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Modulation Transformers

Primary: 5000 ohm - DC
Secondary: 100 ohm - DC, 90V
Current: 100mA, 81 Watts

Kenyon 811A matching transformer. Source impedance: two 811A tubes in push-pull. Hermetically sealed. 1,070 peak wv. NSN: 5950-553-3484.

14.75k Ohm Primary - 6.6k (w / 5.75k tap)
350mA DC secondary - 8kV test
Dimensions: 5-1/4" x 6-1/4" x 7-1/2"H (incl. insulators)

Removed from Wilcox transmitters, these 350 watt modulation transformers are ready for a second life. They operated plate to plate on a pair of class B, 813 valves to modulate a single 250TL RF amp. This is an auto-transformer with multiple series windings. Call for details. 5-1/4" x 6-1/4" x 7-1/2" high, including insulators. We will include a copy of the Wilcox circuit in which the transformer was used.