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Design a yagi-uda antenna of 6 elements to provide gain of 12 db if the operating frequency is 200 MHz

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6ya6ya
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SOURCE:

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Posted on Jan 02, 2017

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map9966
  • 2351 Answers

SOURCE: RAM not running at full speed

Go to page 33 in your manual, see DRAM Clock/Drive Control & press enter. You can tweak your memory to run faster however your manual suggest not too. Hate to see you burn it up. As you will see everything is set to Auto:
Max Memclock (Mhz) [Auto]
1T/2T Memory Timing [Auto]
CAS# latency (Tcl) [Auto]
When DDR Timing Setting by is set to Manual, use this item to set the DRAM frequency. Would be nice to have a side panel fan blowing on your memory.
Link to your board.: http://www.ecsusa.com/ECSWebSite/Products/ProductsDetail.aspx?detailid=455&DetailName=Specification&MenuID=1&LanID=9

Posted on Jan 04, 2008

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Agent Ken
  • 250 Answers

SOURCE: choosing the right frequencies for Uniden GMR1058-2CKB

Hello huko,

I see from your profile that you are in Bulgaria. Assuming that you are using the European PMR446 version of the Uniden radio in question, the channels / frequencies should be;

1 - 446.00625 MHz
2 - 446.01875 MHz
3 - 446.03125 MHz
4 - 446.04375 MHz
5 - 446.05625 MHz
6 - 446.06875 MHz
7 - 446.08125 MHz
8 - 446.09375 MHz
So, to operate on 446.09375 MHz you would chose channel 8.

If your radio has more then 8 channels, then you may have the U.S. version of the radio which operates on a different set of frequencies and does not have a channel that corresponds to 446.09375 MHz.

Best Regards,
Ken
Go Ahead. Use Us.

Posted on Apr 23, 2008

ALLEN CLARKE
  • 47 Answers

SOURCE: maxon SL25

if the band assigned to the radio doesn't cover the frequencies you want then it will not happen. you need to get the software and the right programming lead. make sure the mic socket is good and clean

Posted on Nov 27, 2008

  • 2679 Answers

SOURCE: Sony Driver

Without the model number the above is meaningless.

Posted on Jul 30, 2009

sodeep
  • 3267 Answers

SOURCE: SONYVAIO-PC

You dont need any driver since your PC is configured as x64 bit processor so all you got to do is get hold of the XP OS which is meant for x64 compatible PC's. The one normally used is 32 bit named as x86. I hope u wont face any difficulty in getting hold of x64 based OS(XP)......sodeep

Posted on Jul 31, 2009

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Tabla de frecuencias


CB Radio Channels (FCC)[32] Channel Frequency Channel Frequency Channel Frequency Channel Frequency 1 26.965 MHz 11 27.085 MHz 21 27.215 MHz 31 27.315 MHz 2 26.975 MHz 12 27.105 MHz 22 27.225 MHz 32 27.325 MHz 3 26.985 MHz 13 27.115 MHz 23 27.255 MHz 33 27.335 MHz 4 27.005 MHz 14 27.125 MHz 24 27.235 MHz 34 27.345 MHz 5 27.015 MHz 15 27.135 MHz 25 27.245 MHz 35 27.355 MHz 6 27.025 MHz 16 27.155 MHz 26 27.265 MHz 36 27.365 MHz 7 27.035 MHz 17 27.165 MHz 27 27.275 MHz 37 27.375 MHz 8 27.055 MHz 18 27.175 MHz 28 27.285 MHz 38 27.385 MHz 9 27.065 MHz 19 27.185 MHz 29 27.295 MHz 39 27.395 MHz 10 27.075 MHz 20 27.205 MHz 30 27.305 MHz 40 27.405 MHz

Oct 18, 2013 | Connex 3300 240-Channels Base CB Radio

6 Answers

Cable modem 315


Have a look at the link below for basic troubleshooting techniques for RCA modem

Troubleshooting DCM 315

Oct 13, 2008 | Computers & Internet

Tip

Building your own Antennas


To build antennas for any frequency use formula L=234/Freq. Lets say 100 mhz. That would be L=2.34 feet or about 30 inches(close). Ok, Build a dipole antenna with a plastic insulator and 75 ohm Tv Coax. Take stiff alumnium rods or wire. Punch a hole into a plastic piece 4 inches apart. Insert Rods on both sides. Take shiny screws (Not Painted). attach Center Coax to Right side and Shield (ground) to Left side. Silicone these connections and use Black tape to wrap it good. Mount it on your Chimney or on a Tv pole 12-25 feet. Now, the coax coming into your house has to hook to your stereo by a 75 ohm match coil bought cheap at Electronic stores or Tv, radio supply stores. Attach coax by screwing it to coil and the two prongs screw to Back of your Fm Stereo. It will say ANT and GND. on back of Radio. You should pull in Fm stations better than indoor antennas and get farther away stations. It may have a 3 Db gain. Its the same for Cb radio --Just Use L=234/Freq. it comes to 8.5 feet(102 inches) Roughly. Its all Dipole Technology ..No Commercial antenna but will get decent results.

on Apr 01, 2011 | Audio Players & Recorders

1 Answer

WIRELESS OUT OF RANGE


Move closer. That's not always an option though. Here are some tips to improve the range of wireless routers:

1) Locate the router higher in the building rather than lower (1st or second floor is better than a basement location).

2) Place the router in a location that will offer the least resistance to the signals - it is easier to pass wifi signals through gypsum board than it is for concrete / brick or walls with aluminum siding on them.

3) Change the antenna(s) on the router to a type that offers more gain. Typical router omni directional antennas offer 3dB to 5dB or gain - there are others that offer 7 dB or more of omnidirectional gain for reasonable prices. The antenna gain works for both transmit from and receive to the router.

4) if the device you wirsh to connect to the router is in one place, consider a directional Yagi antenna. These antennas concentrate the entire wifi signal in a direction that is 30 degrees wide and can allow the signal to be seen 5, 6 or even more times further in one direction - instead of being spread out over 360 degrees. These antennas cost a little more, but can solve the problem quickly.

5) Replace the manufacturer's stock firmware of selected routers with a 3rd party type such as DD-WRT or Tomato. Either of these will work with your Linksys WRT54G router. One of the benefits is the ability to boost output power of the wifi radio in the new settings the firmware offers. Read about both and decide if either is something you're comfortable doing.

6) Add additional wifi routers configured as a bridge or an access point to extend the wifi signal into an underserved area. DD-WRT supports bridging as shown here.

I hope this helps & good luck!

Jan 30, 2013 | Linksys Wireless-G WRT54G Router

1 Answer

Is there a way to change the frequency of a specific channel?


FRS & GMRS frequencies have been preset by the governing bodies where these radios are licensed for use. They consist of Ch 1 - 14 for FRS or Family Radios Service (the new "CB" radio) and Ch 15 - 22 for GMRS or General Mobile radio Service. GMRS frequencies may be repeated 5 Mhz higher - the repeater input of channel 22 (462.750 Mhz) may be heard if close to the transmitter on Ch 22, but if a repeater has been set up to repeat signals in range on Ch 22, they would also be heard on 467.750 Mhz. The repeater will likely have one or more of the following: a high vantage point such as a hill or mountain top, may increased output power of up to 50 watts, or have an antenna with gain properties. Any one or combination of any of these benefits, will result in a significantly increased area of coverage.

FRS Frequencies Channel Frequency in MHz 1 462.5625 2 462.5875 3 462.6125 4 462.6375 5 462.6625 6 462.6875 7 462.7125 8 467.5625 9 467.5875 10 467.6125 11 467.6375 12 467.6625 13 467.6875 14 467.7125 15 462.550 16 462.575 17 462.600 18 462.625 19 462.650 20* 462.675* 21 462.700 22 462.725

It is important to note that only Ch 1 - 14 may be used without a license. Transmitting on any of the GMRS frequencies (Ch 15 - 22) shown in red in the chart above, requires an FCC license if used in the U.S.A. Other countries may or may not have laws for licensing the use of any or all these frequencies, so check before transmitting. Modifying an FRS / GMRS radio is a violation of FCC rules and if caught; can result in fines, prison or both.

If you'd like to be able to tune actual frequencies - and not be limited to specific channels, you ought to look into amateur ("ham") radio. While not in the FRS or GMRS bands, there are literally hundreds of thousands of frequencies to use once licensed. The ARRL (American Radio Relay League) has a great deal of info about ham radio.

I hope this helps & good luck! Please rate my reply - thanks!

Feb 03, 2011 | Motorola TalkAbout T5530 2-Way Radio

1 Answer

Hi, I am thinking of buying a dx-95t. I am a novice but I do not want to start with some rubbis and upgrade later. It would be used in a house in Budapest Hungary to communicate with friends locally or...


To be able to get the same distance in all directions for local use the best type of antenna is a vertical with as much gain as possible. Most makers quote gain in db and this means how much better the antenna is than a plain wire antenna. This antenna will also work for dx on sidebands but the signal goes out in all directions the same distance.

If you want to get a longer range in one direction you have to sacrafice the distance in other directions. To do this you need a directional beam antenna. There are several brands with very little between any of them. What you need to be looking at, if you decide to use a beam type antenna is either "yagi" or "log periodic array" antennas. These are types of antenna rather than brand names. The log periodic array will give the longest range and the yagi will give the next best. Log periodics are very expensive but give the best results. Yagis come with different amount of elements. The more elements it has the better it works but even yagis with 3 to 4 elements give significant improvements over vertical antennas. Because both these type antennas concentrate the signal in one direction you need to be able to rotate it to the direction you want to send, and receive, the signal unless you only want to send it one direction. This means that you might need a mast and rotator which allows you to turn the antenna from a control beside the radio. These make the hobby even more expensive so it depends on how much you can afford to spend. Also make sure that the antenna you buy is resonant on the frequency you'll be operating on i.e. 27Mhz. Otherwise you'll burn out your radio. If you google the different types of antennas you'll find places selling them. You can also buy an antenna tuner that matches antennas to your radio if the frequency is not exactly matched to the radio. It reduces your power out a little but makes very little difference to the range of your signal. Also get the antenna as high as possible to a maximum of 30 feet. After that the gain is offset by the loss of signal through the co-ax cable. Use low loss co-ax cable to reduce the amount of signal you lose between the radio and the antenna.

Having said that I've contacted America from the west of Europe several times using a vertical antenna so you might not want to go for the best.

You need to be aware that there's an eleven year sunspot cycle which affects the long range radio communications. At the height of the sunspot activity you'll get long ranges without any difficulty and at the low you'll rarely get long range. At the moment we're just coming out of the low so it will be another few years before we reach a high. Just don't judge your dx activity on how well you do at the moment.

Good luck with the radio and if you enjoy it consider becoming an amateur radio operator. It gives you more frequency bands to use so the sunspot activity doesn't limit you so much as other frequencies improve with low sunspots. I started off with CB and am now an amateur radio operator for over 30 years.

Jan 15, 2011 | Galaxy Radios DX-95T Base CB Radio

1 Answer

Can i hook this amp to a 2 channle out put stereo?


Sure. Specs are listed below. I think it's designed for regular 2-channel input, isn't it?

jturcotte_41.jpg

Front Channels: 100 W RMS x 2 @ 1.5 ohm-4 ohm (11V-14.5V)
  • Rear Channels: 25 W RMS x 2 @ 1.5 ohm-4 ohm(11V-14.5V)
  • Subwoofer Channel: 250 W RMS @ 1.5 ohm-4 ohm (11V-14.5V)
  • THD at Rated Power: <0.03% @ 4 ohm (F&R), <0.05% @ 4 ohm (Sub)
  • S/N Ratio (F&R): >108.5 dB below rated power S/N Ratio (Sub): >95 dB below rated power
  • Frequency Response (front and rear): 5 Hz-30 KHz (+0, -1dB)
  • Frequency Response (sub channel): 5 Hz-500 Hz (+0, -1dB)
  • Damping Factor (front and rear): >200 @ 4 ohm/50 Hz
  • Damping Factor (sub channel): >500 @ 4 ohm/50 Hz
  • Input Range: switchable from 200mV-2V RMS to 800mV-8V RMS
  • Differential-Balanced Input Topology: (3 pairs of inputs)
  • Front Crossover: fully-variable (50 Hz-5 KHz), selectable- slope BP or HP (12 or 24 dB per octave)
  • Rear Crossover: fully-variable (50 Hz-5 KHz), selectable- slope HP (12 or 24 dB per octave)
  • Sub Crossover: fully-variable (40-200 Hz), selectable-slope LP (12 or 24 dB per octave)
  • Preamp Output: 2-channel (full-range or LP)
  • Bass EQ: Variable boost up to 15db
  • Infrasonic Filter: defeatable 24dB/octave at 30 Hz
  • Left minus Right Ambience Circuit: ambient effect for rear channels
  • Front and rear speaker output connections: accept up to 8ga. wire
  • Dual mono subwoofer output connections: accept up to 8ga. wire
  • +12V and Ground connections: accept up to 4ga. Wire
  • Dimensions: 19.7"L x 9.25"W x 2.36"H
  • Dec 02, 2010 | Jl Audio 500/5 Car Audio Amplifier

    2 Answers

    Antenna


    You will need to buy a signal amplifier antenna. One that doe not have to be connected to the radio. It will provide the amplified signal and the radio antenna (the a/c line cord and the back of the clock/radio) will be able to pick up the signal from the amplified antenna.[http://www.radiolabs.com/products/antennas/am-antenna.php] this web link will show you one type of these antenna's. Copy the web link and paste it into the address bar in your browser. It will take you to the website. There maybe other types of these antenna's but this one had the best price. Call the store and talk to them before you buy the antenna to make sure it will work in your situation. I hope this information helps you with your antenna problems.

    Sep 13, 2008 | Emerson Smartset Clock Radio

    1 Answer

    Choosing the right frequencies for Uniden GMR1058-2CKB


    Hello huko,

    I see from your profile that you are in Bulgaria. Assuming that you are using the European PMR446 version of the Uniden radio in question, the channels / frequencies should be;

    1 - 446.00625 MHz
    2 - 446.01875 MHz
    3 - 446.03125 MHz
    4 - 446.04375 MHz
    5 - 446.05625 MHz
    6 - 446.06875 MHz
    7 - 446.08125 MHz
    8 - 446.09375 MHz
    So, to operate on 446.09375 MHz you would chose channel 8.

    If your radio has more then 8 channels, then you may have the U.S. version of the radio which operates on a different set of frequencies and does not have a channel that corresponds to 446.09375 MHz.

    Best Regards,
    Ken
    Go Ahead. Use Us.

    Mar 14, 2008 | Uniden GMR1058-2CK (7 Channels) 2-Way...

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