Hissing could be a lot of things, such as electric fences, bad power supplies, bad fluorescent ballasts, and many other things.
The 1st thing I would do is unplug the antenna. If it goes away, it's probably not your radio or a power issue coming in on the power cable.
If it doesn't go away, then I would kill the power to the house and start turning things on 1 breaker at a time. If the mouse is coming from your home, that will help you identify what it is.
Hope this helps.
73,
--Hank
KB4MTO / TA5ZC
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On November 10, 2022 11:19:11 PM EST, Easwaran Unni Tharakkal VU2TE <unnitharakkal@...> wrote:
Recently my 857D started giving too much noise on 80 Mts since few months. Is it due to condx.? or any thing related to the rig ? I tryed instaling a new ZS6BKW. still no use
It is a type of hissing noise. TX report from the other end is 59 to 59+. What can be the cause. Request suggestions
Thanking you all in advance
VU2TE
Unni?
