Clay,
I am curious, when you ran your rig from the battery and still
had high noise levels, were you in any way still connected
to the generator (say via the AC line safety ground for instance,
or any other common ground connection)?
Mike, W4EF............................................
----- Original Message -----
From: "Clay Curtiss W7CE" <w7ce@curtiss.net>
>I forgot to mention that there was only a few db (less than 1 S-unit) of
> noise difference between the end-fed wire that I had been using and the
> balanced dipole.
>
> ----- Original Message -----
> From: "Clay Curtiss W7CE" <w7ce@curtiss.net>
>
>
>> I ran some more tests over the weekend. My antenna was a 50' high, 50'
> long
>> dipole center fed with twin feed through an antenna tuner with an
>> internal
>> 4:1 balun. With the generator running and my Icom 746/PS15 connected to
> it
>> (through the cabin wiring), my noise level on 20M is about S9. When I
>> connect the 746 to my truck battery the noise level drops only slightly
>> to
>> S8+. When I turn the generator off, the noise level becomes almost
>> non-existant with just atmospheric noise. Unfortunately, I forgot to
> check
>> the noise level when the generator is running but disconnected from the
>> cabin. I'll try that this next weekend. Also, the noise level is
>> definitely higher at some frequencies. At this point I'm pretty sure
>> that
>> what I have is common-mode noise that is being radiated by the cabin
> wiring.
>> If I'm correct, then I should see lower noise levels when the generator
>> is
>> running but unplugged from the cabin. Now i just need to decide whether
> to
>> purchase a commerical RFI filter or build one with a couple of toroids.
>>
>> Thanks again for all of the helpful suggestions.
>>
>> Clay W7CE
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