230V transformer for a 832 PP project

[trondareo]

I am collecting parts for building a 832 PP amp based on this audio diy

But I have trouble finding a 230V primary to 200VAC secondary power transformer. Heaters are 6,3V but I can find a second transformer for this if necessary.

Lundahl and Plitron supply 220V units but they are on the expensive side and require some reduction resistor or other solution. I have found a Edcor 8000K output transformer, and wonder if I should call them to hear if they have something not listed or custom for a reasonable price.

I have been through just about everything, but hope some of you guys can help. 😕

 

[Arnulf]

Do you have access to transformers with higher ratio (say 230V : 275V) ? You could use one and simply turn it around.

 

[trondareo]

I found this Edcor trannie that seems to fit the bill: XPWR088
It´s primary 240 V but our typical current is 233 to 235 V so it might be OK

I´m really a newbe at this so any input is welcome.

 

[kuroguy]

If you want a torroidal transformer, look at the 220 volt secondary ones at Hammond Mfg. - Toroid Power Transformer - (182 Series) .

By the way, I have one of those amps (see my avatar and search for some photos in the post pictures thread) and really like it.

 

[trondareo]

Ah yes, I´ve seen your project kuroguy; inspiring!

There is not much current over the B+ so it might be OK to reduce 220v with just a resistor of two watt. That would open up my options a bit.

But right now I am thinking of using the XPWR088. Because I like the classic style. It has secondaries of 340V at 400mA, 200V at 200mA, 12.6V (6.3-0-6.3) at 5A and 10V at 5A. I´m thinking of using the 200v for two B+ es. With all four tubes I hope to draw about 0.100mA. And then the 2 x 6,3 for heaters have plenty of power. The others will not be used.

 

[torrence]

I bought a 460 VCT toroidal transformer from Antek for my own 832 project. It has dual primary windings, so should work fine with 220VAC. It also has dual heater coils, so you can choose 6.3 or 12.6. They sell these cheaper on eBay than through their own store.