Power + SWR Meter *** FREE Shipping ***
The main screen features a color change to warn of a poor match. The normally light blue screen starts to turn pink if the SWR exceeds 1.5:1. It becomes progressively pinker until it is bright red if the SWR exceeds 3:1. A bright blue screen indicates the power level has exceeded the safe operating limit of the meter.
A longer press of the button takes you into the menu. This is mainly concerned with setting the parameters for the alarm contact. This feature allows the transmitter to be shut down in the event of an SWR in excess of the limit set. The display color changes to yellow and the transmitter remains in shutdown until manually reset. Unless the auto-reset feature has been turned on, in which case the transmitter is turned on again after 3 minutes and 6 minutes. If the fault has cleared on either re-try the transmitter resumes normal operation, otherwise it is locked out until manually re-set. This feature is designed for unattended beacon operation on the MF and LF bands, where, for example, high winds may cause a temporary high SWR.
The meter may be operated from a PP9 9 Volt battery or similar and taken to the base of a vertical antenna, for example, to adjust a loading coil. The meter works on very low power, so set your transmitter to 1 watt or less output to avoid RF burns.
The meter can operate at any frequency between 130 kHz and 30 Mhz. The calibration factors from the nearest amateur band will be used. This band is indicated on the second line of the main display.