Call the owner/operator at https://mrbi.net/
or more directly with a free cell phone call to: *MRBI Headquarters* 40 Exchange Place, Suite 1010 New York, NY 10005 Tel: 212-966-1059 Fax: 212-625-2894 and let them know of your concerns. It is not a small business. . . They own 39 stations. Curious! You did not mention that the program content was in Mandarin or Spanish. CUL, Jim/VEZ On Wed, Apr 19, 2023 at 10:35 PM Eric Scace K3NA <[email protected]> wrote: > Hi Frank, everyone — > > One does not need another person to be harmed by the intermod on 1940 > kHz > > AM broadcast regulations include a very strict bandwidth mask for any > form of radiated spurious signal more than ±75 kHz from the carrier > frequency. At these power levels, such spurs must be less than -80 dB below > the carrier (measured at a point about 10 wavelengths from the center of a > directional array, usually in the main beam). > > There are very specific measurement procedures to be followed for > compliance. Every AM station is required to measure — and retain a report > of compliance in their station transmitter logs — annually (no more than 14 > months between measurements). The measurement procedures require some care, > a very good spectrum analyzer, and a calibrated antenna. > > If the station is out of compliance, it has 10 days to return to > compliance before notifying the FCC. If the problem cannot be repaired > within 28 days, the station must obtain an STA to continue operations. > > === > > Now, as to the identity of the stations. The FCC’s AM Query < > https://www.fcc.gov/media/radio/am-query> webpage is invaluable for > researching issues like this. > > Rick identified one audible program as from WWRU. WWRU operates 10 kW > daytime with a 2-tower directional array at 40° 49' 13.36" N 74° 04' > 02.51” W. The tower registration numbers are 1040103 and 1242403. At night > it runs 10 kW into a 4-tower array > > A search of AM stations within 3 km reveals, as reported by others, > WKDM on 1380 kHz. [Note: Be careful using AM Query’s “radius around a > lat-long” search tool, as the input must be in NAD-27, not NAD-83 > coördinates.] > > WKDM uses a 3-tower directional array (daytime) at the same > coördinates, and a 4-tower directional pattern at night. Tower #1040103 is > shared by both stations. That means a diplexer is employed to combine the > signals into this tower — and would be the first place to look for > generation of a mixing product. > > === > > What to do? > > Both stations run 10 kW or more. On that basis alone, the chief > engineer of each station is required to be an employee of the station — not > a contract engineer. (The same requirement applies to any AM station > running a directional pattern.) That means the chief engineers will be easy > to contact — just call the station’s main phone number. WKDM’s website is > here <https://www.am1660.com/>, and [email protected] <mailto: > [email protected]> is the general email address. +1-718-352-1660 is the > phone number at their headquarters location. > > If this is unsuccessful, one can escalate to the points of contact > registered with the station license. In this case, a search of the FCC LMS > database reveals both stations are owned by the same company and have the > same points of contact: > [email protected] <mailto:[email protected]> … and the legal representative is > Mark Lipp at [email protected] <mailto:[email protected]> > > If no satisfaction has been obtained, anyone can file a complaint with > the FCC Enforcement Bureau explaining that these two stations are operating > out of apparent compliance, with the support data and information about how > the station management has been unresponsive. The Enforcement staff > maintain contact numbers for each station to use in cases of emergency, and > will follow up (as I have personally witnessed). > > I hope this helps. > > — Eric K3NA > > > > > > On Jan 6, 2023, at 18:03, Frank W3LPL <[email protected]> wrote: > > > > Hi Fred, > > > > We've figured out the mystery, now we need to determine if anyone is > > being harmed by the weak, intermittent intermod on 1940 kHz > > > > 73 > > Frank > > W3LPL > _________________ > Searchable Archives: http://www.contesting.com/_topband - Topband > Reflector > _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
