Re: [Elecraft] PAR/LNR EFHW antenna

Ahhh yes, the End-fed Zepp.  Trailing wire out the back of the gasbag, open wire line to the TX with one end open at the antenna.  Every time someone mentions it, I have Hindenburg dreams. Yes, it does need a small something for a counterpoise, given the small current in the high impedance

Re: [Elecraft] PAR/LNR EFHW antenna

Thanks Al!  Looks like most violate Jim's guidance.  Probably explains why it doesn't work on 6 and may not work or work well on 10 and 12 if I live to 2021 when we should see spots. 73, Fred ["Skip"] K6DGW Sparks NV DM09dn Washoe County On 1/9/2018 1:50 PM, VE3GAM wrote: here's a video

Re: [Elecraft] PAR/LNR EFHW antenna

Of K9MA Sent: Tuesday, January 9, 2018 5:48 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] PAR/LNR EFHW antenna On 1/9/2018 19:25, Bill Johnson wrote: > With a 1/2 wave a counterpoise is not used. It needs SOME counterpoise, but not much, because the current in it is very small. If noth

Re: [Elecraft] PAR/LNR EFHW antenna

On 1/9/2018 19:25, Bill Johnson wrote: With a 1/2 wave a counterpoise is not used. It needs SOME counterpoise, but not much, because the current in it is very small.  If nothing else is available, the coax shield will suffice, and causes no harm.  The small current at the end of the antenna

Re: [Elecraft] PAR/LNR EFHW antenna

: [Elecraft] PAR/LNR EFHW antenna Going way back to the original post, it seems to me that there is a simple answer: The OP wants something that is very portable, that the KX2 will tune. The whole balun discussion comes from trying to match a near-infinite impedance, and chopping the wire down

Re: [Elecraft] PAR/LNR EFHW antenna

: [Elecraft] PAR/LNR EFHW antenna I use an end-fed wire [1/2 wave on 80] from MyAntennas.com run along the top of a wood fence about 1.8 meters high.  It has a transformer in a sealed box.  The outer surface of the coax seems to serve as the counterpoise.  It enters the house through a steel pipe near

Re: [Elecraft] PAR/LNR EFHW antenna

The end fed dipole is a good solution for a portable antenna - it is relatively easy to get one wire up in the air - tie a line to a half filled (or more) water bottle and throw it over whatever support is available, tie the line to the antenna end and pull it up. For the home station where

Re: [Elecraft] PAR/LNR EFHW antenna

What part of life isn't a trade-off? Another answer might be "don't feed it at the end." I'd be thinking about a quarter-wave of ladder line if I was aiming at one band -- always liked J antennas. A dipole is a lot closer to 50 ohms. Lots of answers. All compromises. 73 -- Lynn On

Re: [Elecraft] PAR/LNR EFHW antenna

On 1/9/2018 15:48, Lynn W. Taylor, WB6UUT wrote: The whole balun discussion comes from trying to match a near-infinite impedance, and chopping the wire down a bit (or making it longer) is going to bring it to an impedance that the tuner can match. That's a trade-off:  You can match it without

Re: [Elecraft] PAR/LNR EFHW antenna

KX2 so not much power. 53 feet of Wireman #534 should tune and radiate on most bands with a KX2, and fit in a sandwich sized baggie. Another chunk for a counterpoise. Simple. Maybe not perfect, but simple. 73 -- Lynn On 1/9/2018 1:57 PM, Bob McGraw K4TAX wrote: I use a switch tapped air

Re: [Elecraft] PAR/LNR EFHW antenna

I use a switch tapped air inductor with a variable C on one end. It is an L network thus it is reversible and will match either Hi Z or Lo Z loads. This always brings the load to within range the ATU in the radio can resolve a match. Bob, K4TAX Sent from my iPhone > On Jan 9, 2018, at 3:48

Re: [Elecraft] PAR/LNR EFHW antenna

4:28 PM To: <elecraft@mailman.qth.net> Subject: Re: [Elecraft] PAR/LNR EFHW antenna Inquiring minds want to know... :-) Dennis NJ6G On 1/9/2018 13:25, Fred Jensen wrote: I'd have to destroy it to see what's inside the box. _

Re: [Elecraft] PAR/LNR EFHW antenna

Going way back to the original post, it seems to me that there is a simple answer: The OP wants something that is very portable, that the KX2 will tune. The whole balun discussion comes from trying to match a near-infinite impedance, and chopping the wire down a bit (or making it longer) is

Re: [Elecraft] PAR/LNR EFHW antenna

He does sell just the box. On 1/9/2018 1:28 PM, Dennis Moore wrote: Inquiring minds want to know...  :-) Dennis NJ6G On 1/9/2018 13:25, Fred Jensen wrote: I'd have to destroy it to see what's inside the box. __ Elecraft mailing

Re: [Elecraft] PAR/LNR EFHW antenna

Inquiring minds want to know...  :-) Dennis NJ6G On 1/9/2018 13:25, Fred Jensen wrote: I'd have to destroy it to see what's inside the box. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help:

Re: [Elecraft] PAR/LNR EFHW antenna

I use an end-fed wire [1/2 wave on 80] from MyAntennas.com run along the top of a wood fence about 1.8 meters high.  It has a transformer in a sealed box.  The outer surface of the coax seems to serve as the counterpoise.  It enters the house through a steel pipe near the ground into a closet

Re: [Elecraft] PAR/LNR EFHW antenna

On 1/9/2018 10:45, Bob McGraw K4TAX wrote: Darn autocorrect "balun"..not baling! Many, many years ago, I wrote a report on a balun I designed. The typist (remember those?) changed every "balun" to "balloon", and no doubt told all her friends how bad engineers are at spelling. 73,

Re: [Elecraft] PAR/LNR EFHW antenna

Darn autocorrect "balun"..not baling! Bob, K4TAX Sent from my iPhone > On Jan 9, 2018, at 10:41 AM, Bob McGraw K4TAX wrote: > > Not only winding them wrong but if find more and more being used incorrectly. > There is no one baling design that can be used in all

Re: [Elecraft] PAR/LNR EFHW antenna

Not only winding them wrong but if find more and more being used incorrectly. There is no one baling design that can be used in all applications. The more common error is the internal balun contained in tuners. Bob, K4TAX Sent from my iPhone > On Jan 9, 2018, at 3:33 AM, Jim Brown

Re: [Elecraft] PAR/LNR EFHW antenna

On 1/8/2018 8:19 PM, K9MA wrote: I would be cautious about using a transformer above 40 meters, as the stray capacitance may be too large.  I haven't tried it, though, so it might work with some transformers. For years, we've been winding our transformers wrong. The windings should be on

Re: [Elecraft] PAR/LNR EFHW antenna

on.us> Sent: Monday, January 08, 2018 8:39 PM To: <elecraft@mailman.qth.net> Subject: Re: [Elecraft] PAR/LNR EFHW antenna On 1/8/2018 16:59, Rich Arland wrote: Failing that path, has anyone hooked an EFHW to the internal ATU with good results? I would also include a cut to frequency gro

Re: [Elecraft] PAR/LNR EFHW antenna

ve3gam -- From: "K9MA" <k...@sdellington.us> Sent: Monday, January 08, 2018 8:39 PM To: <elecraft@mailman.qth.net> Subject: Re: [Elecraft] PAR/LNR EFHW antenna On 1/8/2018 16:59, Rich Arland wrote: Failing that path, has anyone hooked an EFHW to the intern

Re: [Elecraft] PAR/LNR EFHW antenna

of littering in the state park where I like to hang out. 73, Bill K9YEQ -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of K9MA Sent: Monday, January 8, 2018 7:39 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] PAR/LNR

Re: [Elecraft] PAR/LNR EFHW antenna

Steve, AA5TB, has a great piece on his site appropriately called How to Make an End Fed Half Wave Antenna Work. I have the EARCHI and I've built from Steve's guidance. I use them when trailer camping. Very happy with both. Eric KE6US On 1/8/2018 2:59 PM, Rich Arland wrote: I have one of the

Re: [Elecraft] PAR/LNR EFHW antenna

On 1/8/2018 16:59, Rich Arland wrote: Failing that path, has anyone hooked an EFHW to the internal ATU with good results? I would also include a cut to frequency ground radial that I would lay out below the antenna. That would be the easiest thing and simple to employ. That definitely will

Re: [Elecraft] PAR/LNR EFHW antenna

Dennis, Mel and Rich: Thanks for the quick replies. I have googled the EFHW and have some baseline info to play with. My original idea was to use the internal ATU of the KX2 coupled directly to antenna and put a counterpoise on the ground side of the a rig's antenna connector. I have the

Re: [Elecraft] PAR/LNR EFHW antenna

This article opens up the match box and figures out the contents. http://www.hamradio.me/antennas/lnr-precision-ef-102040mkii-examination.html wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Jan 8, 2018, at 3:07 PM, rich hurd WC3T wrote: > >

Re: [Elecraft] PAR/LNR EFHW antenna

Consider what W8JI says about end fed ants. He also addresses the PAR. Interesting observation from one set of calcs he did- Maximum antenna current is .758 amperes, while the coax common mode current maximum is actually 1.02 amperes!

Re: [Elecraft] PAR/LNR EFHW antenna

I've had success with this unun on my K2/10 and a FT-897 at 100 watts/external tuner. Used a random length of wire tossed up in a tree, haven't tried to make one resonant. http://www.earchi.org/92011endfedfiles/Endfed6_40.pdf 73, Dennis NJ6G On 1/8/2018 14:59, Rich Arland wrote: I am after

Re: [Elecraft] PAR/LNR EFHW antenna

Try a 64:1 balun. That's what our antenna expert at our club suggests for resonant end fed antennas. On Mon, Jan 8, 2018 at 5:59 PM, Rich Arland wrote: > I have one of the original PAR end fed half wave antennas prior to LNR > taking over production and sales. > > > Everything

[Elecraft] PAR/LNR EFHW antenna

I have one of the original PAR end fed half wave antennas prior to LNR taking over production and sales. Everything is present EXCEPT the little matching network that couples the EFHW to the radio. I tried contacting LNR to obtain a new one but they told me that they couldn't do that, BUT