Yeah cb'ers dont care about IMD. Put your bandscope on the CB band and you can see the end result stupid behavior and equipment choices.
Not all dx'peditions are inconsiderate ham citizens who set about selecting equipment that causes deliberate interference.
Most expeditions do meticulous research on selecting quality and reliable equipment. Using 12 volt CB or mobile ham amplifiers would rate as a very idiotic decision purely from a reliability point of view. This is before we consider the poor CW timing and other issues like ALC induced splatter from using such poor equipment.
Most serious dxpeditions are a team effort with considerable resources. I dont know of any dx'pedition that has selected cb or 12 volt amplifiers for a dx'pedition.
Frankly I cant recall a recent dx'pedition that had a horrible splattering signal. Most are smart enough to select well engineered equipment.
I have heard plenty of IOTA and 1 man expeditions that uses a Icom 706 and a RM Italy CB type amps and their signals are normally horrendous.
Contesters will worry about IMD and keyclicks when someone comes alongside their dx'pedition and causes QRM to their operation. Having equipment with high technical
standards services the interest of all hams. But I suppose if you want to be a dirty LID there are many ways you can go about doing this even with good equipment.
Fortunately most hams want to be 1st class operators and select equipment that has the best technical performance and show technical aptitude that is above
a brain dead CB op whose sole intentions is to cause mayhem to whoever uses the band. It seems you cant take the CB operator out of some hams when it comes
to their equipment selection and operating behavior. Certainly not caring about the quality of your signal ranks as appalling behavior for a ham who is is supposed to
be technically literate.
Well I suppose of nobody cares about dx'pedition other hams can also have a recalcitrant attitude and operate on top of them causing deliberate interference.
This is not the behavior expected from most hams. But if thats the slippery slope and attitude that you are suggesting should be the normal selfish operating procedure for hams; then I cant agree with you. I still believe most hams want to be gentlemen and maintain the ham ethos and code of conduct. This code of conduct should also include selecting and using equipment that does not causes unnecessary interference. Why is this too much to ask for if you dont want to be selfish SOB?
Radios and amplifiers are getting better. If hams made better technical consumers are asked the question "how clean the transmitter is" eventually this wont be a issue.
These days any serious off grid or rural PV system will be running 48 volts or higher. You can run a nice clean FET amplifier of a 48 volt PV system.
The last thing a rare dx'pedition wants is a band full of splatter from sub standard radios and amplifiers that will make their lives much harder. I just cant understand
why hams find the subject of poor IMD so hard to digest. It simply means less QRM on the bands which should be of the interest to every ham on the planet.
The size of an amplifier on a dxpeditions is the least of your worries. Most dxpeditions I have been on ship everything in a cargo container. Reliability is another question. Antennas break, power fluctuations, shipping vibrations and operator error are what kill amplifiers.
For rural operations it is great to have the whole station run from 12 volts. You can always find a truck for power back up.
Oh if Zinki is lurking out there.....nobody cares about IMD on a DXpedition.
For amplifier reliability you always drive the amplifier with lower power.