Re: [Elecraft] Low power with K2/100

Hi all, It turns out that pin 17 on U2 has an undefined voltage. When NOT selected that band (40/30M) it must be 12V. I measure 7V. The input for this switch is pin 2 at U2 Here I measure 0V (=good) and goes HI (5V) when selected So U1 is working well Will heading tomorrow for a new U2

[Elecraft] Low power with K2/100

Hi After a few years of good service,I have a problem with the K2 output. I have the K2 with K2/100. The barefoot K2 put full power out on all bands via the bnc connector When I connect the K2/100 with PA off with the menu there will be low power on the ant connector on the higher bands

Re: [Elecraft] Low power with K2/100

Peter, The fastest way to determine if you have a problem with the Low Pass Filter in the KPA100 is to check it with an antenna analyzer. Disconnect the small coax to the K2 RF board and terminate it with a 50 ohm (51 is OK) resistor. Power only the base K2 (the ribbon cable must be