Designers and manufacturers of hand wound transformers for audio.




Black Art




Black Art Single Ended Output Transformers

Conventional series

This series employs EI Laminations, polymer and paper insulation materials to produce an output transformer with a warm to neutral character. For those constructors looking for a more romantic & classic valve presentation. Black bell ended housing with flying leads

Model Anode Load
[Ohm]
Bias Current
[mA]
Primary
resistance
Frequency Response
full power in circut
Matching valve
(suggested)
Dimensions
LxWxH [mm]
Weight
[kg]

 Finish
Price
AUD$
2k5:8/4-60EIB 2500 60 47 10 Hz - 35 kHz 2A3 125x125x125 5  Bell ends 250
2k7:8/5-80EIB 2750 80 47 10 Hz - 35 kHz 300B 125x125x125 5  Bell ends 250
11k:8/4-60EIB 11000 60 100 25 Hz - 20 kHz 211/VT-4C 125x125x125 5  Bell ends 385

Reference series

Much more transparent and neutral than the "conventional" series. Double C core construction gives greater low level detail and attack. These units can be very neutral and sometimes ruthless in there articulation of the information and should only be partnered with the best possible components and circuits. The Teflon (P.T.F.E.) dielectric inter layer insulation provides the minimum possible dielectric absorption adding that extra transparency to the highest frequencies. The "cased" units are housed in fitted black case aluminium and stainless steel case work with flying leadouts.

Model Anode Load
[Ohm]
Bias Current
[mA]
Primary
resistance
Frequency Response
full power in circut
Matching valve
(suggested)
Dimensions
LxWxH [mm]
Weight
[kg]

 Finish
Price
AUD$
6k:8-20CT 6000 20 55 18 Hz - 35 kHz 417A,3A/167 76x55x65 1

 open
135
6k:8-20CT 6000 20 55 18 Hz - 35 kHz 417A,3A/167 76x55x65

 1.1

 cased

 220
2k7:8/4-60CT.3 2750 60 47 10 Hz - 55 kHz 2A3/300B 125x125x125 5

 cased
385
2k7:8/4-80CT.3 2750 80 47 10 Hz - 55 kHz 2A3/300B 125x125x125 5

 cased
385
11k:8/4-60EI.14s 11000 60 100 25 Hz - 20 kHz 211/VT-4C 125x125x185 10

 cased
635
10k:8/4-100EI.0 10000 100 150 25 Hz - 20 kHz 845 135x135x200 12

 cased
800

Prices in Australian Dollars see Trade terms page for a guide to exchange rates and ordering information.

TECHNICAL

OPTIONS

Air gapped optimised for alternative bias currents . Copper sheilding case.

NOTES :

Frequency response is measured in circuit using the actual valve indicated in the "suggested valve" column. The response quoted is measured at the limit of class A operation and indicates the -1.0 dB points.

Single Ended transformers are designed to operate at a specific bias current. Using a different current WILL compromise bass performance and increase distortion which will result in a lumpy indistinct bass and a veiling of the midrange vocal articulation. If you intend to operate Black Art transformers above or below their rated bias please contact Black Art and we will adjust the air gap to suit your application.

 

Under Development


The following table contains a list of the output transformers currently under development at Black Art. They are listed for reference and are not yet at a sufficient stage of development to be unleashed into the big wide world. Should you require further information please contact Black Art.
Model Anode Load
[Ohm]
Bias Current
[mA]
Primary
resistance
Frequency Response
full power in circut
Matching valve
(suggested)
Dimensions
LxWxH [mm]
Weight
[kg]
Price
AUD$
? 12-14k 30 ~200 25 Hz - 20 kHz 10/10Y 100x105x105 4 ?
                 
? 4.6k 36 ~100 20 Hz - 20 kHz 45 50x65x76 1 ?
                 
? 4.5k 55 ~100 20 Hz - 20 kHz 300b, 50 125x125x125 5 ?
                 
? 6.8k 100 ~100 20 Hz - 20 kHz 845 150x150x150 6 ?
                 


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BLACK ART AUDIO
Victoria, Australia
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