A QRP antenna tuner currently being offered via an Chinese eBay store comes with the following operating instructions:
Connect the antenna, day and transceiver is in order, day the TX receiver transmitter, ANT antenna;
Sets the transmitter to the CW, AM or FM mode, and the rf output power regulation within the range of 1 to 2 w;
Dispatch day mode switch to the most cerebral sci-film file;
Coarse adjustment: first rotating BAND switch on the front panel, to observe the changes of SWR indicator light and shade at the same time, make the SWR the dark when light is relative to other gear;
Fine adjustment: adjust the most cerebral sci-film respectively, the ANT and the most cerebral sci-film, TRX capacitance, when tuning to observe the changes of SWR indicator light and shade at the same time, when the light is the most
When the largest standing wave antenna system, when the light is the most dark and even put out is the minimal standing wave;
Dispatch day, after the completion of tuning mode switch to BYPASS, transceiver can enter the normal working condition.
If you need to switch to other band work, repeat 2-6 items;
Note: if you do not use in day own LED standing wave standing wave bridge detection, please directly transfer mode switch to BYPASS gear as an ordinary day.
It boggles my mind that anyone would buy one of these when that time-proven workhorse, the Emtech ZM-2, is still out there. It allows the use of either balanced or unbalance transmission line.
Even MFJ offers a better choice (did I actually say that?!) with their MFJ-9201.
Instructions for both of the above are in actual English and both are fully supported by their manufacturers.
Given a choice, why do some people sometimes prefer an inferior product at a higher price?