Design Con 2015
Breaking News
Comments
Newest First | Oldest First | Threaded View
Page 1 / 2   >   >>
GarySXT
User Rank
Freelancer
Re: Wind Power?
GarySXT   7/23/2014 5:09:39 PM
NO RATINGS
I have specialized as the FD 40M CW op for about 25 years.  Polarization is a big help with inter-station interference.  I also use several antennas with different take off angles for different target ranges.  The NVIS is best out to around 200 miles. A dipole at 30' is best from around 200 miles to 600 miles or so, and a vertical with elevated tuned radials for longer distances.

I have a power splitter so I can feed them one at a time or multiple antennas and still show the transmitter 50 ohms.

This is from the Midwest.  From eastern Oregon you probably don't have a lot of stations in the 100 mile range or so,  and the NVIS might not be that useful.

elizabethsimon
User Rank
CEO
Re: Wind Power?
elizabethsimon   7/23/2014 11:26:40 AM
NO RATINGS
That sounds like a good idea. I've got a surplus military mast of the type where you assemble sections and then have to rais it to a vertiacl position. A telescoping mast sounds like it should be easier...

For Field day, we've found it preferable to have a mix of horizontally polarized and vertcally polarized antennas to reduce the interferenced between stations.

 

GarySXT
User Rank
Freelancer
Re: Wind Power?
GarySXT   7/23/2014 9:18:39 AM
NO RATINGS
I really like surplus telescoping military mast for supporting dipoles at Field Day.  It is easy to transport and set up.

mhrackin
User Rank
CEO
Re: Wind Power?
mhrackin   7/17/2014 5:32:10 PM
NO RATINGS
To invoke "The Graduate" I have one word for you:  "Verticals."

elizabethsimon
User Rank
CEO
Wind Power?
elizabethsimon   7/17/2014 5:29:17 PM
NO RATINGS
Wind power sounds like an interesting idea...

I've since moved to eastern WA where we have plenty of wind but whether we have any on Field day is always the question... And then theres finding and getting permission to operate at a wind farm.

Of course that the problem is that good wind sites usually don't have trees so we'd have to come up with an alternate plan to string antennas.

 

mhrackin
User Rank
CEO
Re: What about?
mhrackin   7/17/2014 12:06:17 PM
NO RATINGS
Your fuel-cell powered FD is just a mildly updated version of what I remember of my days with IRAC (Irvington NJ Radio Amateur Club) more than 50 years ago.  We used multiple 3KVA gasoline-fueled generators for our 3-4 rig Field Day station, along with a lot of "festoon" strings of 115V incandescent lamps along the paths connecting the tents.  Maybe you should try to get permission to use a wind-power site next year (as you seem to be in CA, there should be some not too far away).  Of course, you might have some Doppler modulation effects from the turbine blades!

I'm still Advanced class, W4LGN, but inactive these days. 

Max The Magnificent
User Rank
Blogger
Re: Field-day radio
Max The Magnificent   7/17/2014 12:01:29 PM
NO RATINGS
@mhrackin: It's like the old saying "Ve grow too soon old und too late schmart!"

I'll drink to that LOL

mhrackin
User Rank
CEO
Re: Field-day radio
mhrackin   7/17/2014 11:53:17 AM
NO RATINGS
No, Max, I noticed the same phenomenon quite a few years ago.  It's like the old saying "Ve grow too soon old und too late schmart!"

elizabethsimon
User Rank
CEO
Re: What about?
elizabethsimon   7/17/2014 11:46:33 AM
NO RATINGS
George,

Actually, I was just thinking about the time you joined us for Field day with the Alameda county club...

It's been a long time but I still remember.

 

KC0GP
User Rank
Rookie
Re: What about?
KC0GP   7/17/2014 11:02:59 AM
NO RATINGS
Hey, remember me? Saw a posting about your article in a daily email I get about Ham Radio news around the world and wondered if you would know who I am?

 

George Pease

KC0GP

Page 1 / 2   >   >>


Top Comments of the Week
Flash Poll
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Max Maxfield

Want a Voltera Desktop PCB Printer?
Max Maxfield
21 comments
I just received an email from my chum Javi in Spain. "Have you heard about Voltera (VolteraInc.com)? It's a Canadian company that is going to offer desktop-size PCB printers for fast ...

Aubrey Kagan

Have You Ever Been Blindsided by Your Own Design?
Aubrey Kagan
37 comments
I recently read GCHQ: The uncensored story of Britain's most sensitive intelligence agency by Richard J. Aldrich. The Government Communication Headquarters (GCHQ), Britain's equivalent of ...

Martin Rowe

No 2014 Punkin Chunkin, What Will You Do?
Martin Rowe
2 comments
American Thanksgiving is next week, and while some people watch (American) football all day, the real competition on TV has become Punkin Chunkin. But there will be no Punkin Chunkin on TV ...

Rich Quinnell

Making the Grade in Industrial Design
Rich Quinnell
15 comments
As every developer knows, there are the paper specifications for a product design, and then there are the real requirements. The paper specs are dry, bland, and rigidly numeric, making ...

Special Video Section
The LT8640 is a 42V, 5A synchronous step-down regulator ...
The LTC2000 high-speed DAC has low noise and excellent ...
How do you protect the load and ensure output continues to ...
General-purpose DACs have applications in instrumentation, ...
Linear Technology demonstrates its latest measurement ...
10:29
Demos from Maxim Integrated at Electronica 2014 show ...
Bosch CEO Stefan Finkbeiner shows off latest combo and ...
STMicroelectronics demoed this simple gesture control ...
Keysight shows you what signals lurk in real-time at 510MHz ...
TE Connectivity's clear-plastic, full-size model car shows ...
Why culture makes Linear Tech a winner.
Recently formed Architects of Modern Power consortium ...
Specially modified Corvette C7 Stingray responds to ex Indy ...
Avago’s ACPL-K30T is the first solid-state driver qualified ...
NXP launches its line of multi-gate, multifunction, ...
Doug Bailey, VP of marketing at Power Integrations, gives a ...
See how to ease software bring-up with DesignWare IP ...
DesignWare IP Prototyping Kits enable fast software ...
This video explores the LT3086, a new member of our LDO+ ...
In today’s modern electronic systems, the need for power ...