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Re: [TowerTalk] You think you have line noise !

To: Paul Kelley N1BUG <>
Subject: Re: [TowerTalk] You think you have line noise !
Date: Sun, 24 Dec 2006 18:24:12 +0000
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Hi Paul, tnx very much for sharing your experience with us all.  I am sorry it 
has taken me so long to respond but this is the first oppertunity I have had to 
access the net while still away from home.  I will pass this onto my brother, 
it sounds like it is worth a shot.

> > But, in the meantime, has anyone here had any experience with devices like
> > the MFJ-1025?  Are these things worth anything and do they work as
> > advertised?
> I recently purchased an MFJ-1026 in an effort to fight power line 
> noise. It takes a little while to get used to adjusting the 
> controls, but the unit does an amazing job of nulling a single 
> noise. If you have noise from multiple sources, it won't be able to 
> null more than one at a time.
> I might add, however, the MFJ likes a low impedance load because of 
> its emitter follower output stage. It has trouble delivering power 
> into higher impedances. When used with my HF rig, the unit shows ~30 
> dB loss and is totally useless. When tried with borrowed rigs all is 
> well. I am led to believe, therefore, that my rig has a receiver 
> input impedance the MFJ doesn't like. Whether by design or this 
> particular rig is broken has yet to be determined. It would be 
> interesting to know if anyone else has found an MFJ-1025 or 1026 to 
> dislike a particular rig in this manner.
> 73,
> Paul N1BUG
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