I'm relatively new to all things HF, but I've noticed that there is a lot SSB voice activity on 80m, 40m and 20m bands, but in three years of casual operating, I've yet to hear any SSB voice on 17m - 6m.
I'm using a 40m - 10m end fed HW antenna, a DX Commander 80m - 6m vertical and for transceivers, the ICOM 7300 and Elecraft K3S. If this is really obvious to everyone but me, I apologize in advance.
I look forward to everyone's insight and guidance.
73,
Mark WU6R
Well, lets just say, for the time you have been on, propagation conditions for our upper bands 17 and up have been fairly poor. Now that said, you have limited the discussion to SSB operation. Ok. Well SSB is THE worst of the 3 common modes in use Data, CW and SSB. AND furthermore you mention casual operation. Just casually listening when YOU want to in poor conditions with the WORST mode for hearing anything at all equals out to a very low success rate.
Lets go over these three concepts.
If you had been operating the most popular digital mode of all time FT8, you would have heard activity each and every day on all of these bands to one degree or another, yes even 6 meters, during the summer, and a few stray signals even this fall. But you are not on FT8 or CW. You are on SSB the absolute worst mode to hear anyone in these scarce propagation/sunspot less times.
Now lets talk about casual operation vs. being Johnny on the spot on the right frequency's when DX stations HAVE been spotted even on SSB. The openings for these upper bands are very time/place/directional specific. In other words you have to be on the right band at the right time, with an antenna looking in the right direction (your vertical listens in all directions with less gain at all times) to hear someone, AND you have to know that someone is on the frequency for you to find them. Of course with your 7300 you have the luxury of a band scope to make use of to help find signals, but if you will also keep an eye glued to the spotting networks, you have the advantage of lots of help to find these signals.
These openings for these upper bands in a sunspot drought, can be very short, very directional and you can easily miss them. You cannot expect to casually operate and make contacts in these times. Now all of that will change soon. As soon as sunspots come back and solar flux rises, you will be able to casually just tune around and find good DX contacts.
One of the huge advantages of FT8 and why people have gravitated toward it the way they have is because of the difficulty making contacts on our upper bands on SSB, with CW being quite a bit more advantageous than SSB but still not as advantageous as FT8, or even FT4. If the only fact that FT8 activity is all on ONE frequency worldwide, that alone would guarantee more success, but the fact that contacts can be made as low as -24 dB below the noise level in a 2.5khz bandwidth makes it so that contact can be made when even a CW signal could not be discerned by the most skilled CW operator. And SSB signals would be so weak as to be totally undetectable.
So, bottom line, There have been plenty of SSB voice signals on 17, 15, 12, 10 and 6 meters in the last three years, and I and thousands of others have made contacts using this mode. BUT, you are not going to just casually tune across the bands and find them every day.
One advantage we have is using directional antennas, the second advantage is using our band scopes and scanning for signals, and also using spotting networks to utilize the work of others also looking for these signals and third having a knowledge of when each band is open to where and is likely to support SSB voice communications. We use the internet in our ham radio activities to find out these things, we don't just casually tune around. The end result is we make contacts by being on the right frequency at the right time with our antennas pointed at the right place.
The good news is all of this will change in a couple of years, for our upper bands, and your band scope will be so full of signals, and you will be scrambling to figure out what to work first.