Audio grade construction
My audio grade designs use selected, edge-bonded toroidal cores at reduced flux density for low mechanical noise.
Note that due to the extra copper used compared to a standard design it may be necessary to derate the power rating by 10%, e.g. 450VA is achievable on a standard 500VA core
They are wound for low stray field.
Flexible (stranded) leadouts are fitted as standard
Please specify if you require any of the following options :
Electrostatic screen between the primary & secondary windings
An external GOSS band to further reduce stray field
Potted centre with either a central hole or with a threaded insert
These toroidal transformers are for use in high power amplifier designs where some mechanical noise is acceptable.
Winding resistances are kept to minimum
Like the audio grade types they are also wound for low stray field & flexible (stranded) leads are fitted as standard
Valve (Tube) PSU transformers
I specialise in the production of toroidal mains transformers for valve (tube) amplifier power supplies.
Designs are of audio grade construction with flexible (stranded) leads as standard.
See audio grade column for options
Autotransformers are ideal for adjusting the mains voltage to a higher or lower value.
They exhibit low regulation & can provide considerable space savings.
Autotransformers do not provide mains isolation & cannot convert the frequency, e.g. from 50Hz to 60Hz
Toroidal 100V Line transformers
For a 100V output transformer I will need to know the nominal load for the amplifier (or output voltage), the power rating & the frequency range, (the lowest frequency will determine the physical size of the transformer)
For a 100V input transformer I will need to know the load, power rating/s & frequency range.