KUSTOM DEFENDER 15H SCHEMATIC
V15 & 15H - Kustom Amplification
Due to the simplicity of the Defender 15H’s all-tube circuitry, a wide range of tones can be obtained with the use of this control alone. For example, when set in its lower ranges, the sound is clean and snappy. As the Volume control is turned up, light overdrive is generated by the amp’s all-tube circuitry.
Kustom Defender V15 | The Gear Page
May 15, 2014but so does the class A Defender 5h which is a single ended EL84 amp which have around 340V plate and 310V screen but has a 270 ohm bias resistor which equals a 135 ohm resistor for two tubes. Since the Defender 15h drops its screen a little more than the defender 5h it could take a little warmer bias,, so maybe a 120 ohm would fit the bill.