Adjusting 40 meter tuning extension has no affect.
SOURCE: instructions for a swr meter/cb radio
An SWR meter is used to see how well your antenna is matched to your transmitter output, just like using the correct speakers with an amplifier.
There are usually two readings. FORWARD and REFLECT
or FWD and REFL
Firstly, make sure the antenna selector is in the correct position and set for the antenna you are using.
Next, switch your meter to FWD (FORWARD). Switch your transmitter to low power and press the microphone key.
Next, adjust the CAL knob for the maximum power reading, but not so far that the meter exceeds maximum!
Keep the microphone key pressed and switch to REFL (REFLECT). If your antenna is matched, the meter should now give a low reading. If the reading is very high, you must match your antenna by making adjustments or by using a matching unit.
A poor match will mean a poor signal. A very poor match can damage your transmitter and cause interference.
When you have a good FORWARD reading and a low REFLECT reading, your system will be reasonably matched and you can then use higher power. Remember that you will need to reduce the CAL knob to a lower setting when running high power.
SOURCE: SWR Meter
dont if you got sorted out but sw goes inline with aerial.
cb,patch lead to sw aerial to sw.set sw with variable to to check standing wave calibration.also if you want to use a linear amplifier or a frequency counter you put them inline same way.
SOURCE: SWR Cal meter is stuck
Passing a small magnet in front of the meter may be enough to free it up. It may, however, be an indication of a problem with the needle type bearing on either end of the shaft that supports the indicator or that the coiled indicator spring has broken.
SOURCE: TO SETUP MY SWR, SHOULD I USE THE METER IN THE
Always use an external meter to set SWR. If the ant. warning light comes on it indicates a problem with the SWR. Check it with external meter.
SOURCE: replacement meter swr/rf meter for 25,29 gtl cost
for about 6 bucks on ebay you can get a new meter that lights up in blue i bought one looks cool
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