[MRCA] Antenna(s)

Sun Jun 16 13:15:54 EDT 2019

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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