If anyone has a spare 13 KHz filter available, please mail me direct. Thanks & 73, Mitch K7DX / DJ0QN Mitch Wolfson DJØQN / K7DX 10285 Boca Cir, Naples, FL 34109 Skype: mitchwo USA: Home:+1-239-221-9600 - Mobile:+1-424-288-9171 Germany: Home:+49 89 32152700 - Mobile:+49 172 8374436