What is your target output voltage? A 950V toroid is going to give you at least 1300V in a CLC, there would be a problem with choke input admittedly..
I use ~700V custom wound transformers from Edcor in my GM70 amps and get a little over 1kV @ 125mA out from a CLCLC filter with a SIC bridge.
The GM70 is rated for a maximum of 1500V, and I have to admit that I am very careful around the 1kV in my amps. (Testing done with covers in place, and diagnostics done with the HV secondary disconnected.) Corona when it is present is quite audible, problem is now minimal, but some new tubes make some very odd noises on first power up and until the bases bake out. Running over 2.5yrs now with no failures.
I use ~700V custom wound transformers from Edcor in my GM70 amps and get a little over 1kV @ 125mA out from a CLCLC filter with a SIC bridge.
The GM70 is rated for a maximum of 1500V, and I have to admit that I am very careful around the 1kV in my amps. (Testing done with covers in place, and diagnostics done with the HV secondary disconnected.) Corona when it is present is quite audible, problem is now minimal, but some new tubes make some very odd noises on first power up and until the bases bake out. Running over 2.5yrs now with no failures.
What do you guys think about using this:
AS-4212 - 400VA 12V Transformer - AnTek Products Corp
Wired in reversed ?
AS-4212 - 400VA 12V Transformer - AnTek Products Corp
Wired in reversed ?
Are you talking about connecting the 12V winding directly to the mains? If you are the number of turns are far too low and massive amounts of current will flow in that secondary winding, also core will saturate and I suspect you will have a great deal of smoke for your trouble.
Not a good idea, have you ever designed or built an amplifier running at anything like these voltages? Mine was my first and I waited 30yrs before building one running at these elevated voltages.
Not a good idea, have you ever designed or built an amplifier running at anything like these voltages? Mine was my first and I waited 30yrs before building one running at these elevated voltages.
In your country there is an incredibly helpful bunch of people at the Toroid Corporation of Maryland: Custom Design Toroidal Transformers
I have purchased from them "mail-order". Apart from a range of off-the-shelf items, they can assist with any design you want, and even offer a "kit" service.
Tell them the guy in Ireland recommended them as he promised he would.
I have purchased from them "mail-order". Apart from a range of off-the-shelf items, they can assist with any design you want, and even offer a "kit" service.
Tell them the guy in Ireland recommended them as he promised he would.
Anybody wishing to contribute to this thread may wish to look at this locked thread first before deciding if they are going offer any advice.
http://www.diyaudio.com/forums/tubes-valves/251415-capacitor-drain-tube-bench-power-supply.html
In my line or work, a big difference between ability and ambition (ego) kills people. In this hobby, there is the same danger.
http://www.diyaudio.com/forums/tubes-valves/251415-capacitor-drain-tube-bench-power-supply.html
In my line or work, a big difference between ability and ambition (ego) kills people. In this hobby, there is the same danger.
Closed by moderation over safety concerns.- Status
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