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                   CERTIFIED MAIL - RETURN RECEIPT REQUESTED

   February 23, 2011

   Mr. Arthur D. Visser

   (Address withheld)

   (Address withheld)

   Re: WARNING NOTICE

   Amateur Radio License W9ART

   EB-10-GB-0153

   Dear Mr. Visser:

   By email dated January 10, 2011, the Commission notified you that it had
   received numerous complaints of interference by your station to the Possum
   Net. The complaints alleged that during the ongoing interference, one of
   the Net control operators called your home phone number and keyed his
   microphone while you answered the call. During that call you admitted that
   you had been deliberately interfering with the Net for some time. This
   conversation went out live to all of the participants in the Net.

   You responded to the Commission's email on January 21, 2011, via letter.
   In that letter, you acknowledged that you did indeed interfere with the
   Net and noted that you went to the Net, admitted that you had been
   interfering and stated that you would cease your interfering activities
   immediately. In addition, in your letter to me you further took full
   responsibility for your actions, admitted to poor judgment and apologized
   for your part in the incident.

   Your operation as described above is contrary to the basis and purpose of
   the amateur radio service as set out in Section 97.1 of the Commission's
   rules and a violation of Section 97.101(d). Please be advised that the
   Commission expects you to abide by its rules. This letter serves as notice
   that, if operation of this type reoccurs after receipt of this letter, you
   could be subject to severe penalties, including license revocation,

   monetary forfeiture (fines), or a modification proceeding to restrict the
   frequencies upon which you may operate.

   Sincerely,

   Laura L. Smith

   Special Counsel

   Cc: Chicago Field Office

   Northeast Regional Director

   See 47 C.F.R. S:S: 97.1 and 97.101(d).

   Fines normally range from $7,500 to $10,000.