All posts by N1FDR

Yaesu System Fusion

From the desk of Frank Ross N1FDR. I have a Yaesu WiresX node which is coordinated with the K1BKE repeater. The node number is 30907. It can be accessed VIA the club repeater by any Yaesu radio capable of WiresX in the DN mode. Up to the rptr then down to my node and back to rptr, into your radio. Instructions on how to do this are available for your radio on the Yaesu website under the WiresX manual downloadable. Usable radios are the FT-991, FT-991a, FT70, FT1, FT2, FTM-100, FTM-400, the FTM-3200 will not do WiresX digital. 3/27/18 The FTM3200 with the latest firmware update will be WiresX¬† capable. As long as (or when) the node is connected to a “room” you will be able to join in on the conversation, which could be with stations all over the world. Frank Ross N1FDR@ARRL.NET (more…)

VSWR In radio engineering and telecommunications, standing wave ratio (SWR) is a measure of impedance matching of loads to the characteristic impedance of a transmission line or waveguide. Impedance mismatches result in standing waves along the transmission line, and SWR is defined as the ratio of the partial standing wave‘s amplitude at an antinode (maximum) to the amplitude at a node (minimum) along the line. The SWR is usually thought of in terms of the maximum and minimum AC voltages along the transmission line, thus called the voltage standing wave ratio or VSWR (sometimes pronounced “vizwar”[1][2]). For example, the VSWR value 1.2:1 denotes an AC voltage due to standing waves along the transmission line reaching a peak value 1.2 times that of the minimum AC voltage along that line. The SWR can as well be defined as the ratio of the maximum amplitude to (more…)