> Dave, AA6YQ wrote: > Do you think its a good idea for amateurs to > transmit 150 Khz-wide signals on HF bands > like 20m that are 350 Khz wide?
Hi Dave, Yes. There are certainly conditions now that would be perfectly fine for 150kHz bandwidth signals to be used at power levels that would not cause harmful interference. There is currently RF digital technology available that can enable >100kHz bandwidth signals on HF to provide many more simultaneous QSOs than our traditional mid-20th century methods are capable of. I predict that in the near future, there will be such advanced radio technologies being used more and more on the ham bands. Through cooperation, goodwill, and planning, new methods can co-exist with legacy modes. Certainly, we can take a lesson from mobile phone technology. As a cellphone RF design engineer, I witnessed significant advancements in spectrum efficiency in that field. It made possible many more users on the same frequency band or channel at the same time, than was ever thought viable when my first cellphone design went to production in 1986. Similar advancement could be forged in ham radio if we open our minds to it and encourage creative talent. 73 Bonnie KQ6XA
