Radio ToolKit
Radio Engineering Tools
Reference Resources
Interactive Band Plan
40m Band
7.000 - 7.300 MHz
Current VFO:
MHz
Outside Band
Q-Codes & Abbreviations
CTCSS Tone Reference
AU Repeater Offset Predictor
--- MHz
Technical Note: CTCSS tones are transmitted at approximately 15% of system deviation to remains sub-audible.
Radio Glossary
Resource
Antenna Designer
Calculators
Component Design
Geospatial & Location
VSWR Calculator
ERP / EIRP
Watts
/
dBm
Ohm's Law
Enter any two values to calculate the others.
Wave & Freq
dB Calculator
Resistor Codes
1.0 kΩ
± 5%
Network Solver
0.00 Ω
Filter Designer
Enter any two to calculate the third.
Reactance
L/Pi Matching Network
Wire Antennas
Total Length (L)
---
Each Leg (L/2)
---
High-Gain Yagi
Specialized Antennas
Tuning Assistant
Action Required
---
Adjustment Amount
---
New Total Length
---
Link Planning
Space Weather
---
-
-
---
Status: Standby
HF Frequency Prediction
Powered by the Australian Bureau of Meteorology (BoM) Space Weather Services URSL Tool.
Up to 10 frequencies. Center frequencies recommended.
Operator Hub
RBN Dashboard
| Spotter (DE) | Spotted (DX) | Freq | Mode | Type | SNR | WPM | Time (UTC) |
|---|---|---|---|---|---|---|---|
| Connecting to RBN Live Feed... | |||||||
Grid Converter
Distance & Bearing
Distance
---
Bearing
---
Location Dash
------
---
---
---
GPS Signal: Standby
DX Cluster
CONNECTING...
Release to Refresh
Aggregating Cluster & RBN...
Call-Lookup
HamQTH Credentials (Required)
Enter your HamQTH XML API details to enable lookups.