[AMRadio] cyclic noise

Bill Guyger bguyger at yahoo.com
Thu Oct 8 18:41:59 EDT 2015

FWIW Harp is dead. Air Force started dismantling the site and University of Alaska said hold the phone we'd like the gear. I think some form of deal was struck but a lot of the gear is already gone.


Sent from my iPhone

> On Oct 8, 2015, at 5:33 PM, Bernie Doran <qedconsultants at embarqmail.com> wrote:
> I asked a few weeks ago if anyone has noticed the cyclic noise that I am hearing. It appears to be continuous from about 2MC to above 15 MC
> usually runs about 6db increase on 40 and the same on 20, lower on 160 and 80, However sometimes 40 or 20 will be 12 db. Nothing close to me to do this nearest home is 1/4 mi.  yesterday it stopped at exactly 3:45 PM EDT.  any day of the week and just about any time. it would take enormous power to cover this freq range.  The repetition rate seems to be a bit faster that 1 CPS.  I am suspecting that this is scatter with occasional sky wave that causes the big increase on  one band.  The only thing that has this sort of power is HARP and they reportedly do operate from 2 MC to 18 MC at 350 Meg watts. I saw one report from a ham 5000 mi away and they pegged his s meter in mid day at about 3.3 MC. I can watch the s meter slid up and down, background noise here is about S4 on 40 daytime, and turning of the AGC it is easy to hear the rise and fall. I probably am 6500 mi away from HARP( mid Ohio)  Would be interesting to look at the actual noise wave form and see if it might have some info in it. Why do I care?  Simply because it is there, and man made, and I wonder what it s.
>            Bernie W8RPW
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