Hello group, Most HF-rigs have a "push-pull" PA that has an input and output transformer. It are most likely these transformers that determine the lower frequency limit. I believe to have read an art
I don't know those particular mods, but my IC746 was supplied (quite intentionally) with all band transmit capability. However, the transmitter is still inhibited when trying to operate below 1.5MHz
Dear all, concerning the beginning of LF amateur operation in Germany I must confess that a very detailed description of the equipment used has never been published but I think that the contribution