CB and Amateur Radio Antenna System Evaluator

This JavaScript program evaluates the performance of your antenna system, computing the consequences of SWR and feedline loss.
JavaScript PROGRAM by N6ACH

original program concept done in CPM basic by KC6A and N6NB.

working on adding rf safety calculations from a N6NB basic program.

forward power from transmitter in watts -1VSWR @ transmitter
feed line loss in db( must be in line with other values)  Enter 2.2 for dipoles; add 2.2 for antennas rated in dBd 
Enter operating frequency in mHz 1.8mHz to 2450mHz

reverse power at transmitter -1VSWR @ antenna
forward power in watts at antenna reflected power in watts from the antenna
true power in watts into antenna power in watts lost in feed line
db line loss including EIRP in watts power in watts off the antenna

Coaxial Cable Loss in db per 100ft.
Frequency in Mhz
Coax Style
30 50(6m) 100 (2m) 200 300 400 500 600 700 800
Andrews FSJ4-50B (1/2" Superflex)  1.051.501.842.182.442.692.953.16
Belden 9913 (RG-8 type).65.81.301.802.252.703.003.303.603.90
Belden 9914 (RG-8/U type).81.11.602.402.953.504.004.505.005.35
Andrews FSJ1-50 (1/4" Superflex)  1.852.683.303.924.404.895.375.78
Belden 8214 (RG-8/U type)  1.802.703.454.204.735.275.806.25
Belden 8267 (RG-213/U type)  1.902.703.404.104.905.706.507.05
Belden 8268 (RG-214/U type)  1.902.703.404.104.905.706.507.05
Belden 8242 (RG-9/U type)
Belden 9258 (RG-8/X type)  3.705.406.708.009.0310.0711.1011.95
Belden 84142 (RG-142 type)  3.905.606.908.209.1310.0711.0011.75
Belden 9273 (RG-223/U type)
Belden 8240 (RG-58/U type)

Home Page

Antenna System Evaluator

Dipole-Inverted V Antenna Calculator

Quad Antenna Calculator

J-Pole Antenna Calculator

Dannex HF-Equipment

N6NB Wayne Overbeck

If you have any comments, please e-mail me at n6ach@comcast.net .
73 de Ron