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Pages: Prev 1 ... 68 69 70 71 72 [73] 74 75 76 77 78 ... 89 Next
1081  eHam Forums / Elmers / got my license today, want HT advice on: April 14, 2008, 01:52:15 PM
Congratulations, welcome aboard!

Bill
1082  eHam Forums / Elmers / ATV on: April 13, 2008, 08:39:40 PM
How about using a regular TV wideband preamp?  They are available at Walmart and other stores selling TV's.

Bill
1083  eHam Forums / Elmers / Beginners ALL mode VHF/UHF on: April 13, 2008, 12:17:01 PM
Nobody is suggesting radios, so I will.  The Icom IC-910.  

After years of using mobile rigs inside, by golly, it's nice to have a full size, full feature radio that doesn't require cue cards to operate.   I bought it for satellite work and it works nicely with the tracking programs.   It's also a genuine pleasure to work the local repeaters and emergency services nets. Great audio, and I get good reports unsolicited.

Now, it comes with 2m, 440. There is an optional module for 1.2G.  The Icom folks are easy on the wallet since they have a variety of add-ons, that you can get as the need occurs and money is available.  I wish it had 6m, but hey, maybe I'll find a transverter to go with it.

Jump in, the water's fine.  73, Bill
1084  eHam Forums / Elmers / PL259 connector install - how to do it well? on: April 13, 2008, 11:10:16 AM
Try one of the real hardware stores like Ace.  They still carry the big Weller 80w & 100w irons in my area.

Bill
1085  eHam Forums / Elmers / Painting a Comet GP15 on: April 12, 2008, 02:19:09 PM
Do it!
1086  eHam Forums / Elmers / 1/4 wave Mobile 2M antenna on fiberglass on: April 12, 2008, 02:17:06 PM
you could also use adhesive aluminum duct tape.   You could put it inside the topper underneath where it can't be seen.   You want it to be at least equal in length to the antenna you are using.

This technique is also used for mounting antennas on fabric covered aircraft.

73, Bill
1087  eHam Forums / Elmers / Spider HF Mobile ant (K6AQI) design on: April 11, 2008, 09:10:45 AM
Looks like he has discontinued manufacturing.  He doesn't list a 160M element for the antenna.

http://www.spiderantenna.com/index.html

73, Bill
1088  eHam Forums / Elmers / Analog To Digital Conversion on: April 08, 2008, 09:59:53 AM
http://www.labjack.com

Just thought of these guys.  They make D/A A/D interfaces that are reasonably priced, around $120.  They come with drivers and documentation.  Many people use them to interface with Azimuth/Elevation rotors for satellite work (including me).   Many of the satellite tracking programs on the AMSAT website support the labjack U3 or U12.

cheers,  Bill
1089  eHam Forums / Elmers / Analog To Digital Conversion on: April 07, 2008, 12:36:29 PM
http://www.bwired.nl/

There he is.  I don't know how many wives would let their husband put their daily weight measurements on the internet.  Smiley
1090  eHam Forums / Elmers / Analog To Digital Conversion on: April 07, 2008, 12:31:37 PM
http://en.wikipedia.org/wiki/1-Wire

There is a family of chips based on the 1-wire data/control bus standard, as well as commercial sensors and controllers.   You can buy off the shelf, or build your own.   One fellow in Netherlands has his whole house energy and consumables wired to his computer for tracking and control, even monitoring his toilet flushes. Hah.   A similar standard is the "I2C" data/controller bus, with commercial devices and chips available.  

have fun!

Bill
1091  eHam Forums / Elmers / Repeater transceiver tones on: April 06, 2008, 09:11:53 PM
T would be the transmit tone.  TSQL, would be "tone squelch" the receive tone.  Don't know about the other.

BTW, what brand and model radio are you referring to?

Bill
1092  eHam Forums / Elmers / small yagi on: April 05, 2008, 05:36:01 AM
http://ac6v.com/antprojects.htm

http://www.cebik.com/radio.html


Knock yourself out!  heh.  You should also consider a 2 element quad, and a Moxon antenna.  They would be more compact and give roughly the same gain as a 2 element yagi.

Have fun.  Bill
1093  eHam Forums / Elmers / Widebanding on: April 02, 2008, 12:56:49 PM
Widebanding is modifying a radio to operate outside the Ham bands.  (new useage = within the last 10 -15 years). Though, one could apply the term to modifying a scanner to recieve cellular frequencies as well.

A transverter is a device that converters signals from one band to another.  One application is to use transverters to work 2m and 6m SSB with an HF rig.  Satellite ops use them for working 400Mhz and higher freqs, with a 2M rig.   Microwave buffs use them as well.

73, Bill
1094  eHam Forums / Elmers / RF Exposure Issues For Cell Phones - See Article on: March 31, 2008, 10:01:58 AM
May I point out that from the article, it appears that Dr. Kharana has done NO ORIGINAL RESEARCH, from which to base his announcements.   He surveyed (i.e. read) 100 studies conducted by other researchers, and made his conclusion.  At best, he performed a statistically valid meta-analysis.  Otherwise, it is just his personal opionion.

Note that he has made this announcement without scientific peer review, an increasingly common breach of scientific protocol.


1095  eHam Forums / Elmers / Stacking a Moxon on: March 30, 2008, 04:52:37 PM
For gain, I think a better and simpler choice is to buy or build a coaxial vertical dipole.  There are plenty of models for sale, and plenty of plans to build them.

73, Bill
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