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Good on ya Stella, do not give up, look at  it as an opportunity to learn.


 I am fond of telling other op's I assist that NO I do not know all about anything, but I sure have made about all the mistakes there are to make.


 Going to the choke. I believe it is 5 1/4 or 5 1/2 turns on a 4 inch diameter.  for 27 mhz, 

Anything close will do per say ( let the bashing begin).


 SO let's play with the choke while you have your antenna down.


 Say mount the I2K on a  10 foot pole make it easy for you to raise and lower. Need at least a 9 foot pole for counter poise, I2K uses your coax as the other half of the antenna. By adding the choke at the feed point you take your coax out of the antenna counterpoise thus your antenna mast/pole becomes the other half per say.


All the above changes if you have ground radials on the I2K, so will the bandwidth.


 Take your readings on ch1,ch20 ch40 write them down.


THEN insert your choke  close to the feed point, DO NOT CHANGE tuning rings.


Once again take your readings on CH1 CH20 and CH40.


 Compare the readings and see if there is any VSWR difference.