• Get involved.
    We want your input!
    Apply for Membership and join the conversations about everything related to broadcasting.

    After we receive your registration, a moderator will review it. After your registration is approved, you will be permitted to post.
    If you use a disposable or false email address, your registration will be rejected.

    After your membership is approved, please take a minute to tell us a little bit about yourself.
    https://www.radiodiscussions.com/forums/introduce-yourself.1088/

    Thanks in advance and have fun!
    RadioDiscussions Administrators

NJ 101.5's transmitter is transmitting spurs

N

nd2023

Banned
I live 2.5 miles from the NJ 101.5 transmitter, and I noticed spurs around 101.5. 101.1 and 101.9 is completely covered by a spur, and 102.1 has a lot of interference. There's even a trace on 102.3. It's happening on 3 different radios, 1 of them a car radio, and none of those radios got the spurs before. The spur interfered with my reception of Q102.1 10 miles south of the WKXW tower, B101.1 about 8 miles south (both stations got spur interference within their protected contours). CD 101.9 was interfered with till I was 10 miles northeast of the NJ 101.5 tower. Normally, all of the above mentioned stations are listenable right under the tower. The spurs started sometime this afternoon. NJ 101.5 doesn't have HD hash.

A spur is a transmission of a radio station on a different frequency due to problems with the transmitter. It sounds like NJ 101.5 is broadcasting spurs on (estimated) 101.175 and 101.85 (this spur sounds very overmodulated). All it takes is a few watts of power for the spurs to travel far, because the tower is almost 1000 feet.
The spurs are not occurring with 103.3, which is also on the same tower.
 
A spur can be caused by a number of things starting with the main oscialiator, even the crystal. I've seen where if the crystal is not making good contact in the socket it could cause capacitance and make the oscialator transmitt on more then it's main frequency..A bad crystal could cause this even if its soldered in. Then of course it gets amplified from the buffer to the driver to the final's and is your transmitting on many frequecies besides your 2nd and 3rd harmonics. Bad VSWR from the antenna or hardline could also cause this or RF from another transmitter getting into the local oscialator. A bad power supply, causing AC ripple or voltage drop or increase. Tuning too is a big factor. I don't know if your all soild state or tube as final's.

Get the spectrum analyzer out and start with the LO Chief. Good LuckI I heard the transmitter going on and off today.
 
38 watt W272BH, 102.3/Port Republic broadcasts a crystal clear signal on 93.3 that travels well over a mile, nobody seems to care about that either.
 
JerseyShor said:
38 watt W272BH, 102.3/Port Republic broadcasts a crystal clear signal on 93.3 that travels well over a mile, nobody seems to care about that either.
Click to expand...


Yeah with that whopping 38 watts if I were them I'd be thankful for the extra exposure whether its intended or not! Plus I don't believe that Port Republic is even remotely in WMMR's protected contour so aside from a local annoyance to local 'MMR Listeners who really cares? If the FCC isn't concerned about pirates I highly doubt that this is highg on their priority list.

But I must say the "precise detail" from djdala was quite impressive in the NJ 1015 situation! A woman that knows radio engineering...in the words of Billy Ocean "She's Simply Awesome!"

;)
 
If so it's not from the station's own tower

New Jersey 101.5 is on the NJN television tower in Lawrence Twp. So is WPRB-103.3 from Princeton.

The NJN tower is quite easy to spot from Route 1 or I-95/295.
 
Status
This thread has been closed due to inactivity. You can create a new thread to discuss this topic.


Back
Top Bottom