Can someone help me find the correct power transformer for a stereo tube pre-amp kit? The specs say: AC 180V-0-180V 2*AC 6V 30W
Attaching a photo of schematic as well.
Any information or advice will be appreciated. I don't know anything about power transformers, so i'd appreciate any advice everyone can give me!

Hi,
I am about to build one myself, as a total n00b of course. Just waiting for the package with the ready built pcb board. I thought to myself that I could use normal stick-it-in-the-wall type of adapters, at least for the 6v transformers. The tranformers you looked at were really expensive.

Best Regards,
Joni

 

When you post into an ongoing thread, it get s confusing to know what reply is to whom. Please don't hijack - start your own thread.

This is the previous thread - http://forum.allaboutcircuits.com/showthread.php?t=18665.

You might want to do some reading on vacuum tube theory. Plate voltage is more in the 150 - 250 volt range. Not only are the plate transformers pricey, so are the tubes and their sockets.

 

Hello,

Here is some general information on tubes fom the EDUCYPEDIA:
http://www.educypedia.be/electronics/tubes.htm

There are more tube related pages over there:

Tubes: Datasheets, General, Nixie Clocks, Old radio, Special Tubes, Tube audio amplifiers, Tube guitar amplifiers, Vacuum Fluorescent Display


Greetings,
Bertus

 

When you post into an ongoing thread, it get s confusing to know what reply is to whom. Please don't hijack - start your own thread.

This is the previous thread - http://forum.allaboutcircuits.com/showthread.php?t=18665.

You might want to do some reading on vacuum tube theory. Plate voltage is more in the 150 - 250 volt range. Not only are the plate transformers pricey, so are the tubes and their sockets.

Yes, but the thing is we are both after the same stuff. He wants tranformers for the "$20 Chinese AC 180V-0-180V 2*AC 6V 30W preamp DIY kit", I want transformers for the "$20 Chinese AC 180V-0-180V 2*AC 6V 30W preamp DIY kit". I will continue hijacking until I get some answers.

I don't really need to know much more about tubes than I already know (nothing). All I need are these silly transformers. Transformers that noone can offer me, for any sum of money. The best advice I have got from a store is to build one myself. Thanks a lot!

This is what I have to go on: "AC 180V-0-180V 2*AC 6V 30W". I live in Sweden/Norway so I get 230V from the wall (not 115V, as some freaks do).

Primary: 180V-0-180V (or 190V-0-190V)
Secondary 1: AC 6.3V 30W
Secondary 2: AC 6.3V 30W

I actually found one trafo locally produced in Sweden, the Lundahl transformer, but they only had 250V-0-250V, which is too high. The Lundahl LL1683 had two secondary 6.3V in the same unit AND a great reputation. Too bad...

Any suggestions, other than wiki-guides?

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Edit:
I have a suggestion for myself:
"PT02 - 190-0-190V power transformer
Dual 120V/240V primaries, 2A heater supply; ideal for preamps and amps up to 7W output."
http://www.ampmaker.com/pt02x.asp

BUT. It only has 7W output. I seem to be needing 30W. Next...