Author Topic: My Main HF Antenna Came Down  (Read 162 times)

Offline JohnyMac

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My Main HF Antenna Came Down
« on: November 30, 2024, 10:55:17 AM »
Let's see...

I put up my main home brew HF antenna in 2017. I posted how I made it HERE if you want to read about it. Well it came down during the big wet snow last weekend. Not bad for being in the air for seven years.

A lot has been going on around the redoubt and the weather just has not been cooperating till this past Wednesday. So it was time to gather my mise en place for getting the antenna back up. I brought into the cabin the antenna launching tool called the PAAL (Pneumatic Atomic Antenna Launcher or PAAL). Here is a link to how to build one that I wrote for Americanpartisan.org a few years ago. Boy O' boy, that tool has seen a lot of use since it's build in 2018. This time of year I warm up the PAAL to room temperature so the release valve works flawlessly.

Wednesday, the temperature was in the mid 30's with a slight breeze out of the southwest consequently I had to use Kentucky windage to compensate for the breeze. In short, I had no issues getting the mortar shell over the tree I was aiming at. The issue was reeling in the monofilament fishing line with the paracord attached. At the apex of the tree, the fishing line kept snapping. Well the line had been used over the past 5-6 years a shiton times and had probably weakened over time. Off to the hardware store about 40-minutes away (Nothing is close by the cabin  :facepalm:) to buy a $3.50 spool of 25-LB line.

By the time I got home it was dark and I said to myself, "this is God's way of telling me, give it up for the day".

The next day was turkey day and it was snowing so rehanging the antenna was out of the question. Plus I had to make 3 pies to take to a friends house for the Thanksgiving feast.

At the feast the host, an amateur radio enthusiast too, suggested I needed help. "Many hands make short work of a project" he said. He sent out a call on our MAG SIGNAL site looking for volunteers for the next day. I set the time and two showed up to help yesterday.

We put the new fishing line on old reel. Then pumped up the PAAL to 100 psi and we were ready to shoot our first mortar shell.

In short, from the time we shot our mortar shell till the time we were done hanging the antenna, we were done in about 1-hour. Of course I used the Counter Weight Block Method.

What I learned,

> Replace the monofilament line every 2 -years or so on your PAAL.
> You can get a good life out of a good counter weight block hang of your antenna between trees. In my case
   about 7-years. Maybe even more if the thigh sized tree limb that snapped off with the heavy wet snow, didn't
   take the antenna down.
> Have a second antenna in the air as backup. I did have one up but it came down about 8-months ago when we
   cut one of the antennas tree supports down as it was a beetle killed Ash tree. I am going to build a Delta loop
   by year end. More on that when I do build it.
> Most important...It is good to have friends as "Many hands make short work of a project"  :thumbsUp:  :cheers:

73

« Last Edit: November 30, 2024, 11:15:40 AM by JohnyMac »
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Offline Sir John Honeybucket

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Re: My Main HF Antenna Came Down
« Reply #1 on: November 30, 2024, 06:19:16 PM »
Yes, dead antennas seem to be epidemic, lately.

My 'main' OCF dipole drops dead periodically.  This time I put up 550 cord as the halyard with a marine pully at the top.  Unfortunately, some $%^&#! rodent chewed the end of the coax while it was at ground level, hooked to my vertical antenna, waiting to be switched back to the dipole.  Repairing it, I soon realized that this coax was in such poor condition and of such poor build quality ( hello China) that after having it come apart in my hands after repair, I ordered its replacement, a look alive LMR400, which is scheduled to arrive tomorrow.  The 550 cord halyard with a marine grade pully at the top makes antenna lift and drop MUCH faster and easier, rather than dragging the line over the tree limb repeatedly. 

Pro Tip" Do NOT let creeping vines climb up your antenna lines, else misery is soon to follow.


de Sir John----- LATER -----

My coax arrived today.  The old, rotted coax has been removed and other than connectors, will likely go into the trash.  It's so nice to have the HF set hooked to a good antenna again.  'See' you on the radio.   -SJH
« Last Edit: December 01, 2024, 03:11:38 PM by Sir John Honeybucket »
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Offline Defiant_Faith

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Re: My Main HF Antenna Came Down
« Reply #2 on: December 01, 2024, 05:16:10 AM »
Thanks for the link with instructions for building PAAL II. I sent the link to my husband, I think he may enjoy building one.

Offline JohnyMac

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Re: My Main HF Antenna Came Down
« Reply #3 on: December 01, 2024, 02:16:13 PM »
@ Sir John...Yeah on the coax. Of late I only buy USA coax and jumpers. Good luck Brother.

@ D_F...Let your husband know to stay away from the monofilament fishing line and go with braided fishing line. I learned today at the weekly ham radio breakfast that braided will out last monofilament. If he does build it, he will be the most popular radio guy in the club.  :cheers:
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Offline Defiant_Faith

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Re: My Main HF Antenna Came Down
« Reply #4 on: Today at 08:28:30 AM »
Perfect, my husband already has some braided fishing line. Thanks for the extra tip!

Offline Sir John Honeybucket

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Re: My Main HF Antenna Came Down
« Reply #5 on: Today at 10:46:58 AM »
With my refurbished OCF dipole back up at 65 feet (estimate) last night's net was excellent. JM was S9+ on the digital net and S9 ish on SSB on 80m.  I still have ability to hoist this antenna even higher, but so far, on 40 meters CW, a couple of hours after sunset I was heard by the RBN in handsent CW, at 100 Watts across the entire continental United States, across the Atlantic to Norway, down to Romania and parts in between.

Please keep us posted on your antenna progress.


- Sir John Honeybucket
« Last Edit: Today at 11:04:58 AM by Sir John Honeybucket »
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