I have the u908 (AA908) Antenna Analyzer. It comes as a very nicely packed kit, lots of SMT components with an excellent instruction manual.
The case is approx 7" x 5.25" x 1.5" and made of ABS(?) plastic. The complete unit consists of a Mother board, a DDS daughter board, a microcontroller board and a (KK7P) DSP card. The software is user up-gradeable running a terminal program on your PC (which I have done three times), and can change the function of the unit. Right now it is configured as an antenna analyser. It has manual and automatic modes, and can scan between user selectable frequencies. On power up. It defaults to impedance mode but can be selected to run in inductance, capacitance or VFO mode. I have tested it on antennae, coax, discrete capacitors, inductors and resistors, and it seems to work very well. The unit will actually be able to run as one of five different configurations - currently it is an antenna analyser, next application to be released is (I believe) an DSP audio filter application (AF908) similar to the K2DSP (using Lyle's excellent unit), and then(?) a PSK31 software program for Portable PSK using a small accessory keyboard. Internal batteries are 8 AA's - if NiMH cells are used, there is a jumper in the unit that will permit them to be charged while the unit is plugged into an external 12V source. The only current limitations(?) I have found so far are; 1. frequency range is limited to 1 - 30 MHz in three decade switched bands, 2. SWR maximum indication is 10:1 3. Impedances greater than 600 Ohms cannot be accommodated. Usual disclaimers, no financial interest, just a satisfied owner Dave KK7SS Dave KK7SS AMSAT #35359 DN06ig Mail is Virus checked , both IN and OUT _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
