Tom, You must obtain a low balance reading before you can do any *valid* power or SWR calibration. If you cannot null with the capacitor, there is something wrong - normally that something is associated with T1 and the other wattmeter components, but you say you have checked those.
OK, the next logical step is to find out for certain whether you have a problem with the wattmeter or the L-C board. Separate the Control board from the L-C board and place a jumper from J4 pin 2 to J5 pin 15 (yes, it is a long jumper - the second pin in from the far ends). Now, with only the Control Board (you must use the ANT1 connector) - connect a dummy load and again try to balance the wattmeter - if you find that the capacitor now achieves a null, look for the problem (likely a relay) on the L-C Board -but if you still cannot null the wattmeter, take another look at T1 and its associated components. 73, Don W3FPR [email protected] wrote: > Just finished assembling a KAT2 for my K2. When I started testing I found a > problem. I only get "HI" on the display in the CALn step, where you are > supposed to adjust for a reading of 000. Reducing power as low as I can go, > I can get a "000" display, but as soon as I increase the power, I get "HI". > I tried CALP and I did get readings that made some sense (a high value for > FWD and low value for REF power) but the FWD was something like 22 watts, > which seems too high. > > I disassembled and reveiwed the SWR bridge section, counted turns on T1, > removed the link on T1 and pulled up T1 to inspect the leads and soldering. > Also verified all the component values and soldering in that area. > > So my streak is over. Thought you just finished assembl, turned on power, > and all this Elecraft stuff just worked! Guess it had to happen. > > Any ideas/ > > Thanks/73, > > Tom, KG3V > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
