Repeater Interference as of lately...

Repeater Interference as of lately...

Postby KA1GJU » Thu Oct 13, 2011 9:47 pm

We have an intruder down in Mattipan, MA, running an Echolink repeater only 5khz from our input. Our input is 144.550Mhz and this Echolink station appears to be on 144.555 or 144.560...hard to tell with the old HT I was using up in the repeater shed. I recorded 36 minutes if audio, removed the garbage, kerchunking,and have the Echolink ID clear as day, as well as a few ID of the users..otherwise the chatter is all in Spanish. The call is KB1VKI and has friends down in the Dominican Republic, also licensed. Their slightly off frequency signals 'ride on the coat-tail' of our repeater squelch, until the PL decoder says... "Not a valid PL tone" and clamps down the audio. Otherwise, our system is working just fine and ignor the off frequency Spanish interference.

As of Oct 10th, official notice was given to the New England Spectrum Management Council (NESMC) along with the recordings. Time will tell as to what will happen next.

73 de Kriss KA1GJU
KA1GJU
 
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Re: Repeater Interference as of lately...

Postby KA1GJU » Thu Oct 20, 2011 9:44 pm

Still acting up as of Oct 18th in the evening.
Here's the letter sent to the offender(s)...

October 19, 2011

Robert Perello, KB1VKI
92 Hazelton St, Apt 2
Mattapan, MA 02126

cc: Ed Parish, K1EP, Kriss Kliegle KA1GJU


Hi Robert,

I am the 2m frequency coordinator for New England Spectrum Management
Council (NESMC). I'm contacting you in the hope that we may resolve an
interference problem with the 145.15 repeater located in Kensington, NH.

It seems that you have recently set up an Echolink station transmitting on
144.555 MHz. Unfortunately, this frequency is in the middle of a repeater input
band. The echolink station is causing interference to the above repeater, which
has an input on 144.550. A second repeater located in Boston and with an input
on 144.560 is temporarily off the air but will also be affected when it returns in
two weeks.

NESMC publishes the 2m bandplan for the Boston area at:
http://nesmc.org/docs/bandplans.pdf. If you could move your transmit frequency
to one more in line with the bandplan, I think it would work out the best for
everyone.

The bandplan suggests 145.51 to 145.79, 146.4 to 146.595, or 147.405 to
147.485 for his type of operation. There are other users on these simplex
frequencies, so you would want to find one that isn't being used by someone
else.

Your prompt attention in this matter is appreciated. If you have any question,
please feel free to contact me at (508) 523-6162 during daytime hours.


Thanks & 73,
Bob - K1IW
NESMC 2m Coordinator
KA1GJU
 
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Re: Repeater Interference as of lately...

Postby KA1GJU » Thu Oct 20, 2011 9:48 pm


OK...here's the latest!

Hi Kriss,
My email to WB1M worked...he called KB1VKI who called me this evening.
He was not aware of the bandplan and apologized for any trouble he caused.
I told him the simplex frequency ranges and he is going to move his station.


Please let me know if things get better (or if they don't).


-Bob


KA1GJU
 
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