Sorry, but no such luck on the commercial satcoms. Lester B Veenstra MØYCM K1YCM lester at veenstras.com m0ycm at veenstras.com k1ycm at veenstras.com -----Original Message----- .................... It was assumed that the crystals was locked to Cesium or Rubidium, and hence it would chase up the error. Cheers, Magnus