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On May 8, 2011, at 13:54, "Robert Nezelek" <[email protected]> wrote: > I am experiencing a similar scenario trying to use an external xvrtr with my > Flex 5000. However, when I select my 1296 xvrtr it works ok. I have been > very busy lately and haven't spent much time trying to resolve the problem. > > Bob W2CNS > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Ed White > Sent: Sunday, May 08, 2011 12:14 PM > To: SDR-5000; [email protected]; [email protected]; > [email protected]; Pete M WA2ODO; Paul D. WA3QPX; Mike WB2RVX > Subject: [Flexradio] Flex5000A with V/U with XV-144 > > Hi Gang: > Well the reason for the change back to external transverter is that the > power control is not liner. I only need 13 watts to drive my amp to > 1500Watts If I go up to 15 watts I will have 2000 watts and above that > the "N" connectors will short or blow up. > When I first got the V/U unit installed I connector it up and used a T/R > relay coming out of the back of the 5000A to split transmit and receive. > relay energized gives me receive line active so the entire system is > fail safe to transmit if I loose 12 DC power. > The receiver works well and can see the LNA at the tower. > When I put the 5000A into transmit the wattage was 500 watts I slowly > increased it to about 1400 watts no problem than I was ready for JT mode > When it went into transmit mode things went south quickly and I blew up > a "N" connector and shorted another "N" connector which took out 3 > diodes in the HV PS in the GU78b amp. At this time I was using 2.0.16 > for the 5000A V/U. > I learned that others were having problems with low power Which I also > have can not get the full wattage out of the 5000A. (no problem for me > as I only need 13 watts). I also learned that the control for the power > was not liner on the 144 and 432 MHz V/U. > What I beleave happen was the power output spiked when it went into > transmit and fed the GU78b more than 13 watts which put out better than > 2500 watts maybe even up to 4000 watts from the GU78b. > This of course will not have any problems where you have to run the > 5000A into a 8877 tube which need a lot more power to drive it. Low > power devices could be a problem. > > So what am I trying to do now is run the 5000A into the transverter > XV-144 which I had been using to drive the GU78b before using 2.0.22. > And it will not work? > What happens is I have set up the transverter to work in the third slot > (first slot V/U 144 MHz second slot 432 MHz) > settings as follows: > Enabled checked > UCB 2 > Button tex 2n XV > L.O. Offset116.0 > L.O. Error 0.500( will adjust when I get this working) > Begin fq. 144.000000 > End Fq. 148.000000 > RX Gain 0.0 > RX only no check > Power 87 > Split RF not checked > Input to XV-144 on flex top BNC XV Com > > What happens is when I choose 2m XV and put the antenna into the xv-144 > I get nothing But when it is connected to the 144 MHZ BNC on the 5000A I > get receive. and it also will receive when in 144 MHz BNC when I check 2 > Meter V/U. So the rig will not allow me to use a external 144 MHz > transverter. > > Now worst case is that Flex is still working on the HF problems and will > not address the V/u till 2.1 comes out. which leaves me with a rig I can > not use till then and I can not go back to a 1.x.x because of the V/U > unit connections in the antenna back panel. > I am sure that those running the 5000A at full or almost full out power > into a tube amp that requires high power to run it have enjoyed the rig > a lot. > > So that is my problem and any help will be great. > > Ed > WA3BZT > EME the thrill of hard to work DX > > _______________________________________________ > FlexRadio Systems Mailing List > [email protected] > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ > Knowledge Base: http://kc.flexradio.com/ Homepage: > http://www.flexradio.com/ > > > > _______________________________________________ > FlexRadio Systems Mailing List > [email protected] > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ > Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ _______________________________________________ FlexRadio Systems Mailing List [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
