I think this condition occurs because, in my case, I am running quite high power, and it occurs if I slip back to receive while still talking. That is, being a little too quick to return to receive. I had the problem with my previous XV144 too. I have carried out the Q7 0.1uF capacitor mod as recommended by Don and, after a little testing, the problem appears to have gone. I have also lost the strange output indication that I got when there was no 144MHz output for now, although I don't think that can be related. I expect, like all these things, it will return at a crucial moment in a contest when I'm trying to work a weak multiplier! Thanks Don and Season's Greetings! Stewart GM4AFF
-----Original Message----- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm Sent: 18 December 2014 21:31 To: Jeff Uchitjil; elecraft@mailman.qth.net Subject: Re: [Elecraft] XV144 transverter problem Jeff, Your XV144 may be one of those that are susceptible to a false overload indication. It should not be possible to create an overload situation with 1 mW of drive, although it may be possible to create an overload indication if the XV144 is in receive and it senses an RF input. First check the jumper on the front panel board near the firmware IC. The jumper block should either be off or plugged onto only 1 pin. Most likely, it is a false overload indication caused by noise pickup on the front panel COR circuit. Remove the front panel metalwork (the board can stay connected to the RF board) and find Q7. Solder a 0.1uF capacitor between the collector and emitter of Q7. That bypasses the noise and prevents a false indication. 73, Don W3FPR On 12/18/2014 2:12 PM, Jeff Uchitjil wrote: > I just completed my XV144 and everything seems to work with it it, except it seems to randomly trip a relay in it for a split second. Like it is trying to transmit. Occasionally this will result in the overload flashing lights and I have to turn everything off and reset it. The meter on my K2 briefly flashes to full scale when this happens. I have it hooked up with the KX60XV and KIO. > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to stew...@gm4aff.net ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.5577 / Virus Database: 4253/8770 - Release Date: 12/19/14 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
