Trafomatic replied to say they are not making R-Cores; prices for toroids are very competitive.
Specifications for 600VA toroid, 2x28v secondaries
Both have electrostatic and electromagnetic shields, and are resin potted
Trafomatic: 6kg, 4% voltage regulation
Toroidy Supreme: 5.3kg, 3% voltage regulation, 243mΩ resistance
R-Cores
James Transformers: 5% voltage regulation
I'd like to use R-Cores in a power amp because several people have reported improvements in power amps when they switched from toroids to R-core, whilst no-one has reported the opposite.
Even if the lower emissions is less important in power amps, the lack of noise coupling to the mains is a benefit.
Specifications for 600VA toroid, 2x28v secondaries
Both have electrostatic and electromagnetic shields, and are resin potted
Trafomatic: 6kg, 4% voltage regulation
Toroidy Supreme: 5.3kg, 3% voltage regulation, 243mΩ resistance
R-Cores
James Transformers: 5% voltage regulation
I'd like to use R-Cores in a power amp because several people have reported improvements in power amps when they switched from toroids to R-core, whilst no-one has reported the opposite.
Even if the lower emissions is less important in power amps, the lack of noise coupling to the mains is a benefit.