Burson V4 mod

[The Chief]

 
Hi
I´m doing some research for Heating for direct triodes. I have a VCCS that has a comperator. I had the Idea to replace it with an Op Amp. So I found Burson V4 and tried that instead of the comperator with astonishing sonic results. The only way to top that result was tu replace the resistors of the op amp with one of my favourite resistors. Rhopoint GG102. (You might also try Texas Components TX2575) These two resistors types  have beaten every other type of resistor yet I´ve tried. I feel, all conventional resistors, carbons , metall film ect steal high frequencies and high frequency dynamics. With these resistors, the result sounds opener and more holographic. You don´t even have to use bypass caps in your cirquit. They never can replace, what other parts steal.
Now, a burson Op Amp sounds good, but with GG102 instead, the sound gets mor open and more holographic. And it´s also very important, in which direction the resistors are soldered in!  I wonder what happens, if you put this into an Audio cirquit; as mentioned, I have made my hundreds of listening tests with op amps as comparator...

 

[dhruvmeena96]

Use rhopoint hc, hd ultra high precision resistor with tolerance of 0.005%

 

[The Chief]

At my opinion, the tolerance , as impressing a tolerance of 0,005 may be, is not hearable.
It´s the same as in Fender guitar amps, there are tolerances up to 10 or 20% in the resistors. The sonic difference is tiny, if hearable at all. What makes the difference, is the sound of the pats itselve and the direction of soldering. I can hear the sonic difference in resistor direction with any resistor, no matter if it´s inside a a fender amp or a hifi cirquit. By the way, the GG102 are available in very low tolerances as well...
So did you ever make a listening comparison between your suggested resistors and DR102 and GG102? It might be of interest... I´m curious to listen...

 

[dhruvmeena96]

I got my liquid helium cooled resistor (120days) set back

Comparision would be on agdrcmoy custom with the following resistors

gg102A(cyro treated)
gg102A
Tx2575(cyro)
Tx2575
Tx2353(cyro)
Tx2353
Rhopoint HG

A local maker here to mention

Songbird pro resist(local)


gg102A cyro took away hard sound, and increase the soundstage to to be more spherical.
Got the sound to be more deep and instruments got clear

Gg102A sounded in head and hard plus warmish

Tx2575 went harsh and accurate, too clinical after treatment

Tx2353 got opened up like hell.....but it was all about soundstage....everyting else was same

Rhopoint HG was crazy awesome in beginning, got better afyer warmup but after cyro it became more like gg102A but with a little more resolution.


Songbird made resolution to best but all thing got ****ty

 

[The Chief]

very interesting indeed... so cryo seems to be cool, in a double sense... thanks for that hints...

 

[dhruvmeena96]

Tx2575 after cyro and burn in 8hrs

Actually i threw 30 of these in cyro and when i was testing earlier, it got one damaged and it got its resistor noise higher

My idea behind burning was electrons finds easiest way to move in a loop.

In supercool situation, atoms try to realign as the item mass shrinks, they get compressed and try to fit themselves in order

When we dip them in liquid nitrogen itself for days to actually make atom feel like they are normally like this.

When we slowly get them in ideal temps....slowly means very slowly

There reallignment doesnt get changed by lot.

Physically it helps in filling cracks which acts as capacitance and varied resistivity at certain points.

Crystally there 30% improvement in lowering inductance

Hence lowering the noise.

Now what is behind burning

Electron moves in easiest track, so as temps increase, movement increase and resistivity increase.. This leads to self done defect and desirable realignment by heat.

White noise was used at very low volume 30%

It creates loosing defect so that it can create some ease of burning...all frequency attack at same power at same time which makes the reallignment of crystall structure according to pink frequency. When we use pink noise, we sweep the circuitry with log sounds, which is most natural way of sound for us, breaks it as our brain perceive.

White noise should always for 3hrs and extend pink noise for as much as you want

*note: these methods works for only alloys, as pure metals will not get affected by this as even if you cool them and get it to normal temps, only cracks are filled, and sometimes can increase noise due to damage.

Tx2575 sound is very very large and clean. It worth more than any caps you can replace...

I will compare it same effect as mundorf supreme evo silver gold.oil but at very cheap price.

This makes it far cheaper than my exotic desktop amp and now my portable amp outshines everything

 

[The Chief]

Here´s the latest update.
 
 
See the difference to the photo at the top of this thread. Now, as I new the directions of each resistor, I could do a little better soldering job; now,  the resistors are on their right place, although it was not easy to place them all to the pcb. I know, there are lot of people out there, who can do better, but I´m the first man on the planet who did this. Look at the trim; it´s not original. It´s a Texas components 1240W. This trim sounds so much opener than the original trim. (ok, it´s much more expensive, and it´s a preccision trim.)
But it´s really woth a try. You also might try a Texas Components 1260W, which sounds a very little softer and I still don´t know if they sound the same after burn in. The 1260 has pins inline, so I can´t apply it to this pcb...But I think, the 1240W is the most open sounding trim I´ve ever heard. Sound like 2 bits more resolution.... (I know, it analog.) Please don´t forget, if you turn only one of the resisstors, the `magic`of the sound disappears) and NO, I won´t publish the direction scheme here! But I gave it to someone, who deserves it...
And in whole, the combination of Rhopoint resistors and trim, you have a most open sounding op amp and for my application, the difference to the original is bigger than between V4 and V5... Of course , it´s always a matter of taste, but I´m happy that I´ve tried.
A member of this forum here  told about Rhopoind hd resistors. I´d love to try them also, but I ran out of money, so the story must end here. (but who knows, miracles can happen...)

 

[The Chief]

Hi  dhruvmeena96
could you give me your email adress? It´s about the HD resistors... to Saxophonschulte@gmx.de