[Lowfer] CFH

w1tag at charter.net w1tag at charter.net
Sat May 26 20:06:36 EDT 2012


Just to point out a quirk about the Icom R75's noise blanker - just in 
case someone else in this part of the world has this problem. Up here at 
the camp in Maine, there is a steady LF buzz coming from the lovely 
single-phase power service. The R75's noise blanker does a very nice job 
with it, but this year I have hardly been able to copy anything in the 
137 kHz band. It turns out that the issue is CFH on 137.0 kHz, which has 
lately been running full-time with few breaks. While it isn't in the CW 
passband while I'm listening at the top or bottom ends of the band, the 
noise blanker passband is much wider, and CFH really fouls things up. 
During their rare off periods, reception returns to normal. 
Interesting, but a pain in the neck!

John, W1TAG


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