You'd be surprised how far an NDB signal can go, especially at night, and
especially when running 1 KW. And with a weak signal on the product
frequency,
it's quite possible.
Mixing products from NDBs have been heard on 160 meters 1,000 miles away
from the NDB, mixing with a BC station hundreds of
I doubt VTR is mixing with a station 230 miles away
On Thu, Nov 19, 2020 at 2:50 PM FRED BELGHAUS wrote:
> 3rd harmonics of NDBs can be a real problem on the 160 meter amateur band
> also.
> Several have caused QRM (interference) to stations there, and had to be
> shut down
> temporarily for rep
3rd harmonics of NDBs can be a real problem on the 160 meter amateur band
also.
Several have caused QRM (interference) to stations there, and had to be
shut down
temporarily for repair. The NDB transmitters are rather primitive affairs,
without much
attention paid in design to spurious or harmonic
