The following scan is for a RadioShack outdoor scanner antenna that is
used on 2 meters. Measurements were taken
with the antenna mounted to a 4 foot mast that is attached to a "jump" box
that contains a lead-acid battery and a Yaesu FT-7100 2M/70cm radio.
I have a full size
discone to try but it is in a small bag for easy carrying.This antenna has been
used with little issue other than a bit of feedback to the radio due to the
close proximity to the radio and power cables.
Antenna:
RadioShack Outdoor VHF-Hi/UHF Scanner Antenna (20-176)
Feed: 6 ft
RG/8x
The antenna is centered at 147.400 MHz with an SWR of 1.1
120 MHz to 170 MHz scan

2 meter scan - minimum SWR of 1.09 @ 147.400 MHz

Pictures of antenna on plastic mast

If you have any graphs that could be added to
this site please send them along. I'll post and credit your
information.