RF Exposure

As of May 3, 2023, FCC rules require that operators of all licensed transmitters, including radio amateurs, assure that RF exposure does not exceed safe limits.  The limits themselves have been effect since 1996 and have NOT changed.

Here are some links to useful explanatory documents and calculators you can use.  The calculators shown here were independently implemented, but they closely agree in the results they produce.


Design for a 2-Meter TV Twinlead J-Pole Antenna

Design for 2-Meter and 70cm Dual Band J-Pole Antenna Protected in PVC Pipe

2 Meter Collinear J Pole Antenna in PVC Pipe

2 Meter Phased Vertical Antenna

Coax Cable Loss Calculator Web Page


Interfacing your rig and computer via USB ... presentation slides by N6TV

A R D F ... Amateur Radio Direction Finding Information

The QRP Philosophy

Build It! 40 Meter Rock Bending Receiver ... found in ARRL 2006 Handbook

Simple Direct Conversion Receiver ... One Cubic Inch Direct Conversion Receiver by Monty Northrup, N5ESE

S-Meter Chart - GQRP Club Datasheet

Sunspot Propagation Demystified ... by ARRL

Amateur Radio Call Sign Systems ... how call signs are assigned by the FCC

Old! Sooper Shooter Slingshot / Fishing Reel Antenna Launcher Project (formerly in Logger's Bark)

Phil Silas, AD5X, who contributes many technical articles to QST ... click here for his website.