I had a similar 90 KHZ ish periodic noise from below BC band thru 10 mhz, and it turned out to be the cheap float battery charger on my neighbor's generator---about 1000 Ft from my home. Replaced it and noise is gone.
Ned WC4X Ned Mountain [email protected] 770 823 4205 (M) _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
