amplifier - Insane power dissipation on EL34 tubes in push-pull power stage - Electrical Engineering Stack Exchange
Japan Kawasaki film 50w 5.5K: 4O 8O push-pull output transformer, suitable for KT88, EL34, 6P3, with super linear connector - Newegg.com
a pair 50W 2.5K wide frequency response super linear push pull output transformer 300B 2A3 EL34 to be used in parallel push pull|Transformers| - AliExpress