well i think u should save ya money and get a comet variable there worth every dollar .
capacitors hold voltage and are part of the overall tuning on your antenna system . its got nothing to do with keeping ya amp happy , your confusing the people here . dont post unless you can explain in a clear way breeze , u have to be very technical when talking about technical issues . when i installed mine my ohms droped about 6 ohms lower , swr stayed the same unless i turned the variable in . im about 28 picfards with my antenna system on one antenna . between 45 to 50 ohms flat 1.0 on 60 channels before dipping to 1.1 o the higher ones.
it will lower ya angle of radiation to . i put mine on the meter and it said so . im around 15 degrees from the mobile on one antenna .