[SEDXC] Feedback Issue

[Ed]

I just installed a Butternut HF2V vertical for use with my Ten-Tec
Paragon.  During inital adjustment of the antenna, my MFJ-259B is
showing the following on my ideal 40M center frequency (currently
optimized for working 3Y0X on phone):

7.200 - SWR 1.4:1
R = 37   X = 13
Now, when I transmit on 40M I am getting some kind of feedback as I
also hear myself in the speaker on the Paragon.  However, when I
operate into a dummy load there is no feedback.  I also do not have
this problem on 75M.

JT, W6FO - the newbie Extra who should probably be demoted to Novice
---------------------
No "probably" about it.

The antenna is too long. Or if you insist on leaving it at that
"optimized" frequency, insert 13 ohms of Capacitive reactance in
series with the feed. And a 1:1 balun at the feed before the reactance
will cure the feedback.