measured with analyzer MiniVNA
measured two antennas with the antenna analyzer (mini-VNA).
That were the
RoomCap 40m and the RoomCap 80m.
40m Roomcap installed on the car as seen on the beginning of
this homepage here.
see the resonance frequeny at 7.040
MHz with bandwidth (SWR= 3) of 149 KHz.
The resonance frequency may be set in seconds to any frequency on the
band, keeping the same low SWR.
This is done by using the RFA (remote frequency adjustment).
80m Roomcap on the roof built and installed by HB9BPP
you see that resonance is at 3.650 with a bandwidth (SWR = 3) of 44 KHz.
The resonance frequency is also set by the RFA to any
frequency of the band.
This antenna is not adjusted to lowest SWR.