Lil'yeshua,
you may or may not see a small change with the fireup stik one way or the other, i have had mixed reports from friends that have tried them,
some liked the fs99,
i may be misreading exactly what you think you are getting with this 5/8 idea,
the firestik website is the BIBLE of cb technobull, you will be hard pushed to find any antenna site with so much nonesense,
the E-H hammy antenna website is a close second,
they claim 5/8 and 3/4wave, they are loaded 1/4waves, and don't work as well as a full size 1/4wave whip,
if there was any truth in the claims you would need a matching circuit between the coax and the firestik, you don't you just screw them on because they are electrically 1/4waves,
the fireup stik is a loaded 1/4wave on 32.7mhz or about the same electrical length as the original a99 top section,
when you add the fireup stik you still have a 1/2wave a99 that's physically a bit shorter than original,
if it changed the electrical length of the a99 you would need a different matching circuit in the base of the antenna,
you cannot compare two antennas on two poles with a switch like some of their customers did no matter how convenient it may seem at the time,
Fire-Up 99 Antenna
