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Steve - K4HX
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« Reply #1 on: February 24, 2011, 02:13:31 PM » |
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Will my G5RV work?
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w5omr
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« Reply #2 on: February 24, 2011, 02:37:07 PM » |
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Will my G5RV work?
1/4w is something like 507' long... and mobile experience tells me that the lower in frequency, the more critical the tuning is on an antenna, and the higher the Q gets, because physical limitations will keep it so relatively close to the ground... unless it's a loop antenna. Homebrewed tuner (with extra amounts of Fixed-L added in series - Air-dux, anyone?) and some W-I-D-E spaced capacitors, feeding open-wire line to a loop that's >1000' in overall length. That band should quickly become know as "Ranchers Frequencies", because only Ranches will have enough real-estate to erect any kind of half-way decent antenna! |
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KB2WIG
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« Reply #3 on: February 24, 2011, 02:55:50 PM » |
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G,
Dont worry 'boute that... MFJ will make a tuna for Steves g5rv.
klc
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What? Me worry?
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WB2EMS
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« Reply #4 on: February 24, 2011, 03:22:38 PM » |
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Might become a popular band if it's below the lowest frequency threshold of BPL emissions.  |
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73 de Kevin, WB2EMS
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w5omr
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« Reply #5 on: February 24, 2011, 03:38:57 PM » |
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G,
Dont worry 'boute that... MFJ will make a tuna for Steves g5rv.
I can't believe the HUZman has a dummy-lo...er, G5RV (off-center fed coat hanger) for an antenna... |
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KA0HCP
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« Reply #6 on: February 24, 2011, 04:43:41 PM » |
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Well Alright! I've been making sketches for a Flat Top Tee antenna and eyeballing which trees to hang it from.
A fellow could sneeze and be off frequency with only 15kc's, but it is a start. General aviation is rapidly changing over to glass cockpits with satellite weather, notams, synthetic 3d map displays and approach guidance. The FAA started abandoning Non Directional Beacons over ten years ago, which should open more and more space between 200 and 500kc for amateur radio to request in the future.
Bill
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New callsign KA0HCP, ex-KB4QAA. Relocated to Kansas in April 2019.
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Steve - K4HX
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« Reply #7 on: February 24, 2011, 05:20:35 PM » |
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Several AMers have been using the 500 kHz experimental allocation for several years. Jay - W1VD is but one. http://www.w1vd.com/Here's Jay's transmit antenna. No ranch required. http://www.w1vd.com/XNStxantenna.html |
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w5omr
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« Reply #8 on: February 24, 2011, 06:57:06 PM » |
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Several AMers have been using the 500 kHz experimental allocation for several years. Jay - W1VD is but one.
Here's Jay's transmit antenna. No ranch required.
Uhm... no way you can get a pair of 95' towers in a 60x120' residential lot... |
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KF1Z
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Are FETs supposed to glow like that?
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« Reply #9 on: February 24, 2011, 07:30:08 PM » |
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I even know of a company making mono/dual band SDR transcievers for 500khz ( and 137khz ).
I think they'll be around $200.
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Steve - K4HX
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« Reply #10 on: February 24, 2011, 09:53:20 PM » |
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You said ranch homey! Several AMers have been using the 500 kHz experimental allocation for several years. Jay - W1VD is but one.
Here's Jay's transmit antenna. No ranch required.
Uhm... no way you can get a pair of 95' towers in a 60x120' residential lot... |
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w5omr
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« Reply #11 on: February 25, 2011, 10:23:46 AM » |
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You said ranch homey!
Yeah, I did. Define "Ranch" ;-) I see a Ranch as 5+ acres. 50x100, or 60x120, or even a 100x200 lot won't support an antenna for 461kHz! 20 100' zig-zag runs, back and forth in a wwwwwwwwwww type of configuration? ;-) Ranch, bro... you gots ta have acreage! Like Don, or Timtron... (hey, I seen Pictures!) ;-) |
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Steve - K4HX
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« Reply #12 on: February 25, 2011, 12:17:08 PM » |
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You're from Texas and you call five acres a ranch? They're gonna take away your citizenship!  |
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w5omr
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« Reply #13 on: February 25, 2011, 12:40:36 PM » |
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You're from Texas and you call five acres a ranch? They're gonna take away your citizenship! It's more of a 'spread' than any place I've ever lived! ;-) |
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Steve - K4HX
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« Reply #14 on: February 25, 2011, 01:45:57 PM » |
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Me too. Keep the dream alive.  |
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w5omr
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« Reply #15 on: February 25, 2011, 03:21:30 PM » |
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Anyone on 15m? I'm on 21.245, now!
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w5omr
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« Reply #16 on: February 25, 2011, 03:22:49 PM » |
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21.425, that is...
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Steve - K4HX
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« Reply #17 on: February 25, 2011, 03:38:04 PM » |
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