At my location having a permanent outdoor antenna is out of the question as the condo rules frown on any type of antenna. So I have a permanent 20 meter dipole in the attic. My out door antenna is a High Sierra Side Kick and it is only out during contests. It is very portable, about 5 inches off the ground and very close to the deck. In other words not a very ideal location but it does the trick for me in the situation I'm in. When I purchased the antenna about 3 years ago I placed 8 radials in the ground I found as I changed from band to band the starting SWR before tuning was anywhere from 8.1 to as high as 15.1. In most cases it would tune down to 1.2 or less but with the high SWR it took some time and tweaking. For some time now I had planned to increase the radials and hopefully improve the SWR. I recently doubled the amount of radials from 8 to 16 and boy what a difference !!! On all bands the SWR starts at around 3.1 or even 2.1 so this antenna work was well worth it and has made my tuning much faster and not the crazy SWR I had started out with in the past with only 8 radials.