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

[Rick - DJ0IP / NJ0IP]

So don't use a loop that requires a pre-amp.
I've used mag loops on and off for 30 years and have never used a pre-amp
with them.

73 - Rick, DJ0IP
(Nr. Frankfurt am Main)


-----Original Message-----
From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of
Rockinghorse Winner (Terry)
Sent: Monday, April 28, 2014 5:09 AM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] New Jupiter on its Way _ A Few Questions

Bob McGraw - K4TAX wrote:
> 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

The primary reason for the receiving loop is to cut down on the qrn. I get
out 'ok' with the shortened dipole I have on a tripod in my living room.
Looks kind of weird in that location but....
>
>
>
>
> ----- 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 ----------------------
>>>
>>>
>>> _______________________________________________
>>> TenTec mailing list
>>> TenTec at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/tentec
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>>
>
>
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