[Elecraft] K2 #7379 troubleshooting

[Brian Stevens]

Hi,
I've hit a snag during 40m tx alignment in being unable to peak L1/L2 to give more than about 500mW o/p with the power setting at 2W. I've gone through the troubleshooting procedure & all checks out ok until I get to the LPF,BPF & T-R switch section of the shared circuit testing.

Using the 10Mhz crystal oscillator in the manual with 0.14V at the antenna i/p I get these readings:

LPF o/p @ W1 = 0.004V (expected 0.13V)
T-R sw #1 o/p @ W6 = 0.003V (expected 0.093V)
BPF o/p @ left side of D6 = 0.003V (expected 0.086V)
T-R sw #2 o/p @ right side D6 = 0.002V (0.077V)

I don't know if it's relevant but the current display in rx mode is higher than the suggested values:
11.8V 0.36A (LCD nite, graph bar)
11.8V 0.30A (LCD day, graph dot)

Any advice would be appreciated.
73 Brian
G0WZX