John, Try putting a low pass filter in the 28 MHz output path from the K60XV. Most any with a cutoff frequency above 30 MHz will do. Sometimes the transverter couples a bit of its output frequency energy back into the K60XV and overwhelms the power detection circuit. If that happens, the K2 'thinks' it is putting out the full 1 mW when in fact the actual power out at 28 MHz is quite low.
To verify that is the problem (rather than a problem with the transverter), re-plug the jumpers in the transverter for high power input and try using the BNC connector on the K2 to drive it. If the transverter works in that configuration, you can surmise that the K60XV power detection is the problem. One of the small in-line low pass filters will cure it. 73, Don W3FPR John Hoaglun wrote: > Config: K2 (10w, SSB, K60VX, 160m, tuner, rs232) > > I have three transverters but I have had very different setup > experiences. I am getting tired tonight so I have not doubt that I could > be missing something obvious. > > My new XV144 was a very simple setup. The whole process took less than > 30 minutes and is came up without any issue. > > I have an existing XV222 that was on a different IF rig for several > years. I am reconfiguring it for the K2. I am getting virtually no power > out of the XV222. No matter how many times I go back thru it I am > getting the same result which about 15dBm. No combination of bandpass > adjustments + PA bias + attenuator bring it up to where it should be. > > My new XV432 is exhibiting the same kind of issue as the 222 > transverter...virtually no power. > > My jumpers on all three transverters are as follows: > JP1: 1-2 > JP2: 2-3 > JP3: 1-2 > JP4: 1-2 > JP5: 2-3 > JP6: 2-3 > JP7: Open > JP8: Short > JP9: 2-3 (leaving the osc run for temp stability) > > 1. My initial feeling was that I am not getting enough drive into the 2 > transverters. I checked the IF drive (in case I messed up the menu > options for the 2 VX's) for 144/222/432 and the drive appears appears to > be about .50mW/-3dBm for all three bands according to my Booton power > meter. > > 2. That would lead me back into the transverter to adjust R22 (Input > Atten Adjust) but that did not help. > > 3. That would lead to look at the jumpers (above.) I think that those > are the correct values for a 1mW configuration. > > 4. Maybe there is something wrong with Q6 (what is the chance that it is > an issue on 2 rigs?) > > > Thoughts & suggestions? > > Please CC me direct in your response as I get the digest version of this > list. > > Thanks, JH > > ______________________________________________________________ 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
