ICOM R-75 Filter Questions - Need Advice

[FreqMgr]

I have an R-75 with DSP installed that I use exclusively (with exceptionally rare occasions) for monitoring ARINC HF aeronautical communications, which are SSB mode. There are a number of R-75 SSB narrow and wide filter options for the 9 MHz and 455 kHz IF's. Universal Radio suggests that users who primarily enjoy shortwave broadcasts may wish to add both the FL103 and FL257 filters, $89.95 and $159.95, respectively, from Universal Radio. As I'm not interested in shortwave broadcasts, which as far as I know are nearly all AM mode, do I need either or both filters to improve the overall reception quality of ARINC/aircraft SSB communications? I'm not really having any problem hearing either ground or aircraft stations, other than normal weak reception on given frequencies during given times of day. I'd greatly appreciate any comments/advice anyone can offer. The filters are expensive, so I want to ensure that installing either or both will result in significant signal improvement in one or more respects.

 

[n2pqq]

If i where you i would look at the yahoo group for this radio. Do a search for filter in the group and you should have a good answer. There are 1536 members in that group.

Also take a look at the kiwa mod upgrade.

http://www.kiwa.com/R75.html



Hope this helps some.

Fred

 

[K2KOH]

I'm a big ARINC monitor as well, and I use a couple of rig to listen in. I have the 1.8 and the 1.9 KHz filters in the R75, and when the nitwits in the fishing boats pop on, I switch to the 1.9 and play with the passband tuning. Sometimes kicking in the filter helps when you're listening to one of the weak ones, like Auckland or Sydney. I've rarely used the 1.8

 

[K2KOH]

One of these years, Fred, I'm going to send my R75 to Kiwa...maybe during the move...LOL