KB2LJJ Radio Mods Database
facing you, orient pins to right with filter on its side all the way left against a crystal on the board. I used a thin double sided tape
for attachment and coupled the coax through .01 mf capacitors. There is room for only one filter using this
arrangem
The curves for the Icom 1.9 Khz and the 2.4 Khz crystal filters. The 1.9 Khz more closely resembles the International radio unit
but does suffer some roll off at the pass band on one side. This is probably because these units are mass produced and as long as
certain production standards are met they are sold.
I have to thank George with International radio for the filter sweeps.
The 272 has a 1.7 shape factor and losses the same as the #110. The 110 is shown inside the 272 curve. The 223 has a few dB
http://www.kb2ljj.com/data/icom/ic-706-MKII.htm (27 di 30)23/08/2009 23.05.07
