Icom IC-746

IC-746 FAQ
4 IF Filters
4.1 How many optional IF filters can I install into the IC-746?
There are two (2) slots for optional filters in the 9Mhz IF, and one (1) slot for an optional
filter in the 455Khz IF.
4.2 What optional IF filters are available for the IC-746?
Available filters for the 9Mhz IF include:
Filter
IF Bandwidth SF Typical Use
Inrad 121 9 Mhz 250 hz 2.2 CW narrow
Icom FL-101 9 Mhz 250 hz 3.0 CW narrow
Icom FL-232 9 Mhz 350 hz 2.8 CW / RTTY narrow
Inrad 111 9 Mhz 400 hz 2.3 CW / RTTY narrow
Icom FL-100 9 Mhz 500 hz 2.5 CW / RTTY narrow
Inrad 320 9 Mhz 1,800 hz 1.5 SSB
Icom FL-223 9 Mhz 1,900 hz 1.9 SSB narrow
Inrad 110 9 Mhz 2,100 hz 1.5 SSB
Inrad 123 9 Mhz 2,800 hz 1.5 SSB wide
Icom FL-103 9 Mhz 2,800 hz 1.8 SSB wide
Inrad 306 455 Khz 125 hz 2.1 CW narrow (might not fit)
Inrad 122 455 Khz 250 hz 1.8 CW narrow
Icom FL-53A 455 Khz 250 hz 1.9 CW narrow
Inrad 116 455 Khz 400 hz 1.7 CW
Icom FL-52A 455 Khz 500 hz 2.0 CW / RTTY narrow
Inrad 322 455 Khz 1,800 hz 1.5 SSB narrow
Icom FL-222 455 Khz 1,800 hz 1.7 SSB narrow
Inrad 314 455 Khz 2,100 hz 1.5 SSB
Inrad 109 455 Khz 2,400 hz 1.6 SSB
Icom FL-44A 455 Khz 2,400 hz 1.75 SSB
Icom FL-96 455 Khz 2,800 hz 2.0 SSB wide
Inrad 124 455 Khz 2,800 hz ? SSB wide
Icom FL-257 455 Khz 3,300 hz ? SSB wide
Notes:
The above specifications come from several sources, so they might not be directly
comparable. Also, there are always variations from one manufacturing lot to another. Use
these figures only as a guide.
Page 51 of 113
2003-02-08