Hello Don Firstly, my apologies as I am currently experiencing a few mail problems, and this note won't 'flow' as part of the original message thread.
I am very grateful to you Don for your reply. Over the years I can't imagine just how many you have patiently helped. I obviously didn't explain the problem very clearly, but will try and clarify things. J8 is oriented correctly, with the green wire towards the top. I have checked the other end of the cable and confirmed there are no shorts, or open circuits. As you suggest, P4 pin 4 has been removed as part of the KPA100 installation, but I'm not sure what you mean by "Since you have already removed P4 pin 4 for the KPA100 you will have U8 also keyed." No doubt I'm being a little slow, but perhaps you would put me straight? To clarify the symptoms (I hope): With KAT2 *not* connected, the rig will power up and perform normally. With KAT2 *connected*, when I power-up the rig, the S meter goes full deflection, and there is no audio output. However, the rig does allow me to navigate to, and through, the KAT2 options. Since my first post, I have removed KAT2 and re-seated U1 in case the passing years had resulted in a poor connection between chip and socket. As part of that work, the pin mating between the L-C board and control board has, by default, been re-seated. No improvement resulted. 73 Peter G3XJS (In hope!) Don Wilhelm wrote: >Peter, >Is the green wire in J8 positioned toward the top? If not, things will >not work well. >If U8 is oriented correctly, check the other end of the cable for broken >wires and shorts. >Even so, I am a bit confused, you say you cannot power up the K2 >correctly, but you can access the ATU menu. Please elaborate, because >on the surface, those two statements seem contradictory, the ATU menu >will only display -- if the KAT2 is not connected. >You could avoid plugging U8 incorrectly by using the same technique as >the KPA100 ribbon cable - just stuff something in U8 at the pin 4 >location (toothpick, wire, anything that works, you might even glue it >in). Since you have already removed P4 pin 4 for the KPA100 you will >have U8 also keyed. >73, >Don W3FPR >Peter Barville wrote: > Folks > > I'm hoping somebody might be able to point me in the right direction, so > thank you in advance for reading this. > > My K2 is serial number 573, so you can see that that I built it many > years ago. Similarly, I built and incorporated the KAT2 Antenna Tuner > almost as many years ago. However, the KAT2 has not been used for a long > time, as I later moved on to installing the 100W PA lid. > > Although the KAT 2 was working fine when I last had it in the K2 (must > be a good few year ago), when I came to replace the 100W lid with the > KAT2 (and battery) lid yesterday I discovered there is now a problem > with the KAT2. > > With J8 securely and correctly mated with P4 on the K2 Control Board, > the rig will not power up properly. After an extremely brief burst of > (probably normal) sound from the speaker, the S Meter goes to full > deflection, and the rig goes silent. It is as if the rig is in Tx mode, > although there is no RF output. > > I can access the KAT2 related items in the menu but, unless KAT2's J8 > is disconnected from P4, the rig will not power up correctly. > > I am not aware of any mishap having occurred to KAT2 whilst it resided > mounted in its lid, but stored away in a box, but wonder whether anybody > has any suggestions as to where first to look? > > Many thanks. > > 73 Peter G3XJS > ______________________________________________________________ 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
