Re: [Elecraft] K2 Pwr Out Problems

2010-03-31 Thread Don Wilhelm
David, While it is quite unusual, there indeed could be a problem with the KIO2. Plug in the KIO2 and check the voltage at KIO2 J2 pin 7. It should be from 4.5 to 6 volts (that voltage comes from the KSB2 board). You should see the same voltage at Control Board P4 pin 7. If the voltage is lo

[Elecraft] K2 Pwr Out Problems

2010-03-31 Thread David Douglass
Hi All, My K2 seems to have developed a power output problem. Set-up is a QRP K2, with SSB, internal ATU and KIO2 options. I get full power output on CW OK, but only get a Max of about 1w RF output on SSB. If I remove the top lid, and therefore disconnect the internal ATU and KIO2, I then get