Mark, Even though TP5 is zero, do you measure power output power with an external meter? What do you see at TP6 (marked TP5 on the schematic. TP6 is at the input of the gain block)
Bob On Sun, Sep 5, 2010 at 5:48 PM, Don Wilhelm <w3...@embarqmail.com> wrote: > Mark, > > I am out of "help" on that one. If you have not already, it is time to > email support at elecraft dot com. > > 73, > Don W3FPR > > On 9/5/2010 6:46 PM, Mark Adams wrote: > > Don, > > > > I rearranged the XV432 to be driven at 5W with my FT817 (my uW IF radio). > > Now, all the tests up to the one originally in question, were fine. I > still > > have 0 Volts at TP5. > > > > What is new: When I rotate R22 CW while feeding 5W from the 817, at about > > 25% rotation of R22, the overload LEDs on the main board light. I > rechecked > > the pin headers and shorting blocks and they are correct. > > > > Myron, > > > > You suggested the following: > > > > 1. Check the bias voltage to the PA. TP5 samples the PA output. Is the > > bias voltage still the same as when you set it previously. > > > > YES. > > > > 2. Check the local LO. If your adjustment of that stage ended up right > on > > the edge, sometimes it will stop oscillating and will need re-adjustment. > > > > The LO starts AOK each time I power it up. > > > > 3. Make sure the XVTR is in transmit mode while making these > adjustments. > > > > YES. It was. All set there. > > > > I found that some adjustments when peaking TP5 voltage didn't seem to do > > much. Even sometimes a bad coax between the rig IF and the XVTR can > cause > > systems like you describe. > > > > I tried 2 different coax jumpers with no change. > > > > 73, > > Mark K2QO > > FN03ra > > > > > > > > On Sun, Sep 5, 2010 at 5:13 PM, Don Wilhelm<w3...@embarqmail.com> > wrote: > > > >> Mark, > >> > >> I am going to guess that you are plagued with the gremlin of 432 MHz > energy > >> getting back to the K60XV and interfering with its power measurement > >> mechanism. > >> > >> Plug the XV432 for high power input and drive it from the BNC on the K2 > >> until you get it aligned. > >> If all goes well when connected that way, put a 30 or 50 MHz low pass > >> filter between the K60XV output and the transverter(s). One of the > little > >> in-line Mini-Circuits filters works well. > >> > >> 73, > >> Don W3FPR > >> > >> > >> On 9/5/2010 4:54 PM, Mark Adams wrote: > >> > >>> Hi Gang, > >>> > >>> Just finished my XV432 expecting to use it next weekend in the ARRL VHF > in > >>> my rover setup. Murphy has hit and maybe someone can give me a hand. > >>> > >>> My setup is a K2/XV60/IO module running xverter duty with an XV222 > using > >>> the > >>> split IF, Elecraft control cable, etc. I've used this for a few years > and > >>> it > >>> works FB. > >>> > >>> Now for the XV432. I am on page 29 running Part VI-Filter Alignment. > All > >>> is > >>> good up to the last checkbox at the bottom right of the page. I key the > >>> rig > >>> and get a 2V. On page 30, I continue with adjustment of L15, L16, L17. > The > >>> readings are changing as expected. Then I go on to FL1 and FL2 to get a > >>> higher reading at TP5. At the first FL and turn of the screw, the > voltage > >>> at > >>> TP5 goes to 0. And that is all. I cannot get volts at TP5. I checked to > >>> make > >>> sure the K2 is putting out power and I have milliVolts at the TX in > >>> connector. > >>> > >>> I did use a small metal Stanley screwdriver to make the fateful > >>> adjustment, > >>> but cannot see how this might matter. It would help to have a bunch of > RF > >>> voltages to check to determine my problem. > >>> > >>> If I do not have this up and running by Thursday, my big rove plans > will > >>> be > >>> shot as I've revamped the rover setup to include this transverter. > >>> > >>> > >>> 73, > >>> Mark K2QO > >>> FN03ra > >>> > >>> > > ______________________________________________________________ > > 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 > > > ______________________________________________________________ > 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 > ______________________________________________________________ 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
