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Power and Output transformers for sale

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#42
About Mc transformers...

Thank you Karl.

I think - it's not a problame make 1:10 transformers...or 1:18...

Output imbedance make the input resistor (phono-stage).

Transformer may transforming resistence Impedance, Curent.Voltage, Power with differen (multi) according...

Low bass makes the the steel and quentity of waering.
High frequency- killing negative capacitance...

To overplay the Tango and Tamura - warening by theek cooper ware.
 
#43
I am look Dynaco

I am look for Dynaco clone.

I think it's able to make...

Single Ended 30W Output Transformer

Parameters is :
Single Ended Ultra-Linear HiFi output transformer. This transformer is rated at 30W and has a nominal primary impedance of 1.25k with secondary taps for 4,8, & 16ohms. Frequency response is 20Hz-20kHz +/- 0dB @ 30W. Recommended Max primary DC 225mA. Can also be set up for different primary impedances by changing loading on secondary taps. Other combinations are 625ohm primary with 4 and 8ohm outputs, 2.5k primary with 8 and 16ohm outputs, 5kohm primary with 16ohm output. Typically used for PSE 300B's, 2A3's, 6B4G's. Could also be used with 6C33 or quad PSE EL34's, 6L6GC's, KT66's, KT77's, etc
 
#45
Look for Philips TDA1541 and Sony CXD1244S

Look for Philips TDA1541 and Sony CXD1244S...

I can make a change.
I have 6s33s,6p45p(EL509),6p3s(6V6) and other Russian tubes/ all kind type core for transformers(Power,Output,input
with m=120000 and other)...

Give me You interest, hope - we find something union...

Thank you
 
#46
Hi nafanja

I would be interested in:
- 2 output trafos - PP 43% ultraliner for 2*EL34. That means 6600ohm between plates, 4/8 ohm output, 40-50W.

- power trafo - 230V input, outputs: 380V/400mA, 60V/100mA, 6.3V/5A with center, 6.3V/5A, 12-0-12V/1A

Can you please give me a price and shipping cost to Dubai, U.A.E.

Thanks
 
#47
Hi nafanja,

Sorry for a late answer but I travel a lot on business.
Thanks for an information - I think I will buy a transformers from you but I have to wait till I am back home.
Right now I am out of a country, should be back in a week

Just to make sure - can you send me a dimensions of your trafos ?
I have to think about a chassis.

Somehow your direct email server does not like my address and I cannot send a message directly.

Regards
 
#48
Hello Laszek

The dimentions I was send you.

If You touch with Fostex speakers, we can think about the change...
I have a plan to bould the speakers system with FE206, used may be for experiments, just need a good condition...

What do you think?
 
#54
Transformers for DAC

The DACs with TDA1541A? PCM63 and ither with curent out have a great sound if this DACs have a a good schems.

This schemes must be used with mirrors schemes.
I am prefer discret variants.

At the image 1.1 is the scheme.

This schemes get ability tohave the Zero at output ( groud) pins.
But it's need to have resistor no less than 1 - 1.5 kOhm.This resistor (after emiter, if it's a transistors) work with input capoacitance of amplifer or pre-amp.
This resistor with 2 Voltage and more with curent near 2 ma and (if it's a tube amp) 15 pF of tube IN will make the delay at the way between the two out pins.
It's the sweetch the cap near 220pF for compinsation the high impedance at high frequency. But this cap and 1-1.5 K resistor is bad for slew rate.
For that we can come by two ways
Use transistor for pluse the curent by emoter (for low impedanse, where is idealy may be 0, but realy 1-5-6-7 Ohm output impedance.
Variant two-
use the transformer.

This variant is at the image 2.1
After emoter dat is:
30 V, 1 Kohm, N=30:2
I = 20ma

Out data
2V RMS ,7Ohm, 0.3A
 

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#55
the next

This transformer for SE use is a toroid transformer.

But this transformer have PP secondary where in antifase is the resistir for the same curent like at emiter seconary.

This variant with amorph steel have 300H.
Deep bas and a very low frequency like good high freqiuency but which enough for filer 1 Mz and higher frequency for work with transistor amp.

The heght is near 4 sm and diameter is near 5sm with the ware.

The price is naer 70 USD without delivery.
 
#56
For SRRP phono stage

The transformer5s is can used in SRPP variant of phono-stage.

The 60 USD for amorph steel with 150 Henry.
It's better than Gensen for 60 USD

If You wish clear SE You can use SE/PP transformer which is higher.


The example is in the image.
 

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#58
I see some ways for realisation Your data (transformers).

Stabdart (classic) variant is make transformer with ear grap ,for SE.
But we must have 1500 and more (coil) cuper wihnding(s)
We must hove a very theng cuper (imeter) for realisaton this plan.
If we will compinsate 100-200-300 coil winding (cuper) bu thr tranformer irone core - we will have a big weight for hae optimal bass frequency.
The weght may be 20-40- kg for HIgh-End one transformer.
It's will be have a high price and big transprt fees (delivery)/

The selivery from Ukraine to France cost near 10 USD per 1 kg.
30-40 kg (60-80 kg) will be cost 600-800 USD totaly.

This variant we can talk.

But i sew second variant.
This variant is the making a toroidal without ear grap transformers .
This transformer is like Push Pull.
But the second primary is antifaze sections, loading for regulatied resistor for curent (Io) at 1 primary = Curent (Io) at 2 primary.

Dimention and weigh is will be mor smaller and lighter.

This variant is below.

But for High End, variant I am offer use amorph.
Amprph core have m = 90000...
It's may need near 120 w at the primary coil.
Bass frequency with 0db at 0.1 - 0.5 Hz.
B (inductance) = 0.5 Tesla
Hi fr will be 0bd up to 150-200 and more with a load.

We can make the winding om the si,ple core.
But some parameters will bwe simply.
 

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