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Field Strength Monitor / Meters
Last Updated on:
Tuesday, July 28, 2015 03:47 AM


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A Field Strength Indicator-Analog only -  The circuit is powerd by a single 1.5volt AA cell. The current drain is so small, about 60 microamps, I didn't bother with an on-off switch -I just slip a battery in for the day, and hope I remember to remove it when I'm done. The supply voltage can be increased up to the breakdown voltage of the transistors to increase the sensitivity, but beware - the sensitivty to thermal drift will increase as well. . . .  [From Dick Cappels' project pages]

AN677: Designing a Base Station Coil for the HCS410 -  Application Note Published 7-Aug-98. . .  [Microchip]

Field Strength Indicator-Analog only -  The circuit is powerd by a single 1.5volt AA cell. The current drain is so small, about 60 microamps, I didn't bother with an on-off switch -I just slip a battery in for the day, and hope I remember to remove it when I'm done. The supply voltage can be increased up to the breakdown voltage of the transistors to increase the sensitivity, but beware - the sensitivty to thermal drift will increase as well. . . .  [From Dick Cappels' project pages]
Field Strength Meter -  This is a wide band signal strength meter circuit which responds to small changes in RF energy, designed to be used for the VHF spectrum and will respond to AM or FM modulation or just a plain carrier wave. . . .  [Andy Collison's circuit]

Field Strength Meter for 2.4 Ghz Wireless LAN -  What can you use to test how effective your antennas are for 2. 4 Ghz? Which antenna has the best gain or, how do you know that there is any 2. 4Ghz RF transmitted? Here are the details on how to build a general purpose 2. 4Ghz Radio Frequency Field Strength Meter. This one was built using the microwave rated diode from a MICROTEK solid state microwave leakage detector. . .  [Circuit designed by John Samnin]

Field Strength Meter for 2.4 Ghz Wireless LAN -  The original diode in the Microwave detector has been hard to find. I have found a supplier for the diodes. Purchased here: http://www. xs4all. nl/~barendh/Cateng/Cateng_diode. htm Site Main Page :. . .  [John Samin]

Field strength meter for the 137 kHz band -  . . .  

Field Strength Meter MkI -  This Field Strength Meter has been specially designed for our FM bugs. It is capable of detecting very low power transmitters and will assist enormously in peaking many of our FM transmitters that have a coil in the output stage that can be adjusted for optimum output (. . .  [email Colin Mitchell: talking AT tpg.com.au]

Field Strength Meter MkII -  This Field Strength Meter has been specially designed for our FM bugs. It is capable of detecting very low power transmitters and will assist enormously in peaking many of our FM transmitters that have a coil in the output stage that can be adjusted for optimum output. . .  [Collin Mitchell's web site]

Field-strength meter -  I saw this circuit in an old issue of "73 Radio Electronics". I built it, but it didn't work well, so I changed a few components to get better sensitivity. . . .  [copy of geocities.com/tomzi.geo page]

FSM Field Strength Meter -  This is a wide band signal strength meter circuit which responds to small changes in RF energy, designed to be used for the VHF spectrum and will respond to AM or FM modulation or just a plain carrier wave. . .  [Andy Collison]

RF field strength meter -  Most transmitter has several variable capacitors which are used to match impedance for transistors and antennas. I know people hate trimmers and so did I. The reason is that it is difficult to trim a system if you can't measure the performances. . . .  [maxit91 AT hotmail.com]

RF field strength meter Mk1 -  . . .  [Collin Mitchell's web site]

RF field strength meter Mk2 75MHz to 140MHz -  . . .  [Collin Mitchell's web site]

Simple Field Strength Meter -  This Field Strength Meter is simple and also quite sensitive. It uses an ordinary digital voltmeter to measure RF signal strength up to a few hundred MHz. . . .  [Designed by Andy Collison]

Field Strength Monitor / Meters
Last Updated on:
Tuesday, July 28, 2015 03:47 AM


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