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331
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eHam Forums / Antennas and Towers and more / RE: 80 & 160 meter antenna
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on: August 18, 2011, 05:16:27 AM
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Dont be afraid to drop the ends of your antennas or bend them. ie the 80m dipole as high as possible and then drop the ends to get to resonance.
Inverted Ls are another great way to get on 160 or 80. Put up the vertical part as high as possible adn then run the remainder out, and drop it down as necessary or bend it. Put in a ground rod and couple of radials as long as possible and you will work ok.
Ive worked a fair bit of DX with a 15 ft high 160m inv L. The far end is 6 ft off the ground. I use a ground rod and 2 qtr wave radials.
More short radials is better than a few qtr wave ones.
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332
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eHam Forums / Antennas and Towers and more / RE: Horizontal Loop Antennas
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on: August 18, 2011, 05:11:08 AM
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Horizontal loops are fun, and do a great job for rag chewing NVIS contacts within 1000-1500 miles . Getting them up as high as possible makes a significant difference but they work pretty well at 15-25 ft if thats the best you can do.
The classic 80 or 160 m loop up at 45 ft or so is a terrific radiator on all bands that are multiples of the fundamental freq. ie 160-80-40-20-15-10. SWR is in the 2:1 range on most of those bands so a tuner helps the rig.
The weight of the wire is a factor but being wire, if it falls down its usually not a big deal to shoot another string or rope up and rehang it.
Larger loops with lighter insulated wire go up easier but go much below 14 gage and you may have breakage/stretching/ issues. But again, no big deal in fixing it.
The 40-45 ft ht is especially nice for multiples of the fundamental freq. since you get a lot better lower angle radiation and work more DX on those bands. So the higher you go the better DX radiator it is, with many small lobes some with gain.
Ive fed it with OWL, ladder line and coax. All worked fine. No problem with 9:1 balun to coax for entering the shack from outside. Coax all the way is ok but your losses will climb on higher hf frequencies ut are no big deeal on 160-80-40 for most lengths. Multiples of 100 ft runs makes owl/LL more appealing.
No real sweat with number of sides. Jut fit it to your lot and the best trees, and GO! Ditto horizontal, or sloping. Use the highest trees.
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334
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eHam Forums / VHF / UHF / 6M mobile ants and rigs
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on: August 17, 2011, 03:45:19 PM
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What are recommended 6m mobile antennas?
Any dual band 6 n 2?
How about triband 6, 2 n 440?
And finally, what are good reasonably priced 6m rigs.....ie hf + 6m.
It's getting tougher and otugher to find space for my hf rig in the new cars/suvs. Ive got a 2011 Toyota Highlander. and Im still looking for a place to mount one! Maybe even go with an hf+6+2 rig?
thoughts?
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335
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eHam Forums / VHF / UHF / RE: Any active 6M repeaters out there?
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on: August 17, 2011, 02:25:47 PM
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Sorry to hear about the inactivity Dick. That's one heckuva 6M repeater you have there in SC, Im tempted to drive down just to use it.
Im surprised none of the local clubs have set up a club weekly net on it. Or that the ARES boys dont use it for wider range comm purposes.
I think the time is coming....or has already arrived ... for much heavier usage of 6m.
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336
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eHam Forums / Special Event Stations / RE: John Clem Special Event Station - Newark, OH - Sat Aug. 13 - 9am-4pm 40m ssb
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on: August 17, 2011, 02:20:40 PM
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Thanks to all who contacted W8TNX and inquired about Johnny Clem. We met a guy who had a grrandfather who was in the Michigan Army about the time JC was there. Another fellow - a 4 - reminded us we were on opposite sides in that particular effort.  And quite a few history buffs impressed me with their knowledge of the Civil War. You can check out the Licking County Historical Society for more info on General Clem....or Sargeant Clem the 14 yr old. Thanks to all. Self- printing certificates will be available in a few days. Just need your QSO number on the website referenced on QRZ.com. Hope you enjoy it. See you next year!
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339
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eHam Forums / Special Event Stations / John Clem Special Event Station - Newark, OH - Sat Aug. 13 - 9am-4pm 40m ssb
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on: August 11, 2011, 05:39:40 AM
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The COOKEN ARC will set up and operate W8TNX at the Licking Historical Society in Newark, OH., on 7240 khz + or -, SSB, to celebrate the amazing accomplishments of native son Johnny (nee Klem) Clem, the Civil War era boy soldier and eventual General in the US Army.
You will be given a contact number. A nice certificate is available. See the QRZ posting for details.
1. PDF self printing certificates confirming your August 13, 2011 40 meter SSB contact with our special event station W8TNX ( Licking County, Grid EN89sb will be available ( on or before September 1, 2011 ) to those operators listed. Remember your QSO number to help find your certificate. Find your call in the alphabetical list and click the contact number link next to it. 2. Cooken will also upload all the QSO's to LOTW for eQSL purposes.
3. Paper QSLs are only available by contacting the QSL manager listed on the QRZ.com page for this callsign. We no longer send routine paper QSL's due to postage costs. Thanks for supporting this special event station and our public relations endeavor.
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341
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eHam Forums / VHF / UHF / RE: VHF/UHF Dual Band Vertical Antenna Height
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on: August 09, 2011, 05:38:31 AM
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Chimney mount: Long term chimney mounts expose mast, clamps and antennas/coax to accelerated corrosion especially but not exclusively from hot flue gasses.
After seeing what can happen over a few years, I now choose less appealing sites away from chimney and other flue vents, for better long term survivability. It may not blow down for a long time but the corrosion induced rf losses can hurt you far sooner.
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343
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eHam Forums / RFI / EMI / RE: I'm opening my neighbor's garage door!
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on: August 08, 2011, 05:14:04 PM
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Our own garage door started opening and closing seemingly on its own. turns out I had left the remote control in my summer shorts. The xyl decided to wash them. And as it tumbled around, the falling weight of the wet clothing would press the button from time to time.
Amazing.
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