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Specialist Range Toroidal Output Transformers

This range includes output transformers for the following circuit topologies: separate screen grid winding techniques (SSCR); cathode feedback windings (CFB); and unity coupling.

New Techniques of applying local feedback are used to increase the damping factor, instead of using overall negative feedback. These techniques meet the increased demands of new digital audio developments for extending high frequency response in the digital versatile disc (DVD).

Short form specifications are shown below. For full, individual spec sheets in html, click on the part number; for pdf versions click in dowload section.n
SPECIFICATIONS


4070-SSCR 2100-SSCR 4070-CFB 2100-CFB 2100-CFB/H 1070-UC
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Tube Type EL34
Primary Impedance 4000 2000 4000 2000 2000 4000
Power 70 100 70 100 100 70
Secondary Inductance 4 4 5 5 5 5
Turns Ratio (Np:Ns) 31.6:1 22.4:1 28.3:1 20.0:1 20.0:1 28.3:1
Ultra Linear Tap 40 40 33 33 33 -100
Cathode Feedback Tap 7.1 10 10 100
Power Bandwidth (-3dB) 14-185k 14-177k 14-222k 14-224k 23-290k 14-451k
Insertion Loss 0.10 0.26 0.25 0.28 0.20 0.24
Quality Factor 366,000 321,000 338,000 474,000 337,000 2,440,000
Case Aluminum, textured black finish, 152.4 x 88.9

Download

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4070-SSCR | 2100-SSCR | 4070-CFB | 2100-CFB | 2100-CFB/H | 1070-UC

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