| nafanja |
I have a factory for make the transformers
Power Trans with your parameters including amorphe steel cores.
Output transformers, mid and input Push-Pull,SRPP including 1500-2500 Henry amorph steel ,SE - toroidal or w-core.
We may doscuss the price, parameters calculation and other.
time for making and delivery.
Good quality and good price.
Ask me. |
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| wckong |
Hi nafanja,
Would you kindly quote the price of: One Toroidal Power Transformer
Primary 220v, Secondary 0-9v, 0-9v, 12v-0-12v
80VA
Shipping to Hong Kong
Thanks |
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| Cal Weldon |
Moved to vendors area. Don't forget to donate to this site to help keep it running.
Thank you. |
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| nafanja |
At setuday I will give You now baout information about transformers.
Tell me plaese how many transwormers do You planing?
Regards ILja |
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| nafanja |
If You weesh 100W toroid it will be 30 USD
I have variant
1) W-core 40W 9-0-9V
2) W-core 40W 12-0-12
This two transformers cost 25 USD |
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| david maurer |
I am looking for a power supply transformer for a bass amplifier. It needs a 120 volt 7 amp primary with two center tapped secondaries. One center tapped secondary for +60 volts and -60 volts ranted at 100 watts into a 8 ohm load. And the second one centered tapped for +85 and -85 volts rated at 300 watts into a 4 ohm load. I need only one transformer. What would my cost be. Please indicate shipping cost also. I live in Michigan at a 48383 zip code. No hurry on the delivery, and the least expensive ground delivery transport available is fine. Thanks,
Dave:cool: |
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| nafanja |
Need a replacement transformer Post #6
I am looking for a power supply transformer for a bass amplifier. It needs a 120 volt 7 amp primary with two center tapped secondaries. One center tapped secondary for +60 volts and -60 volts ranted at 100 watts into a 8 ohm load. And the second one centered tapped for +85 and -85 volts rated at 300 watts into a 4 ohm load. I need only one transformer. What would my cost be. Please indicate shipping cost also. I live in Michigan at a 48383 zip code. No hurry on the delivery, and the least expensive ground delivery transport available is fine. Thanks,
Let's make more datailing.
We need calculated the power:
1)Two outputs 60-0-60 (100W), the curent os 100/120V(60+60)=0,83 A
2) Two outputs 85-0-85 300W/170 = 1,76 A
3) Total Power 100W+300W = 400W
4) 400W/120V = 3.3 A
What kind of amplifear do you built.
For bass-combo (music) or for hi-fi, high-end amp?
A ask you for what kind of inductance we may calculate.
For low class many forms put 0,8 Tesla
For high-class and speed and attack curent rate and minimilise distortion which will go to a signal way I put 0,4-0,5 Tesla?
What your looking? |
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| nafanja |
| How many gabarites you may use for builting this transformers? |
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| david maurer |
Hello Nafanja,
David Maurer here. I am responding to post number 6. The trnsformer would be for a bass guitar amplifier. Frequency respoonse range would be from 20 hz to about 8 Khz. Thanks, Davd:cool: |
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| nafanja |
It's w-core for sell.
PP,SE and other...
Also I sell toroidal 1kW and more transfpormer. |
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| ACD |
nafanja;
You got email ;) |
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| nafanja |
| This is a special toroid transformer where wrte "1500 Henry". |
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| nafanja |
Personal order.
You can notice You parameters. |
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| ventle |
Hi, I'm looking for a toroidal transformer with the following specs:
- dual primary 115 Volt coils (so it can work on both 115 and 230 volt input voltage - coils connected in parallell for 115 Volts, coils in series for 230 volts)
two different centertapped secondary coils:
- Secondary output voltage 1 48-0-48 Volts
- Secondary output voltage 2 12-0-12 Volts
- power rating at least 1000 VA (preferrably around 1200, but 1000 should work fine as well).
What would it cost to buy one of these from you, including shipping to Norway?
thanks,
Helge |
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| nafanja |
Transformer with 1200 W and
10 A in secondary sections is will bw 120 USD |
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| nafanja |
The delivery is 10 USD for 1 kg by Post of Ukraine
The payment via WebMoney |
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| c.d.s. |
hello,
looking for the following.
120v input 500va 0-25 x2 for a solid state amp design
thank you
Carl |
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| nafanja |
You need
1) 120V-500VA
2)12V
3)12V
I am write? |
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| c.d.s. |
sorry,
looked a little more into the schematic im building and I think I need this.
500VA, 2 x 27-0-27Vrms 120v input.
so 2 centertapped windings please. I would like to avoid a torroid style
;)
best regards
Carl |
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| nafanja |
It's will be
500 VA
1)120V
2) 27V (27-0-27)
3) 27V
4) 27V (27-0-27)
5) 27V
500VA/2 = 250VA/(27V*2) = 2,22 A
I will no sharply at Monday the price.
But I think - it's will be near 60 USD (without shipping). |
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| c.d.s. |
fantastic! :cool: just what i've been looking for :D
what type of transformer? I would prefer again it not be a torroid.
please email me at cdswan-at-google.com with payment details.
best regards
Carl |
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| nafanja |
Tell me plaese, what is
cdswan-at-google.com
?
You would like that I am mail at this.;)
I will give w-core tranformer.
Output transformer you will see at larg picture.
About payment here
http://tube-fun.narod.ru/business1.html |
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| c.d.s. |
-at- = @
this is so no programs that troll for emails off of forums get my email!
You can email me direct the total on Monday. then to arrange shipping yes?
Cores:
Excuse my ignorance, but I know C, R, E, and torroidal styles, Im not familiar with
W core... javascript:smilie(':(') are the first images you shown W core? is W the same as E?
best regards
carl
:( |
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| nafanja |
Hi
It's like E, but this make from four like U core...
(I don't know american standart). |
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| c.d.s. |
thank you. any images of w-core close up?
regards
carl |
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| c.d.s. |
E is good :) unless W is better? You tell me please.
thank you for taking the time to answer all my questions.
best regards
cds |
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| nafanja |
If use what I named like w-core,
it's better for output transformer.
But for 50-60 Hz pulsation - we may use this two tipes. |
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| c.d.s. |
sorry, posting from my iphone, so no ICQ :(
W core it is.
will send you a PM with my address so you can calculate shipping.
regards
carl |
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| nafanja |
Hi Karl.
I am look the dimentions of E(w) transformers amf toroidal.
The first a bigger than toroid.
I think You need think about.
In the first picture is OCM transfpormers and for Your power You will need OCM 0.6 = 600W or OCM 1 = 1 kVA. It's may need more cooper with small dimention toroid. In toroid I use 250% capacitance that more than big OCM. Weigh, dimentions, and power capacitance and price may be no interesting for you.
OCM I prefer for SE amps.
Transformer steel have not a big price and it's good for power cap.
Perfectly for me, I use 250-300% capacitance that work in linear indictance zone. Many factory use a maximum load. It's cleary - the taxes, worker fees, high-speed making, licemcing and other...
I think that that people use shot lnear corve zone(or transistor), why not look for inductance linear zone? Transformer is a enerator of curve, and this detail have distortion two (THD).
If You need a good (nice) looking - the OCM may be You will need to close by metal cap(box). ..Toroid the same...
The box - it's not a problem. Painting too.
I have all this.
Make the transformer for city light lamp or the amp - is a diferent think. Economy the money or dimentions.
Think about. |
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| c.d.s. |
hmm,
what if we go with smaller voltage 300 VA? will that help with dimensions?
can you do R or C core?
can you give me dimensions for the OCM 0.6?
best regards
Carl |
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| nafanja |
It's near 13 sm height,13sm - 10sm...
I don't see the problem to make it.
now i make the powewr transformers from toroid core.
I see many forum informations and diference opinion about.
But I have my own thinking now.
Toroids must have the caoasitanse and low Tesla ( Gaus).
If make two transformers with the same dimewntion toroid core
and ware
- it's will be the 500% capasitanse.
Many people afraid to use the toroid, it afraite the DC in inpit.
Many factories make the max level of minimal load.
It's the victory under the price, power
capability and dimention.
It's the same thing like with Philips
TDA1541
It'sa cheap element, but this element make give 20 bit, easy to make, have a low prise and with SONY filter (noise -110)
to overpaly the future high price brands.
-1db spectrum linearity and high oversampling rate.
PCM63 cost near
100 USD, the TDA some dollars...
Many people don't like TDA - thay don't knoe how to sweetch this scheme.
It's the same.
Toroid easy to make, I am make the core witha partners, and have a cheap cooper, easy to wirering and make a big cap.
For this dimention I am get more than from E transformers.
But look... |
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| c.d.s. |
The 13cm X 13cm X 10cm is a good size for me.
I understand your thoughts about torroids, but they are not hard to get in the U.S.
To get E core or R core is very difficult. I've never even heard of W core until this
thread came up :xeye:
If the above size is for W- core let's see what the cost is :)
regards
carl |
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| nafanja |
It's will be near 60 USD.
but tell me about current in A in output for understanding the d of Ware. |
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| nafanja |
I have the idea to make a special transformer for
MC input transformer.
Interesting to know the price, which people readu to do for ultra-high-class.
I have toroid Co and Fe core.
m=120000 (like perm.)
Bmax (Co )= 0.45 T (4500 Gs)
Fe = 0.9 T (9000 Gs)
Diameter(tr.core) = near 35mm
Heght = near 1.5mm
With 120 w with double wiring 0db at real 100-120 Khz (Generator impedance near 75 Ohm wioth eqivalent Resistor in secondary and Ktr = 1:1).
May be Use mid pint for ground at secondary, and third isolated ware for ground to, for killing the negative capasitans.
Diameter of ware = 0.15 -0.2 mm
Have any idea? |
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| c.d.s. |
| quote: | Originally posted by nafanja
It's will be near 60 USD.
but tell me about current in A in output for understanding the d of Ware. |
| quote: | Originally posted by nafanja
It's will be
500 VA
1)120V
2) 27V (27-0-27)
3) 27V
4) 27V (27-0-27)
5) 27V
500VA/2 = 250VA/(27V*2) = 2,22 A
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I intend to fuse with a 2.15A slo blo fuse. Any more information you need?
Thank you for taking the time to sort this out :)
Carl |
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| nafanja |
I am offer to look about payment.
The methods You can look at this page:
http://tube-fun.narod.ru/business1.html
I offer to make 50%.
I am start to make the transformer
after the transfering the payment.
When I winish finish, maximum time is the week for making -
I will give You know about, I will be know the weigh - and I will read to know the price for sending, I will give You know the second part and i will send it to You.
If You will possible to pay at one moment...
What do You think? |
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| c.d.s. |
Nafanja,
You have mail ;)
best regards
carl |
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| nafanja |
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. |
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| nafanja |
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 |
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| nafanja |
1 KVa toroid transformer.
Price - 90 USD.
up 110 Volt and 9.09 A and more...
Price - 70 USD
670VA up 60-70 V and more...
Price - 60 USD
150 VA |
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| nafanja |
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 |
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| Leszek_K |
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 |
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| Leszek_K |
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 |
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| nafanja |
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? |
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| Leszek_K |
Hi Nafanja
I have got good Mission speakers so I do not really need new.
Anyway, back home and thinking/options evaluation process is about to start.
Cheers |
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| nafanja |
OK
I will bew wait |
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| raginbullwinkle |
| looking for a price on a 220va 36vct transformer for a chipamp kit. EI or toroid, 115v input. Shipment would be to zipcode US zip code 33065. Thanks. |
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| Lovan |
Hi
I'm looking for 2 toroids 300-500 VA with 2x18v secondary. 240v input.
Shielded and potted if possible.
Price and shipping to Sweden? |
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| nafanja |
| I can offer the change for TDA1541A or full range vintage speakers. If You have the thinking - tell me.. |
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| nafanja |
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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| nafanja |
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. |
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| nafanja |
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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| ROCKMANDRAKE |
Hi Nafanja,
i am looking for 2 output transformers for high end audio applications.
Here are their specifications :
Primary : 5 ohms
Secondaries : 4 & 8 ohms
Max dc on the primary : 400 milli a
5 volts MAx on the primary
Could u quote price ( shipping included ) to ship to France...
Regards
Rock
:cool: |
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| nafanja |
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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| dshambala |
Hello,
Roughly what are the shipping costs per kg to USA East Coast?
Thank You,
M |
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| nafanja |
| The delivery to Europe and USD the same price (Per Avia) by Post of Ukraine is 10 USD per 1 kg. |
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| nafanja |
Amprph variant weight near 5 kg pare.
To the Europe and USA it's cist 50 USD |
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| ROCKMANDRAKE |
Hi Nafanja,
thank you for your fast reply...
my amplifier is only 2 watts power output ! ! ! Are you sure about transformer weight ( 20 - 40 kg )...
I am interested in amorph... technology.
Regards
Rock |
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| nafanja |
I am make for myself this kind transformers.
I am make 6 watt output transformers and this enough for me.
But hard SE transformers I am use for deep bass frequency and loe phaze distortions.
Now I am make pair and I will show You here.
But Your loos mast be very low.
The transformer for 3 kOhm primary may have 70 Ohm cuper primary resistens with 1500 w coil and diameter = 0.5-0.6 mm .
With 10sm2 (transformer)core, the primary coil will have 10-15 Ohm.
Your 5 Ohm primary must have 0.5 Ohm cuper coil resistence minimaly.
May be tell me Your bass freqency ranjge and we make the calculation. Ny I am look for this variant. |
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| nafanja |
| I am send the mail to You. |
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| Veronica |
WTB
Hello looking for a Toroidal Transformer this is a replacement for FBT OEM Renkus-Heinz Amplifier P2400.
Original Mfgr part number TL490-CE in case anyone happened to have one laying around.
Here are the specs on this transformer. Although the original has Dual input 110/220v. I would be happy with only 110v input, we are not planning to tour Europe any time soon.
For outs need
11v 0v,
55v 0v 55v,
0v 11v,
20v 0v 20v,
19v 0v
700w total
If you can build one of these, I would love to find out what it would cost for a high quality transformer.
Please include shipping costs to the US. :D
A long shot item is that I am always on the lookout for Renkus-Heinz P3500's in any condition. P2950s maybe if they are not too bad of shape.
I do have a chassis and Toroidal for a P2700, so if anyone comes across a board in repairable condition and you want to make a few bucks, think of me. (That is a one time item that I want). Of course I would also be happy to give the Toroidal a good home so if you have a P2700 and lack a Toroid, lets work a deal, I dislike having half of anything, would rather give my half a good home or purchase someone else's to complete this item.
These are the only amps that I wish to deal with. Someday when I win the lottery, I might play with some Lab Gruppens, but for now, these are what I will buy. My focus are the P3500s. I like those best of all. Maybe 2950s if they are in good shape. |
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