Triad low-level audio transformers have been adopted as standard by many manufacturers of the finest in audio equipment. No other transformers offer such wide frequency range and such effective magnetic shielding in such small size. Shielding up to 95 db. is attained by multiple "Trialloy" cases interleaved with heavy copper shading rings. These transformers are solidly constructed, rigidly mounted with welded stainless steel studs, and hermetically sealed to MIL-T-27 specifications. Beautiful appearance, unmatched performance, long life, minimum size, are outstanding features of these quality transformers.

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Hermetically Sealed Low Level Audio Output, Mixing, Matching, and Bridging Transformer

Hermetically Sealed Low Level Audio Input Transformer
Hermetically Sealed Low Level Audio Output, Mixing, Matching, and Bridging Transformer

Hermetically Sealed Low Level Audio Input Transformer
Hermetically Sealed Low Level Audio Output, Mixing, Matching, and Bridging Transformer

Hermetically Sealed Low Level Audio Input Transformer
Hermetically Sealed Low Level Audio Output, Mixing, Matching, and Bridging Transformer

Hermetically Sealed Low Level Audio Input Transformer
Hermetically Sealed Low Level Audio Output, Mixing, Matching, and Bridging Transformer

Hermetically Sealed Low Level Audio Interstage Transformer
Description N/A Triad low-level audio transformers have been adopted as standard by many manufacturers of the finest in audio equipment. No other transformers offer such wide frequency range and such effective magnetic shielding in such small size. Shielding up to 95 db. is attained by multiple "Trialloy" cases interleaved with heavy copper shading rings. These transformers are solidly constructed, rigidly mounted with welded stainless steel studs, and hermetically sealed to MIL-T-27 specifications. Beautiful appearance, unmatched performance, long life, minimum size, are outstanding features of these quality transformers.
Click here to check stock >> N/A N/A N/A N/A N/A
Applications N/A Universal Line or Mike to Grid. N/A Universal Line or Mike P. P. Class A Grid. N/A Dynamic Mike to Grid Hi-Gain N/A Line to P. P. Class A Grids-Hi Level. N/A Single Plate to Single Grid.
Power Level N/A
Primary Impedance N/A 62.5 Ohm150 Ohm250 Ohm600 Ohm N/A 62.5 Ohm150 Ohm250 Ohm600 Ohm N/A 30 Ohm50 Ohm N/A 62.5 Ohm150 Ohm250 Ohm600 Ohm N/A 15000 Ohm
Note for Primary Impedance N/A Balanced Center Tap. (600 and 250 Ohm) N/A Balanced Center Tap. (600 and 250 Ohm) N/A N/A Balanced Center Tap. (600 and 250 Ohm) N/A
Secondary Impedance N/A 77000 Ohm N/A 117600 Ohm N/A 130000 Ohm N/A 117600 Ohm N/A 110000 Ohm
Overall Turn Ratio N/A 1:11.3 N/A 1:14 N/A 1:65.7 N/A 1:14 N/A 1:2.7
Note for Secondary Impedance N/A N/A Center Tap N/A N/A Center Tap N/A
Frequency Response Range N/A 20 to 20000 Hz N/A 20 to 20000 Hz N/A 50 to 10000 Hz N/A 20 to 20000 Hz N/A 20 to 20000 Hz
Maximum Input Level N/A 10 dBu N/A 10 dBu N/A 0 dBu N/A 20 dBu N/A 15 dBu
Shielding N/A P-5 - Three nickel alloy shields interleaved with two heavy copper shading rings - 95 db. reduction in pickup. N/A P-3 - Two nickel alloy shields interleaved with one heavy copper shading ring 70 db. reduction in pickup. N/A P-5 - Three nickel alloy shields interleaved with two heavy copper shading rings - 95 db. reduction in pickup. N/A P-1 - One nickel alloy high permeability shield - 45 db. reduction in pickup. N/A P-3 - Two nickel alloy shields interleaved with one heavy copper shading ring 70 db. reduction in pickup.
Case N/A GP-4
DCR 1-2 N/A
DCR 3-4 N/A
DCR 5-6 N/A
DCR 6-7 N/A
DCR 8-9 N/A
DCR 9-10 N/A
Additional Information N/A Avoid redesign - Use Triad HS and HSM transformers in military prototypes

Triad HS and HSM series transformers are designed to meet MIL-T-27 requirements. Most of these transformers use standard MIL-T-27 case sizes. Exceptions are GP cases or any cases showing a Bw dimension, which may be classified as MIL-T-27 'YY' cases. Equipment using these transformers need not be redesigned to submit for military approval. The basically good design factors which are necessary to meet MIL-T-27 standards for performance ensure longest life in any class of service.

These transformers are permanently marked with electrical and test data as specified in MIL-T-27. All are "Climatite" treated, use sturdy TRIAD terminals and are beautifully finished in gray enamel.
Note N/A Low frequency loss will result from unbalanced DC in windings other than where specified.