[ICOM] Design error attenuator in IC-2200H

[Anders Janis SM4RNA]

Hi all.

I have found a design error in the IC-2200H. The attenuator that is 
activated by turning the squelsh controll to 12 a clock or more, do not work 
during scanning. The attenuator is used to improve receiver preformance when 
strong signals is present. To notice the error select a QRG where a weak 
station is present. Increase the squelch until the station disapear. The 
squelsh setting must be 2 o clock or more when the signal disapere, 
otherwise the error can not be detected. This is important. Then start the 
scanning. Now the scanning will stop momentarily each time it pass the QRG 
with the weak signal, and then continue the scan.

I have been in contact with my Icom supplier and they have tested this in 
their workshop and  they confirm the problem. They have also contacted Japan 
that have tried to come up with a software mod, but in the end it did not 
work. The reply from Japan now is "will be included in next model".

My question is now, have anyone noted the same problem with any other Icom 
that have a attenuator incoperated in the squelch control? I am especially 
interested to know about the IC-2820 and IC-746PRO.

Also I would like to know if anyone know of a working mod for the IC-2200H?

de Anders SM4RNA