Transformer Price List

The Different types of transformers we have available are:-

• Mains Transformers
• Input Transformers
• Interstage & Preamp Output Transformers
• Single Ended Transformers
• Push Pull Transformers
• Chokes

Output Transformers

We are in the process of building up four separate ranges of Audio Note output transformers in order to offer the best possible outputs at different price points - they fall into four categories:-

1. Economic range, where the price/quality range is carefully calculated to ensure audio quality in a compact package. The quality criteria for this range are 20Hz-20KHz -1 to -1.5dB IE-core with silicon steel laminations supplied with frames. The main cost saving being the use of smaller cores, specified to the exact power level required rather than over specifying by 50% or 100% as we do on the Group B.
2. Mid-priced range, These are typically 20Hz - 40KHz -1.5dB IE-core with silicon steel laminations wound with Oxygen free copper supplied with frames (or shrouds if requested) with flying leads.
3. High quality range, this is a range of double C-core outputs for Single ended circuits exclusively, not Push Pull outputs will be offered unless demand requires. Typically 16Hz - 50KHz -1.5dB Stripwound double C-core made from the best available silicon steel - these outputs compare more than favourably with the best types from years gone by, and from other current sources like Partridge, Tango and Tamura.
4. Audio Note silver wired range - specially selected.
   

Specifications

• PP=Push Pull
• PPP=Parallel Push Pull
• SE=Single Ended
• PSE=Parallel Single Ended
• UL=43% Ultra Linear Taps, as a general rule we do not condone the use of UL-taps.

All primary impedances are calculated for Class A operation, with the main consideration given to maximum dynamic power transfer ability and minimum distortion.
All our single ended output transformers are air gapped and the maximum standing current before saturation is indicated.
All our output transformers are tested on insulation levels of minimum 3KV except our 845/211 output transformers which are flash tested at 5KV.

We generally overspecify our transformers by 50% power for push pull operation and 100% for single ended.
We do not give any further technical information on our output transformers as we do not wish to take part in technical competitions. Our products are designed to criteria which are, and will be understood once they are listened to!

In addition to the output transformers listed, we offer a design service where we can supply almost any requirement for wideband transformers, whether for microphones, moving coil cartridges, line input, phase splitter, interstage, driver or power output.
We design prototypes in-house. The cost for the paper design is £200.00, the prototype cost is calculated on a per case basis. We can also produce in production quantities.

Sizes are given as width x height x depth.

Mains Transformers

This range relates to our finished products, mains transformers are notoriously difficult items to offer as the number of permutations of HT and filament voltages are almost endless. We have added transformers for making replicas of the Kassai and Ongaku, as there have been considerable call for these. Likewise we are preparing mains transformers for the WE91 described in Sound Practices Issue 1, we shall continue to expand the range as opportunities and our experience of your requirements improve.

Mains Transformers

Driver, Interstage & Preamp Output Transformers

Single Ended Output Transformers

Push-Pull Output Transformers

Chokes