Sorry, I forgot as precaution: set output power to low value (eg. 10W) before transmitting in high-swr antennas Best regards Martin
----- Original Message ----- From: "Christoph - HB9AJP" <[EMAIL PROTECTED]> To: "Wallace Watson" <[EMAIL PROTECTED]>; <[email protected]> Sent: Tuesday, December 06, 2005 10:25 PM Subject: Re: [Flexradio] ATU not tuning > Hello Wally, > when hiting TUN the carrier gets on (10W), then comes the red led and after abt > 1s the red goes off. After a fraction of a second the red geos on again while > the relays start clicking. After abt 1s the green led starts to flicker. Then > the relays stop clicking and at the same time the red gets off and the green > stays on permanently. Then the carrier gets off and after a fraction of a second > the green led gets off. During the whole time the VSWR stays unchanged (e.g. > 1:3) and the power meter moves a little bit. So I guess the behaviour of the > tuning cycle seems to be ok but still it does not tune. (I also located and > checked the jp1 jumper pads: the resistance reads infinity). Any suggestions? > 73 Chris, HB9AJP > > > Wallace Watson schrieb: > > Greetings Christoph, > > I also experienced the problem you have described when I obtained my > > SDR-ATU and installed it in the SDR-1000 in May 2005. My version of the > > ATU did not contain the red and green LED's which indicate the status of > > the ATU. After several exchanges with Gerald Youngblood, he advised > > that several of the early ATU Z-100's obtained from LDG were assembled > > without the addition of these LED's. This I corrected by obtaining the > > LED's from Gerald at Flex-Radio and installing them on my ATU unit. > > > > In order for the ATU to function correctly, you must be using PowerSDR > > verion 1.4.5 Beta 6 or later due to a software bug discovered in the > > earlier versions of software. What indication on the RED and GREEN > > LED's are you observing when you tune the SDR? > > > > The problem that I eventually discovered was a solder bridge short on > > the bottom of the 100W Amp board at the point of the ATU jumper pads. I > > read a .2 ohm short with the jumper cut and should have read infinity on > > my digital ohmmeter. I discussed this discovery with Gerald from > > Flex-Radio and we concluded that a short must exist, Gerald advised the > > procedure for removing the 100W amp from the SDR case and removal of the > > printed circuit board from the Amps heat-sink. Upon performing this > > disassembly I found a blob of solder bridging the jumper pads on the > > bottom of the 100W Amp circuit board. I removed the solder bridge and > > reassembled the AMP circuit board with the heat-sink and remounted the > > Amp in the SDR radio cabinet. The ATU then performed flawlessly when > > tested subsequent to this troubleshooting and correction. > > > > I am presently on Holiday at my future retirement home in Florida until > > after Christmas, after which my spouse and I return to the U.K. and > > resume work. > > > > Advise if I can be of additional assistance in troubleshooting your ATU > > unit? > > > > 73's, Wally - M0ZAZ. > > > > > > > > > > > > At 09:12 PM 12/4/2005 +0100, you wrote: > > > >> My ATU is not working properly: I hear the relays but when finished, > >> there was > >> no tuning. Is there a way to test the ATU manually or is there a > >> toubleshooting > >> procedure? I am using the sdr-100O with 100W and ATU installed, > >> purchased in > >> September 05, Delta44, v1.4.5 Beta7. Actually it never worked until > >> now, was not > >> sure from the readings if I still should wait for updates(?). > >> Chris, HB9AJP > >> > >> _______________________________________________ > >> FlexRadio mailing list > >> [email protected] > >> http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > > > > > > _________________________________________ > > Wallace A. Watson - [EMAIL PROTECTED] > > _________________________________________ > > > > > > _______________________________________________ > FlexRadio mailing list > [email protected] > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
