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1066  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
1067  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
1068  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
1069  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
1070  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
1071  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.


1072  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
1073  eHam Forums / Elmers / TM-D700 pinout separation cable on: March 29, 2008, 10:32:34 AM
The other alternative is to buy a prefab cable, cut it in the middle and splice in your required length.  Again, you don't need to know WHAT is carried on each wire.  Just match color to color.

GUL,  Bill
1074  eHam Forums / Elmers / Radials on only one side of vertical antenna on: March 24, 2008, 09:57:54 AM
Anything you do in laying radials is better than nothing.

If it's silly and it works, its not silly.

73,  Bill   Smiley
1075  eHam Forums / Elmers / RF In Shack and Ground For A Second Floor on: March 14, 2008, 07:39:37 PM
one point is that on 10M any ground wire length is going to be close to being a radiator.  Then you are better off not having the wire.

The counterpoise is a good procedure.  And the line isolator between the radio and tuner should break the chain.

good luck,  Bill
1076  eHam Forums / Elmers / Alpha Delta coax switch to switch radio's ?? on: March 11, 2008, 11:23:05 PM
mini 8, or RG8X is fine for jumpers.
1077  eHam Forums / Elmers / WWV off on: March 10, 2008, 02:28:40 PM
a minor rift in the space-time continuum.  Not to worry.
1078  eHam Forums / Elmers / source for pots on: March 08, 2008, 12:05:22 PM
Mouser.com
digikey.com
allied electronics.

73, bill
1079  eHam Forums / Elmers / Beginner Question on: March 05, 2008, 08:06:04 AM
Yep. RTTY mode has a carrier, so you will see output on the meter roughly equal to what is selected on the radio, e.g. 50W = 50W.   You can adjust the tuner in this mode.

SSB has no carrier, so you will not see any output on the meter until you start talking.  The output on SSB is much lower than what is selected, e.g. 50W on the radio will at best show maybe 15-20W on the meter.  Because of the constant variance SSB is not a useable mode to adjust the tuner.

CW mode has a carrier, but does not transmit anything until you close the key.  Like RTTY, selected power on the radio = meter output.   CW is generally the preferred mode to use in tuning up (at low power initially).

So, review your radio tune up settings in the manual. Review the tuner procedures.  Start with CW about 10 watts, and lock the key down.  Adjust the tuner.  If desired go to a higher power for final tweaks. Be sure you have the correct power ranges selected on the tuner.  Also use Average vice Peak power on the meter.  Ensure that you have a strap/wire between the radio and tuner ground points.

give it a whirl.

73, Bill
1080  eHam Forums / Elmers / 2 element yagi, worth the trouble ? on: March 02, 2008, 02:28:52 PM
Yes!  And to reiterate, a quad would be more compact and lighter.

Experiment!

73, Bill
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