+++++++++++++++++ Date: Wed, 02 Jan 2002 12:15:32 -0500 From: Jim Campbell To: DolfinDon at aol.com CC: elecraft at mailman.qth.net Subject: Re: [Elecraft] KIO2-Induced Problem Don, Bingo! Give the man a cigar. I didn't go through the S-Meter calibration because the RF Gain control had no effect on the S-Meter. Pin 5 of P1 measured 4.16 volts regardless of the setting of the RF Gain. The pin 6 voltages were as you predicted, i.e., OK. I then removed the Control Board and found that I had soldered the end of the 4" jumper and the capacitor to one side of the line of capacitors C2, C3 and C4. (I had mistaken the line of capacitors for the back side of P4.) I'm ashamed to admit the error, but in doing so I might help someone else. When I moved the jumper and capacitor to the correct pins on P4, the problem went away. Thanks so much. Happy New Year to all! Jim W4BQP K2 #2268 DolfinDon at aol.com wrote: > Go back and check the smeter cal on page 46 of the manual. If the cal is OK > then recheck all of the modifications to the control board. Make sure you cut > the right run and have all if the jumper wires installed right. Measure the > voltage on pin 5 of p1 on the control board. This should be about 3.9 v with > rf gain cw and 4.15 with control ccw. If not check pin 6 of p1 RF gain input. > The voltage should be 0.0 with gain control cw and about 2.4 v ccw. If all > is OK at p1-6 but not at p1-5 then look around U2 and Q12 for a problem. In a message dated 1/1/2002 10:15:34 PM Central Standard Time, jim-c at nc.rr.com writes: noticed that the bar-graph display on the front panel was at a steady +20. I tried lowering the RF Gain control to see if that caused a change in the bar-graph. It did not. Also, the RF Gain control has no effect on the volume in the headphones or speaker. The overall gain doesn't seem as loud as it did, but this is subjective. ++++++++++++++++++++++