At 17.16 13/02/2012 -0500, you wrote: >Somewhere, somebody managed to get a TS-940 to transmit down there at around >the 10 milliwatt level out of the transverter port. Ive been looking for >that info but no luck yet.
Ten years a go i managed to pick up the pre-driver output of my FT-990 that way: FT990 ---> converter ---> driver with TDA2030 ----> PA G0MRF with 4 mosfet IRFP450 ---> variometer ----> antenna. The final output was linear (no class D). I transmitted at 10,137 KHz and the converter had a crystal at 10 MHz if you transmit at 10,500 KHz it works but the driver (it is a BF integrate amp) does not. The final stage also works at 500 KHz, with an appropriate low pass filter and a good fan, and i was able to do some test SSB/CW. Here you can find the final: http://www.g0mrf.com/lf.htm and here my construction: http://i4ewh.altervista.org/LongWaves/FinaleLF.htm (my site is in italian language but you can see the pics). If someone is able to design a good driver (5 or 6 W is enough) we can get on the air easy. Paolo I4EWH _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
