Elecraft DL1 Diode Vf versus Voltage

Voltage measurements at 1 dB steps from 0 to 11 dB

Elecraft DL1 Diode Vf at 5.5 Watts

Matched 1N5711 devices

KX3 Power=10W
DL1 1N5711 V out=11.42V
Added 1N5711 V out=23.08V
(11.42 + Vf) * 2=23.08 + Vf
Vf=0.24

Measuring AT1 Attenuation Steps using XG3 RF Signal Source

AT1 StepMeasured Attenuation
10.972 dB
33.004 dB
66.195 dB

Attenuator Components
2.6 dB9.5 dB