The Best tube/valve sound!?

[DF96]

tinitus:
If you feed a single HT supply through a bifilar choke to two loads then you have two choices:
1. currents aiding, so get core saturation and little or no choke action,
2. currents cancelling, so good choke action so any noise generated in one load gets transferred across to the other load.

Which of these were you thinking of?

PS posts coincided, but my point stillstands

 

[Merlinb]

Why would you need positive feedback on DC and low frequencies?

For the fun of it
Tetra Sans PS & Quatrode-2 Circlotron

 

[tinitus]

..... any noise generated in one load gets transferred across to the other load.

does it matter ?
its just left and right channel
shouldn't noise be the same in both anyway ?

 

[DF96]

Noise is never the same. If it's the same it isn't noise but interference.

Better results would come from two separate smoothing chokes. Coupled chokes (otherwise known as transformers) are best used only when they actually do what is required.

 

[TonyTecson]

my version of brosike CCDA, took me about 4hours to complete...

 

[Gost22]

Hi Tony!
By all that you're doing this pre-amplifier?
How does it sound?

 

[TonyTecson]

Hi Tony!
By all that you're doing this pre-amplifier?
How does it sound?

i probably built around 2 dozens of these.....i have lots of friends who liked this line amp.....this is the latest version, 2 sets of inputs 1 set of outputs......this line amp seems to tolerate a lot of tube types, like the 6BK7, 6BQ7's....etc....

how it sounds? very satisfying...... and very quiet too, no hums, no hiss....

 

[Gost22]

Tony, where is the schematic?

 

[TonyTecson]

Tony, where is the schematic?

post #5

 

[Gost22]

Hi
I'll make another power supply with LM317 and MJE340 and other components. With these power supply reduce noise to a minimum.
Will present these days schematic for power supply.

 

[djn]

I have the Pete Millete Low Mu pre amp and think it is the best I've ever heard. I auditioned it for 20 audiophiles and to a man they thought the same. Here is the link. I only use one input/output on mine.

Low-mu preamp

.

 

[tinitus]

I have the Pete Millete Low Mu pre amp ...

always a pleasure to look at that one, pure artwork

and Im sure its good, but EL34 and 6AS7 in a preamp....?

 

[djn]

the EL34 are just for the CCS. No signal goes through them. I always wanted to get PCBs made up to for something to do. I was thinking this might be the project to do that with.

 

[smbrown]

By the way, speaking of the CCDA design, you'll find it looks familiar to this old Audio Note M7 line stage. I've built this a couple times, very nice sound.

http://www.drtube.com/schematics/an/m7.gif

 

[tinitus]

I would have thought Audio Note would be SRPP design ?

 

[vinylkid58]

I would have thought Audio Note would be SRPP design ?

Why's that?

jeff

 

[tinitus]

as I recal it, they have always talked highly of SRPP, since the days of Erik Anderson
but maybe thats history now

 

[TonyTecson]

Hi
I'll make another power supply with LM317 and MJE340 and other components. With these power supply reduce noise to a minimum.
Will present these days schematic for power supply.

the key here is to bias the filaments with dc voltage anywhere from 1/4 B+ and higher.....i have resisted the use of voltage regulators, i use massive capacitor filtering instead...

 

[TonyTecson]

as I recal it, they have always talked highly of SRPP, since the days of Erik Anderson
but maybe thats history now

as for me, even the most basic of tube circuit can sound good.....and high transconductance tubes are the go to tubes, unlike the much venerated 6SN7's you do not need high voltages to makes these babies sing...

 

[vinylkid58]

as I recal it, they have always talked highly of SRPP, since the days of Erik Anderson
but maybe thats history now

Well it may be history now, but I'm wondering how much influence their views/designs has had on other manufacturers, regarding recent Chinese amplifiers with SRPP front ends?

jeff