Hi Don, Thanks for the input. I checked the current and when I can get it to put out more than a couple watts I get about a 4 amp draw which seems normal.
What I am finding is most of the test voltages are within range but running at the end of their adjustments. Such as the lna at 230 mv where the range is 200 to 275 with 250 nominal. The only way I am able to get more than 2 watts out is to turn up R22 the input rf gain control to the point where it jumps past the 10 volt max to around 18 volts. I feel like it is going into oscillation or something isn't biased correctly. Backing R22 down it jumps to 6 volts and the output drops to 2 watts. I have gone through the alignment process, peaking for output to TP5 and set the input frequency to 222.500 as I am more interested in performance at the bottom of the band. I do know that when I do get the 17 to 20 watts out the PA module does heat up so that is likely why the resettable fuse is going. Not sure where to go next. 73, Dave N6TEB -----Original Message----- From: Don Wilhelm [mailto:[email protected]] Sent: Saturday, June 01, 2013 3:14 PM To: Dave Glenn Cc: [email protected] Subject: Re: [Elecraft] xv222 shuts down Dave, Can you measure how much current is being drawn by the XV222? It sounds like the resettable fuse is being tripped. That could be either due to a fault or due to excessive heating of the PA module. The max output should be reduced for FM operation. In addition - the XV222 was designed for the low end of the band, not higher up in the FM portion. That means that the output Low Pass Filter may be tuned for a cutoff frequency lower than where you were operating. Should that be the case, excessive current and lower output would be a result. 73, Don W3FPR On 6/1/2013 5:00 PM, Dave Glenn wrote: > I have an xv 222 transverter that will shut down after transmitting for > about a minute. > > Using FM for testing. The front panel just goes dark and I need to power > cycle the k3 to get it back. > > > > I am using a K3 to drive both 222 and 432 transverters. > > > > Also, when going through the alignment process, R22 should be between .1 and > 10 volts. When I adjust this the voltage will jump from about 7 to 18 volts. > > > I discovered it had been running at this higher setting and getting about 18 > watts output. When I roll the voltage at TP5 down to the correct range I get > almost no output from the xvter. > > ______________________________________________________________ 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
