[TenTec] New Jupiter on its Way _ A Few Questions

[Bob McGraw - K4TAX]

I agree that loops are quieter.......but so is a dummy load.  Secondly, with 
a loop in the house, I would NEVER transmit with one due to extremely high 
levels of radiation.......a.k.a. brain burners.

A receiving loop has its advantages with directional properties.  That is 
about the only good thing I can find about loops unless they are larger than 
1/2 wave physically.   I realize we all do not have ideal antenna locations 
and in many cases we must "make do" with what is available.  If a loop is 
that choice, then so be it.  Personally, I'd suggest looking at other 
alternatives even to a mobile antenna, a C clamp, and a balcony railing.

73
Bob, K4TAX




----- Original Message ----- 
From: <ny6p01 at gmail.com>
To: <tentec at contesting.com>
Sent: Sunday, April 27, 2014 4:05 PM
Subject: Re: [TenTec] New Jupiter on its Way _ A Few Questions


> On Sun, Apr 27, 2014 at 03:52:32PM -0400, K8JHR wrote:
>> LEE -- AS A LONG TIME RECEIVE LOOP USER... (I have used others besides
>> the Wellbrook and DX-E antennas I mentioned previously, but I don't
>> recommend the others at all) I want to be very clear about one thing:
>>
>> YOU ARE ALWAYS BETTER OFF WITH AN ANTENNA
>> LOCATED OUTSIDE THAN IN.
>>
>> The "magnetic" loops are 'quieter" but that is a relative term.
>> Unfortunately, they are NOT IMMUNE to EMI/RFI and the rest of the
>> electrical hash one encounters in the modern domestic environment.
>> There are no free lunches... darn it, cause I LIKE to eat... and
>> "better" or "quieter"  does necessarily mean you will be out of the wood
>> on YOUR particular noise problem.
>>
>> My Wellbrook loop is down now ... I took it down last summer, as it was
>> too close to the transmit antennas to suit me.   Maybe I will mail it to
>> you to try for a while and see for yourself if it helps you situation.
>>   It worked well for me, but maybe it won't cut it in your location.
>> Antennas just seem to work that way, I guess.  You wanna try it?   All
>> you need is coax line and a way to hang a big circle of wire...  any
>> traction?
>
> Well, that's a generous offer, JHR. I am tempted to take you up on it. 
> Only
> problem is that I plan on employing it on the same mast with the
> transmitting antenna. Is that bad practice? The reason is that I am not
> allowed an outdoor antenna, and I live in a small flat.
>
> I would love to get something in the air, though. I am thinking about
> building one myself according to Rick's Old Folk's type antenna, out of
> coax and wire. Given my construction skills, it will be mickey mouse, but
> (hopefully) electrically sound, and give me an idea of what these antennas
> sound like.
>
> Jupiter should be here tomorrow. I'm curious to see how it reacts to the
> indoor antenna 4 meters from the operating position. I've ordered another 
> rf
> choke for the receiver to match the one at the antenna, and if necessary
> will take additional steps.
>
> Then, I'll think about the antenna. I've already started to look for a 
> frame
> for the loop - I'm thinking 3/4" pvc; and flexible copper tubing for the
> main loop.
>
> Lee (NY6P)
>
>
>>
>> -----------------  JHR ----------------------
>>
>>
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