Re: [IRCA] IBOC on Saturday night

[Satya <dhsatyadhana@xxxxxxxxx>]

Hi all:
   
  I'm new to to the mailing list, living in the Seattle area.  I certainly picked an auspicious time to get back in the DXing hobby!  Check out http://www.rwonline.com/pages/s.0049/t.8417.html - terrestrial radio is proving to be fairly resilient!
   
  Last night on my modified Yaesu FRG-100 and Quantum Loop, 810 KGO was hissing over 820 KGNW local, and 1530 KFBK was rendering local 1540 KXPA all but inaudible; I emailed both of the locals today to let them know that someone in their legal footprint is having  trouble hearing them.  Like many, going SSB in the sideband closest to the IBOCer provides the most relief, and I was able to hear 1520 KOKC fairly well on USB.
   
  To combat the hiss, I have started using a DBX audio compressor with an outboard DSP (the MFJ-784B).  The compressor keeps the audio at a nearly constant level, just below the maximum input level for the DSP; this maximizes the DSP's noise reduction capability, since it likes the highest level possible with the least amount of volume variation.  With this, as long as the target station is reasonably above the noise level, the hiss is substantially reduced and target is readable, without the funky digital artifacts from the DSP.
   
  Thanks - Kevin
   
   
   
  
George Sherman <georgesmn@xxxxxxxxx> wrote:
  Some obervations on the E1 with 8" Quantum loop:

640-680 were OK; 690 hiss; 700-740 were mostly OK; 750 WSB S-9+40 readable but unlistenable through hiss; 760 WJR S-9+50 w/hiss; 770 WABC s-9+40 with loud hiss;
780 WBBM S-9+50 w/hiss; 830 WCCO, when I turned the antenna to null WCCO down to S-9+45, hiss from WHAS; 880 WCBS S-9+45 thru loud hiss; WHO-1040 hiss wiping out N-S reception on 1030, which has a station 18 miles from me. Hiss on 1100, 1110 & 1120.

No skywave stations would decode, Is this because of adjacent channel hiss? The Quantum loop has something like a 40dB amplifier, but that wasn't the hiss I heard.

So, did all 50kw stations agree to give up their 750 mi skywave protection so that they could be hissed upon in secondary if not primary groundwave area? 73, George S., MN


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