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RV Camper Vertical Dipole

p1879

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prcguy: I encountered your comment, in the old thread you referenced, that answered my question about the length of the end-fed Par element for 11m. Thank you.

I have this same antenna, untested so far, that I think was cut to around 17'6''. You assured me I may be "close enough".

Thanks, p1879
 

slowmover

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prcguy: Do you recall how long your radiator (wire) was on the 11m version of the Par-EF ?

Thank you,
p1879

The EF-11 (11M version) first linked in Post #16 is:

End Fed Half Wave Antenna,
26.8-27.5 MHz,
100W SSB/CW,
50W AM/DIG,
17 ft. 6 in


.
 
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prcguy

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Here is a twist on the subject. Years ago I made a 64:1 EFHW transformer for the upper HF bands using two FT-240-52 cores and mounted it to some fiberglass U channel for a future project. While digging around the garage yesterday looking for things to toss out I came across a 15ft whip antenna for a PRC-47 transceiver and got to thinking.....

Here is the result, a portable CB/10m vertical half wave antenna that's 2ft long when disassembled. The 2:1 VSWR points are around 26.9 and 28.5MHz and its working great connected to my AT-5555NII. I have an adjustable compression cap at the feedpoint where I can optimize the VSWR and I think this antenna will handle about 500w ok. This should make a good travel CB/10m antenna if you have a portable mast to stick it on.

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slowmover

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I’m grateful for your willingness to experiment. “The cheerleader in the kitchen”, right kind of effect (one’s wife; to reference another thread).

As I don’t know what will transpire between here and the end . . I don’t have to have a set formula is dawning realization.

This RV Park project will move along slowly (months to get 4-5?) as it comes down to the other persons interest (or that of a couple). What antenna works well at one location may need to be something else at another. Camper-mounted, tree-hung, free-standing, etc.

I much appreciate the addition.

What can be stowed away for travel seems first requirement (met above), performs well (thanks for graph), and parts re-purposed will appeal to some at this locale.

Thanks. It’s a nice Christmas gift towards the end of a small & unrelated group of people being able to talk at a distance without intermediary.


As a side note, the first vehicle outfitted (re-fitted with same gear) consisted of same 2’ antenna + mount relocated to roof with “good coax”, and trusty ol’ truck driver special 40-channel given clean power & new interior mount.

Wouldn’t get a mile previously. I left the park today and from a GPS-corrected air mile distant high ridge (relative; river valley) at 4.1-miles we could converse. Barely. On a quiet channel. Mid-day, no Skip. (Did quite well up to 2.0-miles).

I don’t think that coincidence.
Was buried under Skip yesterday.

So “we” did it. “We” may be the hardest bridge to cross in this:

Found my big truck GPS a couple of days ago. Correlated distances against phone to landmarks everyone already knows (One road in/out).

This neighbor passed me as we were both heading home two days ago and this re-lit his spark (truck driver also, but sidelined by injury; “spare cash” non-existent) as I pulled over to check his 1-mile and 2-mile.

Today I knocked on his door and offered the test. He didn’t look good. Needless to say both he and I are glad he took it on himself to participate.

Now there’s a man besides myself can talk effectively in immediate environs (where the extant rig of his was “made good” in bonding hood & cleaning vehicle grounds) as there’s a second test station for whomever is the third person to hear us both.

Now I know why I’ve mentally insisted to myself that my Lincoln 2 have it’s’ associated Liberty wireless mic in my pickup. All I could foresee was truckstop parking lot. Seeing is believing versus having to walk, bike or drive around this place when a phone isn’t convenient or no one answers — brush-clearing as it continues, someone fishing the river, a quick recommendation of a supplier for X — if but one vehicle nearby has a radio and several homes are also on the air.

“Group Chat” is a turn-off for some.
Can hear whats in their voice is another thing.

From the RR end — the kindness of strangers — the value of a shared interest forum made visible, real, where the How To man-by-separate-man was just a starting point.

We

.
 
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prcguy

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I’m grateful for your willingness to experiment. “The cheerleader in the kitchen”, right kind of effect (one’s wife; to reference another thread).

As I don’t know what will transpire between here and the end . . I don’t have to have a set formula is dawning realization.

This RV Park project will move along slowly (months) as it comes down to the other persons interest (or that of a couple). What antenna works well at one location may need to be something else at another. Camper-mounted, tree-hung, free-standing, etc.

I much appreciate the addition.

What can be stowed away for travel seems first requirement (met above), performs well (thanks for graph), and parts re-purposed will appeal to some at this locale.

Thanks. It’s a nice Christmas gift towards the end of a small & unrelated group of people being able to talk at a distance without intermediary.


As a side note, the first vehicle outfitted (re-fitted with same gear) consisted of same 2’ antenna + mount relocated to roof with “good coax”, and trusty ol’ truck driver special 40-channel given clean power and new interior mount.

Wouldn’t get a mile previously. I left the park today and from a GPS-corrected air mile distant high ridge (relative; river valley) at 4.1-miles we could converse. Barely. On a quiet channel. Mid-day, no Skip. (Did quite well up to 2.0-miles).

I don’t think that coincidence.
Was buried under Skip yesterday.

So “we” did it. “We” may be the hardest bridge to cross.

Now there’s a participant besides myself can talk effectively in immediate environs (where the extant rig has been “made good” in bonding hood & cleaning vehicle grounds) as there’s a second test station.

From the RR end — the kindness of strangers — the value of a shared interest forum made visible, real, where the How To man-by-separate-man was just a starting point.

We

.
The same transformer can be used as a vertical tree hanger replacing the whip with about 18ft of wire. Or as a bi-directional horizontal wire, good for DX while reducing local chatter.
 
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