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What filters for R75?
I'm very disappointed in the "out of the box" selectivity of
the R75. In case you missed my earlier post, I'm trying to get clean reception of KFAQ (50 KW, 100 miles away), without interference from KNED (1 KW, 5 miles away) which is seperated from KFAQ by 20 KHz. The R75 is not cutting it. So what's the best deal on after-market IF filters for the R75? Need something that's wide enough for decent fidelity, with a shape factor good enough to kill off the interference. -fb- |
funkbastler wrote: I'm very disappointed in the "out of the box" selectivity of the R75. In case you missed my earlier post, I'm trying to get clean reception of KFAQ (50 KW, 100 miles away), without interference from KNED (1 KW, 5 miles away) which is seperated from KFAQ by 20 KHz. The R75 is not cutting it. So what's the best deal on after-market IF filters for the R75? Need something that's wide enough for decent fidelity, with a shape factor good enough to kill off the interference. -fb- One opinion? Your problem isn't the Icom R-75 so much as it is your antenna configuration. I'm not saying that's the answer, but it very well could be the answer. According to what I have read, aside from the DSP, which is usally a "throw-in" in most current sales of the R-75, all the other filters Icom can provide are for SB, RTTY and CW use. Other manufacturers may make a filter for it that would improve AM selectivity, but I still at least wonder if that's really the problem. But again, I admit: while that COULD be the problem, I'm thinking antenna configuration first. I have my Icom R-75 set to tune in 1 kHz steps, and I have no difficulty seperating any adjacent channels (10 kHz) let alone alternate channels (20 kHz). If you are using a turnable loop, and the two stations are at *exactly* opposite compass points of your location, then yes - you've got a nasty problem to solve, there - random wire would be the next thing I'd try. Tony Tony ----== Posted via Newsfeed.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeed.com The #1 Newsgroup Service in the World! 100,000 Newsgroups ---= 19 East/West-Coast Specialized Servers - Total Privacy via Encryption =--- |
FB,
A 'stock' Icom IC-R75 with the "Standard Set of IF Filters" should be able to separate these two AM/MW Stations that are some 20kHz apart with the 'right' Loop Antenna designed for AM/MW Radio Reception. IMHO: 55.5% of the AM/MW Radio Reception "EQUATION" is using a the 'right' AM/MW Antenna with a good AM/MW Radio; and the Icom IC-R75 is a very good receiver for AM/MW DXing. - - - See the Icom IC-R75 Receiver eGroup on YAHOO! GoTo= http://groups.yahoo.com/group/icomr75/ Try a building a One Metre (3-4 Ft) Box Loop Antenna with the R75. - - - See the "Loop Antenna Information Forum" eGroup on YAHOO! GoTo= http://groups.yahoo.com/group/loopantennas/ Or try one of these ready made AM/MW Loop Antennas: * Select-A-Tenna Model 541-M * 27" Torus Tuner AM Loop Antenna * Justice AM Antenna * Quantum "QX" Ferrite Rod Antenna * Kiwa MW Air Core Loop Antenna iane ~ RHF .. .. = = = funkbastler = = = wrote in message . .. I'm very disappointed in the "out of the box" selectivity of the R75. In case you missed my earlier post, I'm trying to get clean reception of KFAQ (50 KW, 100 miles away), without interference from KNED (1 KW, 5 miles away) which is seperated from KFAQ by 20 KHz. The R75 is not cutting it. So what's the best deal on after-market IF filters for the R75? Need something that's wide enough for decent fidelity, with a shape factor good enough to kill off the interference. -fb- |
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