Topband: BOG SOME NOISE

[E.P]

hello i have a BOG that work great however i notice there is some time noise come and go on 80m special sound like a generator i still can receiver i look on all aspect of noise inside the house and out i did test it with other antenna when the noise appear and with other antenna no noise i use this BOG Beverage On Ground Antenna Matching Set - PileupDX.com it is 50 ohm coax 
is any one may know what it can be i do not get this noise on 40m but on 160 i do hear it but low i trace this i think i get it 59 noise on 1.742Mhz  any tip will help again i do not have this noise from other antenna . thank you vy 73 elan g0uut
  
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BOG Beverage On Ground Antenna Matching Set - PileupDX.com
 Beverage On Ground Antenna. Single-wire, single-direction beverage feedpoint transformer and termination set for...  |   |

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