RBI HYDRAULIC BREAKER USER MANUAL. 2. How the Tool Breaks Rock. The following paragraphs describe what happens to break rock when the piston strikes the tool. (A)Contact-Initial Compression Stress Wave. When the piston (1) strikes the top of the tool (2), it sends a compressive stress wave (3) down to the.
And Counter means counter, exactly as in English. Poise means weight. So the word literally means counterweight and that is what a counterpoise is in an antenna system, where it was originally used. Simply put, a ground plane that the antenna system could mirror itself in.
1) Start with a fully extended counterpoise that is 1/4-wavelength long (or maybe a little bit longer). Then tune your portable antenna to the lowest SWR you can achieve (depending on the antenna this is done by using different taps on the loading coil, sliding a sleeve, or adjusting the length of the antenna whip).