So what is an RF dummy load?, a dummy load is a device used to simulate an electrical load, it is used to simulate an antenna in an RF system. A dummy load is an indispensible tool for the novice as well as expert ham. Since I didn’t have one, a hunt was on to source the parts to build a dummy load. If you change the resistor value or type you will have to change the capacitor values to match the resistance and inductance of the resistors used in the low pass filter. This general purpose, wideband dummy load allows bench-top testing and alignment before connecting to the antenna. All materials cost about £30. Surely any self-respecting amateur radio station would have a decent 50 ohm dummy load, I hear you ask incredulously. A simple RF attenuator is shown in the photo below. Probably many times! T he 50 Ohm dummy load is an indispensable accessory for any radio transmitter. Elecraft DL-1, MFJ-261) to submersion in non-conductive oil baths (e.g. High power dummy loads are expensive diy with a bit of water and a halve teaspoon of salt ! The QRPGuys Dummy Load/Power Meter is a 50 Ω, 12W rated terminated load that is useful tool when setting up or diagnosing most low power transmitters. The home of ALL things Radio - CB, 11m DX, Amateur, PMR446, PLD, Network and Data. Included is an on-board RF detector allowing accurate transmission power calculations. Some of them being of gigantic measurements, some of them are even drowned. This watt meter will be able to measure power from 300nW to 30W @ (0-500MHz). The photo of the plot shows the return loss from 3 MHz to 50 MHz. Would you like to react to this message? I do have one at… You’ll need a small 3/8-inch rubber grommet, to serve as a vent, as well as about two feet of #18 tinned solid wire. As admin cant be bothered to put my contribution to making a dummy load which I ask for to be put in this section. It's a simple PCB design that has pads for SMA edge connectors at each end, a ground plane around the whole board, and pads for placing SMT components in arbitrary combinations to build up filters, attenuators, and amps for RF … If an accurate 50Ω dummy load is available in the shack, we can measure RF power by measuring the RF voltage developed across the load. You choose the RF connector; type N or UHF female are the most common and flexible. I had a 0-2a Weston, mounted in a Mini-box, with very short leads to the SO-239 jacks.