Hi Steve: Yes, Rothman Modulation is a sort of "clamp tube" modulation where a tube is placed at the antenna output point and the RF is "clamped" to look like 100% modulation. As I recall, it mainly modulates downward to acheive modulation because there is no sideband power from the modulator to add to the carrier. There were Rothman Modulators sold around 1950. They were popular for a while because the CW transmitters could be changed to AM without any modifications to the transmitter. I might try it sometime but I will be sure to put a low pass filter after the modulator (LP on the band selected).
73 , Charlie, K0NG Quoting [EMAIL PROTECTED]: > Hello All: > > It is my observation that there is a goodly amount of 'open' space from 14.3 > to 14.35 MHz. most of the time. > > Conditions are not favorable as 75...but having ample 'elbow room' sure feels > good. > > Would it be worthwhile to consider an AM gathering location there? > > PS: anyone familiar with Rothman AM modulation? > > Happy Holidays, > Steve > WA2TAK > ______________________________________________________________ > AMRadio mailing list > Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:[email protected] >
