadgets...
)Cheers
Goetz
Last edited:
Strangely, I have selected for my first DIY the unambitious swap out of a TL072 op amp with the Burson (unplug/plug in) in a Keces HA-171 headphone amp. My first HA and I would like to see if a simple upgrade such as this will make a significant difference. I am not much of an audiophile and even less so an electronic expert, but really enjoy music and have over the last several years learned that quality equipment adds vastly to the pleasure.
As my second post, I will post my listening impressions from the viewpoint of only a technically challenged music lover. I hope you all will find it refreshing, albeit naive.
Cheers,
B
As my second post, I will post my listening impressions from the viewpoint of only a technically challenged music lover. I hope you all will find it refreshing, albeit naive.
Cheers,
B
Thanks for your feedback!!
I have 3 Burson dual IC's that I will install in my Didden active i/o..
Even just using them (briefly) with the available +/- 9v had a positive effect on SQ..
I am waiting delivery of a low noise mic-preamp power supply kit, capable for +/- 9 to 24volts @ 800mA..
Then I will modify the Burson adapter to be powered via this power supply instead of being powered via the Didden i/o board..
Someone posted THD+N graphs of the Burson Modules being powered at +/- 6, 18, 24 volts,, and interestingly enough, best (lowest) THD+N was +/-18v,, so I will set my supply to 18v
Cheers..
CM
I have 3 Burson dual IC's that I will install in my Didden active i/o..
Even just using them (briefly) with the available +/- 9v had a positive effect on SQ..
I am waiting delivery of a low noise mic-preamp power supply kit, capable for +/- 9 to 24volts @ 800mA..
Then I will modify the Burson adapter to be powered via this power supply instead of being powered via the Didden i/o board..
Someone posted THD+N graphs of the Burson Modules being powered at +/- 6, 18, 24 volts,, and interestingly enough, best (lowest) THD+N was +/-18v,, so I will set my supply to 18v
Cheers..
CM
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.