• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Where to buy HT toroids ?

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Shoog

Shoog

Member
Joined 2002
A toroidal is a poor choice for HT because it will let all the line crud into your preamp. EI transformers choke off that same crud so are a better option. Unless you have a very specific reason for using a toroid then I advise dropping the idea.

Piltron make good HT torodials.

Shoog
 
Stixx

Stixx

Member
Joined 2003
original-ton.net
Stixx, thanks for the links;)
Click to expand...

You're welcome!

For EI transformers the choice is much bigger...

again www.askjanfirst.de
or www.reinhöfer.de (both very good reputation)
or http://www.ae-europe.nl/

but there must be tons of others...Lundahl, Sowther, Hammond etc.
On Eeehbay you will find a lot of used transformers out of old radios that should be suitable for a pre.
 
H

hotbottle

Member
Joined 2008
By 2 of any cheap low voltage transformer - say, something with 12V secondaries.

Then connect them back to back (i.e. 12volt winding to 12 volt winding). The whole setup then makes a 230 to 230 V transformer.

or

buy one, but run it backwards, feeding the 12Vac 'primary' from a cheap ac plug pack power supply. You can rectify/regulate/drop the 12vac directly for heater supplies as well.
 
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