Quote:
Originally Posted by SiriusHardware
Sticking with the Lincoln + external SWR meter + Aerial combination, try this:
Vary the length of the patch lead between the radio and the meter (if you have a selection of patch leads try longer ones and shorter ones).
Similarly, try adding some length to the aerial coax (use one of your patch leads plus a female-female S0239 barrel connector).
You need to change the length of the coax by a metre or more for this to have any appreciable effect.
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Hi Sirius,
I have 3 different lengths of patch lead for between the rig & SWR meter, & these are the results. Notice the longer the patch lead, the lower the SWR; 8" lead - 5.0:1, ~18" lead - 3.5:1, ~5ft lead - 2.5:1
Turning RF power up also reduces the shown SWR, and when turned up to max' power (10W) the SWR is fine.
I thought I had a barrel connector for connecting 2 x PL259, but I can't find it. What you mention about increasing length is a good idea.
I'm seriously considering purchasing a decent 0-30 MHz LPF as this is looking like harmonics/spurious RF as has been mentioned.
What do you think about the installation of a low pass filter?