I have a 2M Elecraft transverter which I am using with my Flex 1500. The transverter has almost 25dB of gain.
The problem is that when I take it up on the local mountain, another local station does a real number on the 1500, the transverter seems to take it in stride but it overloads the A/D in the 1500. Now I am not sure I was thinking clearly enough during the last contest to try turning on the 10db attenuator but according to the S meter, the local station was hitting the transverter somewhere around -50dBm. For the record my "neighbor" informed me that I was messing up his 5000 an equivalent amount when we were both on 2M. In going through the Elecraft manual, they detail an option to remove the MMIC (U1 to be exact) which follows the preamp, this should drop the gain of the transverter by around 12dB. In the manual they recommend this change if an outboard preamplifier is used as this will cut down the noise a bit and aid in preserving system dynamic range. The transverter is very quiet and the combination as it currently stands, I can't measure the bottom end of the sensitivity with the Agilent communication analyzer that I have at work - I can't reduce its output to the point where the 1500 with the transverter can't decode the carrier (somewhere around -130dBm). Hooked to an antenna the noise level is at best -110dBm. I am wondering if it would make more sense to remove the MMIC as opposed to turning on the 1500's attenuator. Tom WB8COX _______________________________________________ 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/
