[MRCA] Antenna(s)

Sun Jun 16 13:22:42 EDT 2019

Well you could go well out into the field, away from the local community, and 
the RFI it creates.

I did that at one point and at first thought my receiver became deaf until I 
realized it's not everywhere that noise is S9 to 20 over across all ham bands.

Peter
kb2vtl

On 6/16/2019 1:15 PM, Ray Fantini wrote:
>
> Resonant antennas work best, noise is just a fact of life in the modern world. 
> not just TV sets but wall warts and everything else. In my QTH found that the 
> washing machine generates noise that sounds like digital in the 60 meter band 
> and that cheap Chinese eight foot florescent fixtures generated wide band 
> noise that wen up to around 120 MHz.
>
> Some you can get rid of like the lighting fixtures but others are not as easy.
>
>  I try to keep all the Ham stuff at one end of the house and the antennas as 
> far from everything as possible. Have the advantage of living in the woodland 
> swamps of Delmarva outside of town with no neighbors so that helps but find 
> that best operation can be from using a good antenna and the M151 with radios 
> aboard.
>
>
> Field day is coming up, wonder if anyone will be doing an all military radio 
> operation? I do a lot of field operations every year but somehow have not done 
> the Ham Field Day event in years, maybe decades. Have lots of resources 
> available just dont have the desire to hang out with the local community.
>
>
> Ray F/KA3EKH
>
>
> --------------------------------------------------------------------------------
> *From:* mrca-bounces at mailman.qth.net <mrca-bounces at mailman.qth.net> on behalf 
> of J Mcvey via MRCA <mrca at mailman.qth.net>
> *Sent:* Sunday, June 16, 2019 11:10 AM
> *To:* Steven Gajkowski; Peter Gottlieb
> *Cc:* mrca at mailman.qth.net
> *Subject:* Re: [MRCA] Antenna(s)
> I think any RESONANT antenna will be more noisy. All of those so called 
> "multi-band " have less noise because they are less effective at the operating 
> frequency.
> If you live in a very populated area, it may be difficult to impossible to get 
> rid of all the noise. One of the big offenders is the cheap TV power supplies. 
> Plasmas were the worst radiators, but fortunately they are mostly out of 
> production now.
> My vhf rig would break squelch with electronic noise as I passed certain 
> establishments like gas stations and bars.
>
> That being said, Have you checked for noise sources within your own home?  
> Simple devices like automatic night lights and dimmers can cause big noise issues.
>
>
>
> On Sunday, June 16, 2019, 10:51:39 AM EDT, Peter Gottlieb <kb2vtl at gmail.com> 
> wrote:
>
>
> I put up a loop and all it picked up was noise from the neighborhood. I think 
> it is different under different circumstances. Maybe it would work in his 
> situation.
>
>
> Peter
>
> On Jun 16, 2019, at 10:26 AM, Steven Gajkowski <kd3ht at epix.net 
> <mailto:kd3ht at epix.net>> wrote:
>
> Do you have a tree in each corner, 3 corners, put up a loop. May help with 
> some of the noise you get too!
>
> Steve
>
> *From:*mrca-bounces at mailman.qth.net <mailto:mrca-bounces at mailman.qth.net> 
> [mailto:mrca-bounces at mailman.qth.net] *On Behalf Of *W2HX
> *Sent:* Saturday, June 15, 2019 11:25 AM
> *To:* mrca at mailman.qth.net <mailto:mrca at mailman.qth.net>
> *Subject:* [MRCA] Antenna(s)
>
> Hi friends,
>
> Its been about 10 years since I had a proper horizontal antenna at the QTH 
> since my old OCF dipole went deaf and then broke. In response I put up a 
> vertical which I think has some real DX potential once I can figure out the 
> source of some serious QRM.
>
> Today I had some tree guys trimming a bunch of things for us and while they 
> were here, I had them put a pulley and some Mastrant-M 860 lbs. paracord up in 
> a tree about 80 feet.
>
> Unfortunately the arrangement of trees on the property is really not conducive 
> to wire antennas. I have two trees that go from one corner of the property to 
> the other corner diagonally, about 195 feet apart.  I had an OCF dipole 
> between them and it ran above the house. This worked out pretty well because 
> the feedline dropped right down over the house near the chimney.
>
> I was thinking of running the same configuration, but this time with a 
> messenger line between the trees to keep all of the force off the radiating 
> elements themselves. In this case, one side would be up 80 feet (pulley 
> mentioned above) and the other about 35'.  This arrangement is still in the 
> running.
>
> Others have suggested that I put the center point of an antenna in this 80' 
> tree. I am more seriously considering this arrangement since I think getting 
> the center point as high as possible is beneficial but the antenna elements 
> would not 180 degrees but maybe 90 degrees. I have had some suggestions that 
> this might not be so bad and that it might be best to have the two ends slope 
> down. I will have to see about that.
>
> Well anyway with a good pulley 80 feet up at least I will have some options. 
> More planning to come!
>
> 73 Eugene W2HX
>
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