How to: add a sampler port to your dummy load. MFJ-264 

Would have been much more enjoyable to watch without the music

Blimey the music.

You could just wrap a couple turns around a small ferrite core inside the dummy load, your scope will pick it up fine..

Now I have to do this !

This video is awesome, as long as you mute it. But good info and visuals for making a sample port.

50 Ohm very hard to find nowadays

I wish they came that way ! next time use hi temp red silicone just a small dap. that hot glue will melt when resistor heats up. and you can do this mod on the oil filled one. it is a paint can . They make a line section for sample port. quite costly but good to 3 GHz has N connectors. for HF this mod is great ! I may do it to the 2.5 Kw air cooled one they sell which I have with the oil one. but I have the line section tap . this is great for NANO VNA or TINY SA .can also put frequency counter on tap. AM/FM no audio . just dead key read frequency ! 73's

What is specific purpose of sampler port?

Why the music .to cover your voice