| Very good, once cleaned the contacts
||Time Owned: more than 12 months.
|I have two of these units, 250W, second hand. Both measured over 50 ohms (curiously the second one measured exactly 100) until I opened them up and cleaned the resistor contacts. These connections, including the "funnel" ground connection, were covered in a kind of greenish-black sludge. Once cleaned and assembled, it works flawlessly in terms of flatness and dissipation. Mine go up a bit in SWR above 2.4GHz and drop back down at 3GHz, according to my cheap nanoVNA. I have tested a 1kW linear with them and it has heated up after a considerable time. and not too much|