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RF Amplifier
If your location or space limitation prevents you from having a 100ft or longer antenna then this amplifier will allow you to use a 15ft or so antenna.
If you live in a rural area and need a long antenna to receive AM stations on your crystal radio then this amplifier is for you .I live about 20 miles from the nearest AM station and even with a 15ft antenna I can barley get one station. With this amplifier and a 15ft antenna I get three stations.
Many people put audio amplifiers on there crystal radio sets. However it takes about .1 volt for the diode to conduct so stations not able to produce at least .1 volt from antenna do not pass into the audio amplifier so hundreds of times audio amplification times nothing equals nothing.
After looking at 100's of data sheets I found my secret high gain high frequency transistor. The gain is close to darlington transistor. Comes with directions to connect with just about any crystal radio. All units tested before shipment.
You need a 9 volt battery and wire for the antenna and ground.
On orders under 50.00 Buy This Extra Shipping and Handling charge for
none USA residents 3.00
OPTIONAL Insurance and
Delivery Conformation for USA ONLY. 3.00 Buy Here
Buy Insurance and Extra Shipping one time per order not each Item.
Part # RFamp RF Amplifier for crystal radios
24.95
contact me at computercontrolled@earthlink.net
Line card 1N34(A) 1N34A 1N60 1N270 1N277 1N3819 1N914 3N211 3SK88 40673 741 LM741 UA741 7805 7805A 8086 8088 BAT46 BF960 BF961 BF981 BF998 Ceramic ( Crystal ) Earphone Ferrite Loopstick Antenna Coil LM1458 1458 UA1458 LM324 324 LM386 LM555CN 555 LM555 LM555C MAR6 MAR-6 MFE201 MK484 MPF102 MVAM108 MVAM109 NE602 NE602A NE602AN SA602 SA602A SA602AN PN2222A PN2907A 2N4401 2N4403 2N3904 2N3906 2N2222 2N2222A MPF102 2N3819 KSP10 MPSH10 2SC2570 2SC2570A 2SC2498 Variable Capacitors