Topband: MFJ Noise Canceller 1026/1025

N1BUG paul at n1bug.com
Fri Jan 6 04:01:13 PST 2012


> I wouldn't worry about an S-unit of noise increase, especially on 160.
>
> That's bound to happen with any active device like the MFJ-1025; and with
> the normal BG noise level on 160, I don't think it'll keep you from hearing
> anything.

Many of the DX stations I have worked for "new ones" would have been 
totally inaudible if my noise floor had been an S-unit higher.

Both my present and former MFJ-1026 units had the high noise floor. 
As noted in my post about filters and IMD yesterday, the solution is 
to use a preamp ahead of the noise canceller. You need to feed it 
high enough level from the antenna such that you hear/see no 
increase in noise when the unit is engaged.

73,
Paul N1BUG


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