I was getting ready to verify the AGC voltage on a one year old working K2 when my probe slipped while trying to read the voltage on pin 5 of U2. The K2 locked up sending continuous dots and no buttons function on the front panel. The dispaly locked up on the last frequency it was reading and the tuning dial has no effect on it. Maybe I shouldnt have done this but I decided to try a master reset just in case. Which didnt solve the problem --- but the k2 did reset. But its still hung up but this time with a dash all the time rather than continous dots. According to the voltage readings on U2 of the control panel, pin 3 has only .27 volts on it. While pin 6 and 7 both read 3.8V. So it would appear that the probe slipping has caused U2 to fail? I can adjust the agc threshold voltage for the proper 3.8V on pin 5. I dont have a spare LM833 on hand to be able to confirm thats what happened but it would appear so. Am I the only one who has had the probe slip on U2 while trying to read the AGC Threshold Voltage?
Frank W7is _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
