Shielded MC Step-up Transformers
I have a somewhat different approach to winding MC step-up transformers. My goal is a wide bandwidth well behaved device that is wound to match a specific cartridge to a specific gain structure. I use a substantial 80% nickel core that will not fit into the typical mumetal shielding cans so I came up with my own shielded enclosure fabricated from copper plated steel, mumetal and wormy maple. One variation on the finished look can be seen by clicking on the picture above. The basic design procedure takes into account the internal impedance and the output voltage of your cartridge and sizes the turns ratio to match needs of your overall gain structure. More info on the selection process can be seen HERE. If your needs change in the future, the enclosure can be fitted with new transformers for a small cost.
Amorphous and Nickel SE output transformers
Designed to fit your system. We offer a single impedance to load version on an amorphous or nickel core. Rather than randomly apply impedance values, we work with you to optimize the design to fit your specific application. A 5K:8R sample to load a 2A3 delivered full power down to 10hz at -1dB and hit -1db at 55khz and -3dB at -85khz.
Priced From $550 each.
Class A Push Pull Output Transformers.
Almost all Push Pull outputs available today were designed (or based on designs) with class AB pentodes and feedback in mind. If a Class A triode output amp is in your future lets talk.
Priced From $550 each.
1:1 Output transformer.
This is built on the same core types as our SE output but has a 1:1 turns ratio. The intended use of this transformer is to provide a load to the tube and isolate DC from its output so a smaller optimized impedance match transformer can be used to match the tube to the speaker. This output can also be wired for a parafeed plate choke, then with a simple change of connection the secondary can feed the output eliminating the parafeed cap. Of course this could also be used as a 1:1 interstage transformer.
Priced from $500 each.
1:1 Nickel Interstage transformer for DHT's
This is a 1:1 Interstage transformer desinged to specifically load DHT's. We add an additional winding to the IT which carries the filament current in opposition to the B+ current partially ofsetting the flux in the core. The net result is a nickel IT that doesn't saturate even under the most extreme conditions.
Priced from $200 each
Phono Step-Up Transformers (SUT's)
Custom designed transformers on a large 80% nickel core wound specifically for your cartridge / phono pre interface. Please understand that these devices are unshielded and will require assembly into a shielded enclosure. We can provide you with some people who can do this task or help you DIY your own.
Priced From $250 each.