Broadband RF Preamplifier Active Antenna Booster

 It is not as pretty as the $100.00+ Broadband RF Preamp units but with the addition of the optional ferrite antenna output coil it will work using the same coupling method as some of the more expensive RF Preamps  however the operating frequency will be only about 5Mhz.

These are made by me with my own secret circuit design it has not been copied form another design and I have never seen one like it anywhere.

 A broadband preamp will have a little more noise than a narrow RF band preamplifier. However unlike the over $100.00 Broadband RF Preamplifiers Active Antenna Boosters for a few dollars you can add a tuned input known as a pre tuner and make it narrow band RF preamp as the input is assessable and not molded in a plastic case.  

Frequency response 200Khz  to 25-30Mhz.

Voltage gain is up to 10 to 30 times for AM radio band and about 2 to 5 times for 25Mhz with direct connection inductively by wrapping 3-4 turns of wire around your internal loopstick antenna coil..

The battery only draws about 2ma current. So a 9 Volt battery will last a very long time.

If your location or space limitation prevents you from having a 100ft or longer antenna then this Broadband RF Preamp Active Antenna Booster 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 or AM radio then this RF preamplifier 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 on my crystal radio set. With this RF preamp and a 15ft antenna I get three stations on my crystal set.

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.

Comes with directions to connect with just about any crystal radio or receiver with 50 to 300 Ohm inputs or to any receiver without these inputs with the optional ferrite output coil. All units tested before shipment.

You need a 9 volt battery and wire for the antenna and ground.

If you want a per tuner to make a narrow band AM Broadband RF Preamplifier Active Antenna Booster preamp send me an email and I will tell you the items you need to purchase.

If you have any questions email me before you purchase the RF preamp.

Comes with 1 year warranty just pay postage for return to repair I will repair and send back to you. 30 day no questions asked money back guarantee but would appreciate a reason so I may make improvements on future models. Just return the Broadband RF Preamplifier Active Antenna Booster to me and full refund will be given. However you will have to pay return postage.

   Part # RFamp RF Preamp for crystal and AM radios $39.95

Part# RFamp-wall The above amplifier with Wall Transformer instead of 9 volt battery. $47.95

Optional Ferrite Output Coil for the RF preamp $6.95 . This is not used as as antenna but as a coupling means. Do not purchase the Ferrite Rod thinking it will do something by its self. If you can not or do not have access to the tuning coil in your set then you may need this option. This is not one of my standard Ferrite antenna coils it is special made as a coupling means.

No picture yet but a ferrite rod with 2 wires coming from it.

Part# FC-Output  Ferrite Antenna Output Coupling Coil. $6.95

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contact me at slowe15@cinci.rr.com

Line Card: 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 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