Power and Output transformers for sale

[dukekiong]

Hi nafanja,

i have a custom toroidal power trans and a couple of chokes made.

toroidal power trans:
primary - 115x2 50Hz/60Hz
secondaries - 0-240V @ 0.2A + 0-18V @ 1.0A + 0-18V @ 1.0A + 0-18V @ 1.0A + 0-7V @ 2.0A
roughly 116VA


tube amp supply choke
10H @ 100ma (1 required)
20H @ 50ma (2 required)
what cores do you recommend for chokes for best peformance/efficiency?

please give me a quote and it would be great if you can also provide me with the dimensions and weight of the transformers.

Thank you,

XianYang

[nafanja]

About 6n6p

I am sending here the datasheet for this tube.

[nafanja]

Here is datasheet with mid point -2V.


Io = 30ma (60 ma- double triod)
I min = 22.5 ma,I max = 37.5 ma
Delta I = 15ma (Double = 30ma)
E anode = 120 V
Va min = 100V, Va max = 140V
Delta V = 40V
Ra = 40/15ma(30) = 2666 (1333) Ohm
This tube good for use the interstage transformers in anode or cathode

[nafanja]

If you need the batery it's 3V (like example)
Datasheet is ina pic below.

[Colescuttle]

Hi, Ilja:

Any developments on the 300VA little variant transformers you were looking into for me?

George

[nafanja]

You ask about feeding (filament).
You can make it as a constant and alternating current.
This lamp needs 6.3 V. 750 mA.
This lamp works well with alternating background and a signal will have no effect if you ask about it.
But the better course, if any lamp, glow voltage accurately detect and even better - to stabilize.
But at least on the program 6.3 volts - this is well enough.



As I understand, after DAC faces pass capacitors, why?

Then you need to understand what sound you want - or what most of this comes out of DAC or you like the sound of “high-coloured“.

Any capacitors or transformers bring your color or affect the microdynamic. Capacitors influence negatively at the microdynamic and even more if we speak about ideal transformer.

For example, if the capacitors in the frequency buffer, made by the phase distortion going on background, which means feeling of space will maximally close to what comes out of DAC. The feeling of the scene will be more naturally, or as they say the sound away from the speakers ...

If you apply the TDA1541, then you may have a resistor, and cascades of tubes without passing capacitors ... This chip is able to work with the resistor at the output.

If you use AD1862 or similar, it is better to use a chip and tube .Because chip at the output will be resist between the land and yield, it can easily apply for the removal of battery. As shown - it is cheaper and it is cleaner for the sound, does not require the use of any special resistors, etc.

[nafanja]

For then your amp will work as an amplifier of permanent nature, and thus will have the widest possible bandwidth that by using modern acoustic systems - it is completely acceptable.

At the exit is Jensen. Instead you can try my amorph core.

If you dwell on that, to use a chip for it with the tube transformer, given that AD, OPA cheap, though will require additional capacitors, but I think that the diodes and capacitors Nichicon are cheap.
For the money that I propose to use for the power supply, you can put additional sections for power circuits, taking into account stabilization.

Regarding the transformer, I do not recommend use of small transformers, since you plan to use dual triode that in sense correct in terms of high frequency and speed growth of the slew rate.

[nafanja]

If you want to have a cathode folover, it can be a transformer with n = 1:1 used katode. Transformator will have about 100 Henry. What provides almost 0 Hz lower.
Upper bound around 150-200 Hz at 0 db.
However, it should be smartly connected.
If you approve this option, I will tell what to do…

What about power supply, I would recommend a LC filter.
If this is the CRC, then for the C3 put a low resistance of 1 to 22 ohms.
Capacitors have a charge at the time of release current. This resistor will help mitigate these emissions. It's like a tube diode, because of its resistance to such an effect occurs.
With regard to coal capacitors, you can put inductionless coal from Soviet military. The only thing , unlike Ricken Ohm they need to be warmed up, ie they should “play them self into” (warm up) in the system until the time when coal cristallise.

With respect to the rectifier, it is better to put diodes or Shotki but zashuntiruy their konzhensatorami small-capacity test. The sound will be softer. Npominayuschy diode rectifier.

[nafanja]

Originally posted by dukekiong
Hi nafanja,

i have a custom toroidal power trans and a couple of chokes made.

toroidal power trans:
primary - 115x2 50Hz/60Hz
secondaries - 0-240V @ 0.2A + 0-18V @ 1.0A + 0-18V @ 1.0A + 0-18V @ 1.0A + 0-7V @ 2.0A
roughly 116VA


tube amp supply choke
10H @ 100ma (1 required)
20H @ 50ma (2 required)
what cores do you recommend for chokes for best peformance/efficiency?

please give me a quote and it would be great if you can also provide me with the dimensions and weight of the transformers.

Thank you,

XianYang

XianYang
Hallo XianYang,

your question will be answered in 1-2 days

[Predator864]

http://www.bonavolta.ch/hobby/en/audio/6c33c_3.htm

Costs for 2 output transformers ?

Without airgap.