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eHam Forums => DXing => Topic started by: KY6R on March 25, 2013, 04:53:58 AM



Title: Any New Antennas Planned for DX-ing?
Post by: KY6R on March 25, 2013, 04:53:58 AM
While waiting for the next ATNO - its antenna time again. Luckily, I can work on antennas year round here.

I've got two projects on the drawing board:

I've designed a combination Moxon - Yagi on a 3" boom. Best bands will be 20 - 17 - 15, with "decent enough" gain on 12 and 10M. All insulated elements, and my brother - who owns a very high end CNC machine shop will help with some of the hardware.

I'm adding a second 160M vertical - 20' away from the first one. These are short, top loaded (coil and top hat) verticals, and adding the second one improves my transmit efficiency from 50% to about 85%. They share the same 64 buried radial system. The idea comes from the ARRL 160M Antenna book - a pretty cool little book indeed.


Title: RE: Any New Antennas Planned for DX-ing?
Post by: KF7CSO on March 25, 2013, 05:28:39 AM
Before the year is up, a crank-up tower, a Tennadyne T-8 LPDA, and maybe a rotatable 40 meter dipole above that.

I also plan on continuing to play with Moxons on my portable mast set-up. Oh, and a beverage or two.


Title: RE: Any New Antennas Planned for DX-ing?
Post by: K4JK on March 25, 2013, 05:29:21 AM
I'm moving to a new QTH next month with 11 acres of land and lots of trees. Right now I'm thinking I'll build an easily re-oriented Cebik-style lazy H to start out and then figure out the best way to get up something like a Hexbeam. I'm really interested in wire gain antennas right now and I should have plenty of room to play around with.

I also want to get into 80 and 160 meter DXing so I'll probably add something for those bands during next fall.

I'm also really tempted to purchase a KPA500.


Title: RE: Any New Antennas Planned for DX-ing?
Post by: N2RJ on March 25, 2013, 07:06:57 AM
Looking to repair the MonstIR this spring or summer.

Possibly add another antenna on the tower for 2nd radio use.

Need to re-string my Beverages. Fallen trees have taken their toll.

Maybe my 4 square will go up this year?


Title: RE: Any New Antennas Planned for DX-ing?
Post by: AD9DX on March 25, 2013, 07:28:10 AM
Looking to repair the MonstIR this spring or summer.

Possibly add another antenna on the tower for 2nd radio use.

Need to re-string my Beverages. Fallen trees have taken their toll.

Maybe my 4 square will go up this year?

Dang Ryan! That's an ambitious summer.


Title: RE: Any New Antennas Planned for DX-ing?
Post by: VK3HJ on March 25, 2013, 08:12:33 AM
I've been thinking about a Moxon or similar reduced size 2 el yagi for 40 and 30 m, but that would need it's own tower. Presently I run a large doublet (520') and a 40 m Bobtail Curtain, and I do ok with those for 80, 40 and 30 m.
A brief study of multiband beams suggests that to improve on my 5-band Hex Beam would require something huge - too big for my light crank up lattice mast. I would not want to cut back to just a tri-band beam.
With winter coming up, it is a good time to work on station improvements. The bands just turn to crap from around June to August here. Might be a good time to play on the 630 m band.
73,
Luke VK3HJ


Title: RE: Any New Antennas Planned for DX-ing?
Post by: N2RJ on March 25, 2013, 08:13:11 AM
Looking to repair the MonstIR this spring or summer.

Possibly add another antenna on the tower for 2nd radio use.

Need to re-string my Beverages. Fallen trees have taken their toll.

Maybe my 4 square will go up this year?

Dang Ryan! That's an ambitious summer.


LOL, yes. How much of that gets done will probably be half that... I can see the repair and the 4sq going up.


Title: RE: Any New Antennas Planned for DX-ing?
Post by: N3OX on March 25, 2013, 08:17:03 AM
Pretty sure that time has come in this boy's life to set DXing aside to focus on other things, but we'll see. I'll make sure to put something up for Heard anyway.

Looks like I'm going back into apartment living soon, but it would be fun to try more of my tiny antenna ideas "in the field" with daily use.

I might start to do something different, though, like QRP digital.


Title: RE: Any New Antennas Planned for DX-ing?
Post by: AF3Y on March 25, 2013, 08:40:49 AM
 ;D I may put a little wax on my S-9 vertical. ;D (Protection against Fla. sunshine)

(and save all that money :D)

73, Gene AF3Y


Title: RE: Any New Antennas Planned for DX-ing?
Post by: N3QE on March 25, 2013, 10:59:04 AM
Figuring on a triangle or square of short 160M receive antennas and phasing in the shack.


Title: RE: Any New Antennas Planned for DX-ing?
Post by: W1NK on March 25, 2013, 12:33:56 PM
After restringing and retuning my fallen 2 ele 15M inverted-V "beam" (inspired by KY6R and his K1WA arrays) and seeing (ok, hearing) some really nice F/B, I'm tempted to string one up for Heard.  Although now Rich mentions his Moxon and gets my mind working again  :)

Maybe a 160M Inverted L if I can get the tree guy back to clean up the tree that took out the inverted V array.  Who know, if I get real ambitious, perhaps I'll figure out a way to get a tribander in the trees :D

Frank, W1NK


Title: RE: Any New Antennas Planned for DX-ing?
Post by: K1ZJH on March 25, 2013, 12:56:41 PM
I have my 160 and 80 meter inverted L antennas strung up and tied off, this summer I need to do the coax connections and final trimming for best SWR; and most importantly, some sort of modest radial field.

The Reyco 30 meter traps are back in production, so I will able get my 40 and 30 meter dipole back up in the air as well.

Pete


Title: RE: Any New Antennas Planned for DX-ing?
Post by: AF5CC on March 25, 2013, 07:39:55 PM
I have a Cushcraft MA5B sitting in the shed.  Now to just get a bigger rotor and get it up!

John AF5CC


Title: RE: Any New Antennas Planned for DX-ing?
Post by: KF7CSO on March 25, 2013, 07:53:11 PM
;D I may put a little wax on my S-9 vertical. ;D (Protection against Fla. sunshine)

(and save all that money :D)

73, Gene AF3Y

Makes me want to live by a stinky ol' brackish swamp instead of a rock hard dry desert.  ;)


Title: RE: Any New Antennas Planned for DX-ing?
Post by: WD4ELG on March 25, 2013, 08:20:26 PM
I was looking at one of those Sturba curtain wire antennas with 15dBi gain on 10 meters, but no way to rotate it and with the sunspots not looking too promising...

I might try to do some sort of wire beam inverted L yagi for 40 meters, pointed towards Heard Island in the hope that this gives me a leg up and increases my probability.  Hex beam might not make it for 20-10.  Try to get that together and up before September.

Was also considering some sort of moxon for 15 meters by Memorial Day.  But probably same perf as the hex., unless it's a three element.


Title: RE: Any New Antennas Planned for DX-ing?
Post by: NI0C on March 26, 2013, 08:37:19 AM
Like Tim, N3QE, I have plans to improve my Rx capability on the low bands.  Because of the constraints of my suburban backyard lot, whatever I do will have to be very small.

73,
Chuck. NI0C


Title: RE: Any New Antennas Planned for DX-ing?
Post by: KH6DC on March 26, 2013, 05:08:03 PM
Add more ground radials.  Right now I have 9 and short term plan is to get at least 12.  Looking to get 32 by summer.  Maybe a hex on a portable tripod for the Wake ISland dxpedition.


Title: RE: Any New Antennas Planned for DX-ing?
Post by: K1ZJH on March 26, 2013, 06:31:03 PM
Like Tim, N3QE, I have plans to improve my Rx capability on the low bands.  Because of the constraints of my suburban backyard lot, whatever I do will have to be very small.

73,
Chuck. NI0C

What are you planning?  I have my inverted L antennas almost finished, but RX is another can of worms.

Pete


Title: RE: Any New Antennas Planned for DX-ing?
Post by: K6EK on March 27, 2013, 05:48:27 AM
'Tis the season alrighty.. I'll be raising the mast on a new Hex Beam to 35 feet, adding more radials to the Butternut vertical (now at 18, going for 32) and I really need to get my 40 meter dipole back up -

Ken - K6EK


Title: RE: Any New Antennas Planned for DX-ing?
Post by: W2IRT on March 27, 2013, 07:23:03 AM
On my quarter-acre lot there's not much more I can do other than go significantly higher, which I can't really afford. No space for Beverages, my K9AY is in one corner, an inverted-L for 160 over top of the driveway, tower in the middle. About all I could do would be a vertical in the furthest corner of the yard, but I can't see to what end. I already hear as well as possible on 80 given local noise levels, and can work everything I hear, plus I'm an alligator on 160--and I don't see a way of improving my 160 RX, but I'm sure open to ideas on that front. I've got a reliable range of about 4000 miles on 160. Anything beyond that and it's a crapshoot and relies solely on the quality of the build on the DX side (missed Peter1, 7O6T and a host of other big-name operations beyond that limit).


Title: RE: Any New Antennas Planned for DX-ing?
Post by: N3QE on March 28, 2013, 06:55:28 AM
Like Tim, N3QE, I have plans to improve my Rx capability on the low bands.  Because of the constraints of my suburban backyard lot, whatever I do will have to be very small.


What are you planning?  I have my inverted L antennas almost finished, but RX is another can of worms.

I have a single K9AY loop already, switchable between NE and SW, and it has been wonderful. I would like to add another one for NW and SE by this fall.

I will be seeing if I can sneak a beverage-on-ground along a NE/SW treeline that runs between properties in my neighborhood, or maybe even going to small triangular Hi-Z type array. Recommended spacing for the Hi-Z triangle array is 50 feet and I can manage that in my yard.


Title: RE: Any New Antennas Planned for DX-ing?
Post by: WD4ELG on March 28, 2013, 10:33:53 AM
The Hi-Z arrays work quite well, I am thrilled with the performance of mine.  It was not cheap, but the quality and performance are there.  Some juicy stuff from this past season with mine:

1. XU long-path on 80 SSB, and I could not even hear him on my inverted L (and not many other folks could hear him either).
2. V5, ZL and ZS on 160 that I could not hear consistently on my inverted L.  Also heard but could not break the pileups on 160 for 9K2, A6, A4.  And I finally climbed over 100 worked on 160.


Title: RE: Any New Antennas Planned for DX-ing?
Post by: N4OGW on March 28, 2013, 10:45:36 AM
On my quarter-acre lot there's not much more I can do other than go significantly higher, which I can't really afford. No space for Beverages, my K9AY is in one corner, an inverted-L for 160 over top of the driveway, tower in the middle. About all I could do would be a vertical in the furthest corner of the yard, but I can't see to what end. I already hear as well as possible on 80 given local noise levels, and can work everything I hear, plus I'm an alligator on 160--and I don't see a way of improving my 160 RX, but I'm sure open to ideas on that front. I've got a reliable range of about 4000 miles on 160. Anything beyond that and it's a crapshoot and relies solely on the quality of the build on the DX side (missed Peter1, 7O6T and a host of other big-name operations beyond that limit).

Probably your inverted L is re-radiating a lot of noise into your K9AY. One potential improvement for low-band rx would be to try detuning the inverted L while receiving.

Tor
N4OGW