Hello I am looking for some help I am new to using amplifiers in Ham radio I
have been a ham for about 12 years but have just started using a amp. I have a
ten tec Jupiter and use two antennas 1) a tenadyne LPA up at 65 feet tower
is 150 feet away from the house. this antenna is for 10,12,15,20, mtrs . swr
averages at 1.4 : 1
2) A Carolina Windom by w4cox up about 40 feet and vertical portion about 50
feet away from the house with one of the legs of the dipole running over the
houseabout 18 feet above the roof . this antenna covers the remainder of the
bands minus 160. with out the amp both antennas work fine however when I use
the amp the LPA beam works fine but the Carolina Windom doesn't work well on 40
or 80 meters. when used there I am told and I have listened to the audio , I
have a bad flutter to my audio once referred to as the sound of a machine gun .
Also when I tune the amp with low power on 40 or 80 I get a pulse sound that
sounds like it comes from the amplifier . The sound makes noise like sending
cw dots from a keyer at about 15 words a minute when this happens the meters
still look good where they are supposed to be . I have all my station
grounded , I have checked all my jumper cables for shorts , ( although two
patch cables are at about 6 feet too long ? ) when using the Carolina Windom I
use a Nye Viking antenna tuner to get a flat match ( about 3:1 on 80 and 2:1 on
40 meters with out the tuner) my centurion is about 4 years old and I was
instructed by TT to complete the mod needed to use with newer radios ie. jumper
the diode etc.( mod completed ) by using the load and tune controls on the amp
I can make these sounds go away but power put out by the amp goes down. when I
tune the amp for no crazy noise the audio is still fluttering . and by the way
my satellite tv on the upper floor is now bothered by TVI . the phone is not
affected. The mic gain is at about 14percent and the speech proc is off on the
Jupiter . sorry for the long post . any and all help will be appreciated .
John
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