Simple Transistor Tester with mA meter as Indicator

This Transistor circuit Tester use for testing whether your transistor it still in good condition or not. This circuit of transistor tester using mA meter as an Indicator.

This Transistor Tester use for check whether the transistor tested in good condition or not. If the transistor tested still in good condition, mA meter pin will move , if the transistor tested not in good condition mA meter will not move or steady.
Switch S1 and S2, is sliding switch for setting whether the transistor tested is NPN or PNP.

S3 is sliding switch for set capacity power of mA, in this circuit we use 1 mA meter.
S4 is Push On Switch for giving voltage current to tested transistor.

When we want to tested NPN Transistor, Switch S1 and S2 we connect to Q2 and Q4, and press Push On Switch S4 to test the transistor . If the transistor in Good condition, the pin of mA meter will move to on a number of measurement. If the transistor in not works well , the pin of mA meter will not move .

WSPR Radio Receiver Kit for 20 Meter Amateur Band Model RK-20

• Have fun receiving WSPR signals from around the world.
• Electronic Kit - Soldering and Assembly Required.
• Kit is for Intermediate to Advanced builders - not for beginners.
• Needs PC, USB port, sound card and free WSPR software to operate.
• User supplied antenna is required. No enclosure supplied.

Want some fun receiving specially coded WSPR radio signals from around the world. This receiver may be what you need. A PC with USB port and sound-card is needed. To operate you must install free software (search the web for WSPR software and articles). User supplies antenna wire and ground to operate. Power is taken from USB. The "weak signal propagation reporter" software or WSPR is designed to communicate with low power by Amateur Radio operators. Only 20M WSPR signals may be received with this unit. Photo shows all items in kit. Partially assembled kits may not be returned.
For WSPR software, you can download here for free use.

World Band Radio Antenna

• *The AN-LP1 is not recommended for use with Sony models ICF-SW10, ICF-SW11, ICF-SW77.
• *The AN-LP1 derives power from the radio when connected to Sony models ICF-SW1000T and ICF-SW7600G.

The Sony AN-LP1 portable active antenna is just right for travelers who wants maximum performance from their world band radio. The flexible folding loop antenna is 19 inches (48 cm) when open, but folds down with a twist to a mere 7 inches (18 cm) and neatly fits in the supplied soft carrying case. A mounting clip and suction cup on the end of the loop allows easy placement in a variety of situations. The suction cup is especially useful for mounting the antenna to a window where reception will often be the best. A reselection knob selects operation from 3.85-21.95 MHz. The AN-LP1 requires two AA cells for about 40 hours of use. The supplied cable connecting the loop to the ANl-LP1 control box is 12 feet long. The supplied cable connecting the control box to the radio is 8 inches long. Output is to a 3.5 mm mini plug. Comes with an English, French, German and Japanese instructions from Sony. Item is made in Japan.

AM FM Radio Kit, Good for Educational

This Kit AM FM Radio, good for educational purposed for building AM FM Radio and for knowing more AM FM radio receiver . 

This Kit come with books as a guide for study more about the AM FM circuit, start from Audio Amplifier, AM Detector, AM IF, AM Amplifier, AM Mixer & Oscillator, FM Detector, 1st FM IF, 2nd FM IF, and FM RF Stages. Superheterodyne receiver of standard AM and FM broadcast frequencies.

 

• AM/FM Radio Kit (Combo IC & Transistor)
• Includes 64 page educational training guide
• with multiple choice questions and answers
• Training course of 56 pages is divided into 9 lessons: Audio Amplifier, AM Detector, AM IF, AM Amplifier, AM Mixer & Oscillator, FM Detector, 1st FM IF, 2nd FM IF, and FM RF Stages. Superheterodyne receiver of standard AM and FM broadcast frequencies. Makes an excellent classroom project. Requires 9V battery, not included.

FM Radio Kit with Auto Scan Frequency

This Kit FM Radio Using IC as FM Tuner and IC for Amplifier. This FM Radio Kit scan FM frequency in 88-108 MHz and using auto scan  for scans up and for reset.

• Build this kit to assemble a monophonic FM receiver (88-108mhz) with electronic auto-scan
• Will help you understand the basics of working with printed circuit boards
• Become familiar with a variety of electronic components
• Develop good soldering skills
• For 30 years Elenco has been using their strong engineering and design skills to develop reliable, affordable electronic test equipment, tools, and educational kits
  This kit is a monophonic FM (frequency modulation) receiver designed to receive FM signals in the frequency range (88-108mhz) it uses electronic auto-scan to search for FM stations. This scan system is done with two button switches-one switch scans up, the other resets to the start of the tuning position.
  

1byone® Window Antenna 50 Miles Super Thin HDTV Antenna with 20ft Coaxial Cable, Extreme Soft Design and Lightweight

• FREE FOR LIFE - Never Pay Your Cable or Satellite For Television Again! 1byone antenna can pull in all of your local news, weather, sitcoms, kids and sports programming with NO monthly contract or bills. Just plug it in and connect to your television and let the antenna do all the work.
• WINDOW ANTENNA - This 1byone window antenna is specially designed to match your window decoration. With its crystal transparent look and grace strips, it looks like a gorgeous art designed for your window.
• DETACHABLE AMPLIFIER - A detachable amplifier and USB power adapter give you a better choice. If your tv picture is not crystal clear, or you can not get the weak signals from far away towers, you can use this amplifier to boost the weak signals. Remove the amplifier/booster if your house is very close to the broadcast tower with strong signals. A booster will cause self-oscillate and you may get fewer signals than without.
• FULL HD, LONGER RANGE - 50 miles range to access from broadcast tower. It delivers full 1080p HD to any digital-ready TV. Comes with a 20-foot coaxial cable for greater flexibility. Makes it easier for you to place it in your house to get the best reception, especially for customers whose televisions are quite far away from windows.
• BUYER GUARANTEE - We stand behind our antenna 100% with one year warranty. Please Note: Freeview reception is dependent upon environmental factors, we cannot guarantee reception in all conditions. We do offer a 30 day money back guarantee on all new items in order for you to test the suitability in your area.

 Antenna HDTV with amplifier for 50 miles range , with elegant and soft design 

Amplifier 

Installation Diagram of HDTV Antenna

 Installation HDTV Antenna on Windows, simple and aesthetic

Antenna Installation 

Antenna Pattern and Model

Super Thin HDTV Antenna with Detachable Amplifier Signal Booster for the Highest Performance the Longest Reception Range, 10ft Coax Cable, Bigger Flat Size Gets the Larger Reception Range

• FREE FOR LIFE - Never Pay Your Cable or Satellite For Television Again! You Can Get All Local Crystal Clear Channels Absolutely Free! 1byone antenna can pull in all of your local news, weather, sitcoms, kids and sports programming with NO monthly contract or bills. Just plug it in and connect to your television and let the antenna do all the work.
• DETACHABLE AMPLIFIER KIT - Attach the amplifier kit and boost 15 miles range! TV reception may vary depending on your local surroundings. If you get fewer channels, remove the amplifier kit. (Note: the amplifier may cause self-oscillate if your house is super close to the broadcast tower.) The detachable amplifier kit gives you two options!
• HIGHER QUALITY - This 1byone HDTV Antenna will be the LAST antenna you will need to buy! If you have ever purchased other brand antennas, you will find out that 1byone antenna definitely is higher quality! There are so many hdtv antennas on the market at around $15, but some of the antennas are made of inferior materials, which can't stand moisture weather or exposed to sunshine. Buy 1byone tv antenna, you will get the real thing. You'll find out it's worth each dime you spent!
• LONGER CABLE, EASIER SETUP - a longer cable makes it easier for you to place it at the best position in your house to get the best reception, especially for customers whose televisions are quite far away from windows. 1byone has very detailed setup instructions coming with the package. You also can get to Customers Service for help. Buy 1byone antenna; get rid of any setup problems.
• BUYER GUARANTEE - We stand behind our antenna 100% with one year warranty. Please Note: Freeview reception is dependent upon environmental factors, we cannot guarantee reception in all conditions. We do offer a 30 day money back guarantee on all new items in order for you to test the suitability in your area.