Crystal Radio

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CB or Ham Radio Crystal Holder 417 - 7.8600 MHZ 7860 KC CR-1 C/AR DC-30
CB or Ham Radio Crystal Holder 417 - 7.8600 MHZ 7860 KC CR-1 C/AR DC-30
US $3.98
 CB or Ham Radio Crystal - 513 - 28.8550 MHZ - 28855 KC - HC-6/U .050 Pins
CB or Ham Radio Crystal - 513 - 28.8550 MHZ - 28855 KC - HC-6/U .050 Pins
US $4.00
 CB or Ham Ham Radio Crystal Holder 682 - 23.6600 MHZ 23660 KC MA20W JKF
CB or Ham Ham Radio Crystal Holder 682 - 23.6600 MHZ 23660 KC MA20W JKF
US $3.98
 CB or Ham Radio Crystal Holder 2297 - 7.211111 MHZ 7211.111 KC CR-18/U
CB or Ham Radio Crystal Holder 2297 - 7.211111 MHZ 7211.111 KC CR-18/U
US $3.98
10 NEW SYLVANIA 1N34A VINTAGE CRYSTAL RADIO DIODES
10 NEW SYLVANIA 1N34A VINTAGE CRYSTAL RADIO DIODES
US $11.08
 CB or Ham Radio Crystal Holder 2298 - 33.3000 MHZ 33300 KC JKF
CB or Ham Radio Crystal Holder 2298 - 33.3000 MHZ 33300 KC JKF
US $3.98
 CB or Ham Radio Crystal Holder 2299 - 8.183333 MHZ 8183.333 KC CR-18/U CZX
CB or Ham Radio Crystal Holder 2299 - 8.183333 MHZ 8183.333 KC CR-18/U CZX
US $3.98
 CB or Ham Radio Crystal Holder 2300 - 28.6450 MHZ - 28645 KC CHG-1R DSRM
CB or Ham Radio Crystal Holder 2300 - 28.6450 MHZ - 28645 KC CHG-1R DSRM
US $3.98
CB or Ham Radio Crystal Holder 1750 - 33.2950 MHZ 33295 KC TENN XTAL (2940)
CB or Ham Radio Crystal Holder 1750 - 33.2950 MHZ 33295 KC TENN XTAL (2940)
US $3.98
 CB or Ham Radio Crystal Holder 300 - 7.232291 MHZ 7232.291 KC GE
CB or Ham Radio Crystal Holder 300 - 7.232291 MHZ 7232.291 KC GE
US $3.98
 CB or Ham Radio Crystal Holder 600 - 8.235714 MHZ - 8235.714 KC CR-18A/U (2528)
CB or Ham Radio Crystal Holder 600 - 8.235714 MHZ - 8235.714 KC CR-18A/U (2528)
US $3.98
 HAM RADIO QUARTZ CRYSTAL 10000.00 kHz - 10,000 MHz - 10,000 Mc CALIBRATOR HC6U
HAM RADIO QUARTZ CRYSTAL 10000.00 kHz - 10,000 MHz - 10,000 Mc CALIBRATOR HC6U
US $6.99
CB or Ham Radio Crystal Holder 904 - 11.9000 MHZ - 11900 KC NDK
CB or Ham Radio Crystal Holder 904 - 11.9000 MHZ - 11900 KC NDK
US $3.98
 CB or Ham Radio Crystal Holder 988 - 13.5025 MHZ 13502.5 KC CH4CT (2942)
CB or Ham Radio Crystal Holder 988 - 13.5025 MHZ 13502.5 KC CH4CT (2942)
US $4.00
 CB or Ham Radio Crystal Holder 905 - 8.0102 MHZ - 8010.2 KC ALAN
CB or Ham Radio Crystal Holder 905 - 8.0102 MHZ - 8010.2 KC ALAN
US $3.98
 CB or Ham Radio Crystal Holder 1358 - 23.6900 MHZ 23690 KC ALAN
CB or Ham Radio Crystal Holder 1358 - 23.6900 MHZ 23690 KC ALAN
US $3.98
10 LOT - HIGH IMPEDANCE crystal & transistor radio earphones - electronics parts
10 LOT - HIGH IMPEDANCE crystal & transistor radio earphones - electronics parts
US $49.99
 2 crystal or transistor radio receiver earphone parts or repair Hi-Impedance
2 crystal or transistor radio receiver earphone parts or repair Hi-Impedance
US $12.00
 Crystal Microphone element - radio audio electronic kit science project design
Crystal Microphone element - radio audio electronic kit science project design
US $8.00
 CRYSTAL radio set EARPHONE electronic project kit design repair and replacement
CRYSTAL radio set EARPHONE electronic project kit design repair and replacement
US $7.00
PLUG END - earphone crystal & transistor radio receiver set element repair part
PLUG END - earphone crystal & transistor radio receiver set element repair part
US $8.00
 CB or Ham Radio Crystal Holder 1084 - 27.1050 MHZ - 27105 KC HC-6/U .093 Pin
CB or Ham Radio Crystal Holder 1084 - 27.1050 MHZ - 27105 KC HC-6/U .093 Pin
US $4.00
 MIDLAND MODEL 13-509 220 MHZ AMATEUR RADIO FM TRANSCEIVER USES CRYSTALS
MIDLAND MODEL 13-509 220 MHZ AMATEUR RADIO FM TRANSCEIVER USES CRYSTALS
US $80.00
 LOT OF VINTAGE RADIO PARTS FOR HAM REGEN OR CRYSTAL RADIOS
LOT OF VINTAGE RADIO PARTS FOR HAM REGEN OR CRYSTAL RADIOS
US $25.95
HEADPHONES FOR CRYSTAL/REGEN HAM RADIO 600 OHMS IMPEDANCE
HEADPHONES FOR CRYSTAL/REGEN HAM RADIO 600 OHMS IMPEDANCE
US $7.49
 Experimental Crystal Radio Receivers - Hoe to Build Book
Experimental Crystal Radio Receivers - Hoe to Build Book
US $4.99
 Crystal Oscillator Module for R390A Radio Receiver
Crystal Oscillator Module for R390A Radio Receiver
US $20.00
 INRAD International Radio #94 2.1 kHz 8 pole crystal filter 8.8 mHz IF Kenwood
INRAD International Radio #94 2.1 kHz 8 pole crystal filter 8.8 mHz IF Kenwood
US $110.00
Pole Zero Crystal Filter 39.2-50.2 Mhz RF HAM Radio
Pole Zero Crystal Filter 39.2-50.2 Mhz RF HAM Radio
US $30.00
 CB RADIO 11,1125 MHz HC49U CRYSTAL UNIDEN COBRA AND OTHERS
CB RADIO 11,1125 MHz HC49U CRYSTAL UNIDEN COBRA AND OTHERS
US $7.99
 HAM RADIO 160 M BAND HC6U CRYSTALS 8 PCS YAESU KENWODD ICOM DRAKE FREE SHIP
HAM RADIO 160 M BAND HC6U CRYSTALS 8 PCS YAESU KENWODD ICOM DRAKE FREE SHIP
US $16.99
 CB or Ham Radio Crystal Holder 443 - 33.1150 MHZ 33115 KC CH-13R G15L
CB or Ham Radio Crystal Holder 443 - 33.1150 MHZ 33115 KC CH-13R G15L
US $3.98
CB or Ham Radio Crystal Holder 444 - 7.8933 MHZ 7893.3 KC ALAN
CB or Ham Radio Crystal Holder 444 - 7.8933 MHZ 7893.3 KC ALAN
US $3.98
 CB or Ham Radio Crystal Holder 445 - 8.1329 MHZ 8135.29 KC CR1A/AR CZX
CB or Ham Radio Crystal Holder 445 - 8.1329 MHZ 8135.29 KC CR1A/AR CZX
US $3.98
 CB or Ham Radio Crystal Holder 446 - 8.16235 MHZ 8162.35 KC CR-1A/AR
CB or Ham Radio Crystal Holder 446 - 8.16235 MHZ 8162.35 KC CR-1A/AR
US $3.98
 CB or Ham Radio Crystal 1316 - 26.9650 MHZ 26965 KC PR Z-9 (3107)
CB or Ham Radio Crystal 1316 - 26.9650 MHZ 26965 KC PR Z-9 (3107)
US $3.98
CB or Ham Radio Crystal Holder 2301 - 27.1650 MHZ 27165 KC CH-17T Bomar
CB or Ham Radio Crystal Holder 2301 - 27.1650 MHZ 27165 KC CH-17T Bomar
US $3.98
 CB or Ham Radio Crystal Holder 2302 - 16.5150 MHZ 16515 KC TENNXTAL
CB or Ham Radio Crystal Holder 2302 - 16.5150 MHZ 16515 KC TENNXTAL
US $3.98
 CB or Ham Radio Crystal - 124 - 32.9750 MHZ - 32975 KC - HC-6/U .093 Pins
CB or Ham Radio Crystal - 124 - 32.9750 MHZ - 32975 KC - HC-6/U .093 Pins
US $4.00
 CB or Ham Radio Crystal - 1313 - 31.7200 MHZ - 31720 KC HC-25/U .039 Pins (3109)
CB or Ham Radio Crystal - 1313 - 31.7200 MHZ - 31720 KC HC-25/U .039 Pins (3109)
US $4.00
CB or Ham Radio Crystal Holder 2290 - 28.6380 MHZ - 28638 KC Northern (2508)
CB or Ham Radio Crystal Holder 2290 - 28.6380 MHZ - 28638 KC Northern (2508)
US $3.98
 CB or Ham Radio Crystal Holder 1310 - 33.8600 MHZ 33860 KC CH-18R XL32M (3110)
CB or Ham Radio Crystal Holder 1310 - 33.8600 MHZ 33860 KC CH-18R XL32M (3110)
US $3.98
 CB or Ham Radio Crystal Holder 676 - 7.8958 MHZ 7895.8 KC TENN (2943)
CB or Ham Radio Crystal Holder 676 - 7.8958 MHZ 7895.8 KC TENN (2943)
US $3.98
 CB or Ham Radio Crystal - 125 - 27.0250 MHZ - 27025 KC - HC-25/U .039 Pins
CB or Ham Radio Crystal - 125 - 27.0250 MHZ - 27025 KC - HC-25/U .039 Pins
US $4.00
CB or Ham Radio Crystal Holder 2304 - 8.0775 MHZ 8077.5 KC Intcrystal
CB or Ham Radio Crystal Holder 2304 - 8.0775 MHZ 8077.5 KC Intcrystal
US $3.98
 CB or Ham Radio Crystal Holder 1140 - 14.9800 MHZ 14980 KC
CB or Ham Radio Crystal Holder 1140 - 14.9800 MHZ 14980 KC
US $3.98
 CB or Ham Radio Crystal Holder 748 - 12.2900 MHZ 12290 KC ALAN
CB or Ham Radio Crystal Holder 748 - 12.2900 MHZ 12290 KC ALAN
US $3.98
 CB or Ham Radio Crystal Holder 2013 - 11.2750 MHZ 11275 KC TEW
CB or Ham Radio Crystal Holder 2013 - 11.2750 MHZ 11275 KC TEW
US $3.98
CB or Ham Radio Crystal Holder 2306 - 11.4500 MHZ 11450 KC Alan
CB or Ham Radio Crystal Holder 2306 - 11.4500 MHZ 11450 KC Alan
US $3.98
 CB or Ham Radio Crystal Holder 1595 - 8.83666 MHZ 8836.66 KC CH-1R S15L
CB or Ham Radio Crystal Holder 1595 - 8.83666 MHZ 8836.66 KC CH-1R S15L
US $3.98
 CB or Ham Radio Crystal - 1633 - 28.8750 MHZ - 28875 KC - HC-6/U .050 Pins
CB or Ham Radio Crystal - 1633 - 28.8750 MHZ - 28875 KC - HC-6/U .050 Pins
US $4.00
 CB or Ham Radio Crystal Holder 1383 - 7.8917 MHZ 7891.7 KC CR-6B/U (FT-243 TYPE)
CB or Ham Radio Crystal Holder 1383 - 7.8917 MHZ 7891.7 KC CR-6B/U (FT-243 TYPE)
US $3.98
CB or Ham Radio Crystal Holder 1637 - 11.8500 MHZ 11850 KC N.K.D.
CB or Ham Radio Crystal Holder 1637 - 11.8500 MHZ 11850 KC N.K.D.
US $3.98
 CB or Ham Radio Crystal Holder 775 - 27.1350 MHZ - 27135 KC CH-15T A20W
CB or Ham Radio Crystal Holder 775 - 27.1350 MHZ - 27135 KC CH-15T A20W
US $3.98
 CB or Ham Radio Crystal Holder 1640 - 32.9000 MHZ 32900 KC ALAN
CB or Ham Radio Crystal Holder 1640 - 32.9000 MHZ 32900 KC ALAN
US $3.98
 CB or Ham Radio Crystal Holder 1632 - 11.8050 MHZ - 11805 KC ALAN (2949)
CB or Ham Radio Crystal Holder 1632 - 11.8050 MHZ - 11805 KC ALAN (2949)
US $3.98
CB or Ham Radio Crystal Holder 1085 - 27.1250 MHZ - 27125 KC HC-25/U
CB or Ham Radio Crystal Holder 1085 - 27.1250 MHZ - 27125 KC HC-25/U
US $4.00
 CB or Ham Radio Crystal 1131 - 6.3500 MHZ 6350 KC CR-1A/AR DC-30
CB or Ham Radio Crystal 1131 - 6.3500 MHZ 6350 KC CR-1A/AR DC-30
US $3.98
 Diamond-weave COIL 175/46 LITZ for Crystal Radio Sets
Diamond-weave COIL 175/46 LITZ for Crystal Radio Sets
US $24.50
 CB or Ham Radio Crystal 1385 - 7.8917 MHZ 7891.7 KC CR-6B/U (FT-243 TYPE)
CB or Ham Radio Crystal 1385 - 7.8917 MHZ 7891.7 KC CR-6B/U (FT-243 TYPE)
US $3.98
CB or Ham Radio Crystal Holder 1642 - 8.2065 MHZ 8206.5 KC CR-1A/AR CCSO
CB or Ham Radio Crystal Holder 1642 - 8.2065 MHZ 8206.5 KC CR-1A/AR CCSO
US $3.98
 CB or Ham Radio Crystal Holder 2311 - 12.3000 MHZ 12300 KC UI
CB or Ham Radio Crystal Holder 2311 - 12.3000 MHZ 12300 KC UI
US $3.98
 CB or Ham Radio Crystal Holder 1086 - 26.7200 MHZ - 26720 KC HC-25/U .039 Pins
CB or Ham Radio Crystal Holder 1086 - 26.7200 MHZ - 26720 KC HC-25/U .039 Pins
US $4.00
 CB or Ham Radio Crystal Holder 304 - 7.3785 MHZ 7378.5 KC FUJI
CB or Ham Radio Crystal Holder 304 - 7.3785 MHZ 7378.5 KC FUJI
US $3.98
CB or Ham Radio Crystal 1387 - 7.8917 MHZ 7891.7 KC CR-6B/U (FT-243 TYPE)
CB or Ham Radio Crystal 1387 - 7.8917 MHZ 7891.7 KC CR-6B/U (FT-243 TYPE)
US $3.98
 CB or Ham Radio Crystal Holder 1651 - 28.8750 MHZ 28875 KC R-22 CZX
CB or Ham Radio Crystal Holder 1651 - 28.8750 MHZ 28875 KC R-22 CZX
US $3.98
 CB or Ham Radio Crystal Holder 724 - 23.6600 MHZ 23660 KC MA20W JKF
CB or Ham Radio Crystal Holder 724 - 23.6600 MHZ 23660 KC MA20W JKF
US $3.98
 CB or Ham Radio Crystal Holder 552 - 7.8958 MHZ 7895.8 KC TENN
CB or Ham Radio Crystal Holder 552 - 7.8958 MHZ 7895.8 KC TENN
US $3.98
CB or Ham Radio Crystal Holder 1959 - 21.2100 MHZ 21210 KC TENN
CB or Ham Radio Crystal Holder 1959 - 21.2100 MHZ 21210 KC TENN
US $3.98
 VINTAGE SHURE MICROPHONE 254 CRYSTAL HAM RADIO MICROPHONE
VINTAGE SHURE MICROPHONE 254 CRYSTAL HAM RADIO MICROPHONE
US $14.99
 ( 8 ) Vintage FT-243 Type Radio CRYSTALS
( 8 ) Vintage FT-243 Type Radio CRYSTALS "USED"
US $9.99
 1 CB Radio Crystal Extender Remote Box, 6 XTAL SWITCH
1 CB Radio Crystal Extender Remote Box, 6 XTAL SWITCH
US $4.25
MG-6 Marker Generator crystal calibrator 1MHz 100 kHz shortwave radio #2
MG-6 Marker Generator crystal calibrator 1MHz 100 kHz shortwave radio #2
US $12.95
 MG-6 Marker Generator crystal calibrator 1MHz 100 kHz shortwave radio #5
MG-6 Marker Generator crystal calibrator 1MHz 100 kHz shortwave radio #5
US $12.95
 CB or Ham Radio Crystal Holder 1116 - 8.722353 MHZ 8722.353 KC F-6 INTCRYSTAL
CB or Ham Radio Crystal Holder 1116 - 8.722353 MHZ 8722.353 KC F-6 INTCRYSTAL
US $3.98
 CB or Ham Radio Crystal Holder 1667 - 25.6650 MHZ 25665 KC MIDWEST
CB or Ham Radio Crystal Holder 1667 - 25.6650 MHZ 25665 KC MIDWEST
US $3.98
CB or Ham Radio Crystal Holder 602 - 28.7550 MHZ 28755 KC CZX
CB or Ham Radio Crystal Holder 602 - 28.7550 MHZ 28755 KC CZX
US $3.98
 CB or Ham Radio Crystal Holder 583 - 5.7050 MHZ 5705 KC TENN
CB or Ham Radio Crystal Holder 583 - 5.7050 MHZ 5705 KC TENN
US $3.98
 CB or Ham Radio Crystal Holder 488 - .99993 MHZ 999.93 KC
CB or Ham Radio Crystal Holder 488 - .99993 MHZ 999.93 KC
US $3.98
 CB or Ham Radio Crystal Holder 1008 - 6.2100 MHZ - 6210 KC CR-1A/AR (2951)
CB or Ham Radio Crystal Holder 1008 - 6.2100 MHZ - 6210 KC CR-1A/AR (2951)
US $4.00
CB or Ham Radio Crystal Holder 1673 - 14.9340 MHZ 14934 KC TENN
CB or Ham Radio Crystal Holder 1673 - 14.9340 MHZ 14934 KC TENN
US $3.98
 CB or Ham Radio Crystal Holder 1675 - 3.14528 MHZ 3145.728 KC
CB or Ham Radio Crystal Holder 1675 - 3.14528 MHZ 3145.728 KC
US $3.98
 CB or Ham Radio Crystal Holder 2018 - 13.3435 MHZ 13343.5 KC TENN
CB or Ham Radio Crystal Holder 2018 - 13.3435 MHZ 13343.5 KC TENN
US $3.98
 CB or Ham Radio Crystal Holder 596 - 27.6600 MHZ 27660 KC CH-20R H20W
CB or Ham Radio Crystal Holder 596 - 27.6600 MHZ 27660 KC CH-20R H20W
US $3.98
CB or Ham Radio Crystal Holder 1390 - 23.2300 MHZ 23230 KC TENN
CB or Ham Radio Crystal Holder 1390 - 23.2300 MHZ 23230 KC TENN
US $3.98
 CB or Ham Radio Crystal Holder 2026 - 4.6050 MHZ 4605 KC ALAN
CB or Ham Radio Crystal Holder 2026 - 4.6050 MHZ 4605 KC ALAN
US $3.98
 CB or Ham Radio Crystal Holder 306 - .512 MHZ 512 KC Bliley
CB or Ham Radio Crystal Holder 306 - .512 MHZ 512 KC Bliley
US $3.98
 CB or Ham Radio Crystal Holder 977 - 26.6200 MHZ 26620 KC CH-10BR BSRS HC-6/U
CB or Ham Radio Crystal Holder 977 - 26.6200 MHZ 26620 KC CH-10BR BSRS HC-6/U
US $4.00
vintage RADIO CRYSTALS lot MIXED ham tube XTAL transmitter receiver 99c & NR !
vintage RADIO CRYSTALS lot MIXED ham tube XTAL transmitter receiver 99c & NR !
US $5.00
 CB or Ham Radio Crystal Holder 2027 - 33.1500 MHZ 33150 KC TENN
CB or Ham Radio Crystal Holder 2027 - 33.1500 MHZ 33150 KC TENN
US $3.98
 CB or Ham Radio Crystal - 018 - 27.1050 MHZ - 27105 KC - HC-25/U - .039 Pins
CB or Ham Radio Crystal - 018 - 27.1050 MHZ - 27105 KC - HC-25/U - .039 Pins
US $4.00
 CB or Ham Radio Crystal - 1774 - 26.8900 MHZ - 26890 KC - HC-25/U - .039 Pins
CB or Ham Radio Crystal - 1774 - 26.8900 MHZ - 26890 KC - HC-25/U - .039 Pins
US $4.00

Crystal Radio

Crystal Radio

How to Choose the Right Type of Science Fair Project

Science fair projects can be the most memorable part of your science class, giving you an opportunity to show your abilities and creativity. Sometimes, it is hard just to get started on your science fair project. As a first step, make sure you understand the different types of science fair projects. Take the time to choose the right type of science fair project, so that your time and effort are not wasted doing the wrong things.

There are three different methods you can use for science fair projects: building (or modeling), demonstrating or investigating. When picking among them, there are two things to consider. First, read the science fair rules to find out what type of project is required, and be sure to confirm it with your teacher. Second, if you get to choose which type of project to do, pick the kind you find most interesting.

The Model Building Method

The model building method is the kind of project which, as the name implies, enables you to construct a model, to scale whenever possible, to illustrate a specific scientific principle. This could be as simple as a model of the solar system, or a real working machine. Many of us have seen the model of an erupting volcano in which the chemical reaction between baking soda and vinegar causes realistic looking 'lava' flows down the sides of a 'mountain'. These models can be fun to build and quite spectacular - but they are often more suited to elementary school science fairs because of the relative lack of real 'science' or creativity in most of them. Some students do create unusual or dramatic models, which can be used demonstrate new ideas.

The Demonstration

The demonstration or descriptive method of research is again fairly self-explanatory. You could display your collection of rocks or other items related to a particular topic (like geology), and describe how they are related in your report, speech or on a display board. As an alternative, you could use a visual project display board to describe the research you performed. If you choose this form of project, again you are not attempting new science; rather, you are illustrating and explaining scientific principles already known.

The Scientific Experiment (Investigation)

It is with the third of the possible methods that you can provide what most science fairs for older students are looking for - proper scientific experiments using scientific methods to construct and test a hypothesis and draw conclusions from it. If you are interested in a science career, or would like to move on the regional or national science fair, then you should be looking into this area. And the choice of science fair project topics is limitless. Biology, chemistry and physics projects are common, but if your interest lies elsewhere, consider geology, environment, meteorology, or even sports science. Develop a hypothesis around your interest, and then find a method of testing it. There are many different books and web sites from which you can obtain ideas, but remember, the more individual and unique your project, the better your chances of winning.

Remember, it is important to keep your teacher informed about your progress, and confirm that you know the rules and requirements for your science fair. Then, whatever science projects you undertake, you can enjoy them with confidence!

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