FM surveillance BuG Transmitter using 2N2222 Nov 7, 2008 … The Circuit shown can transmit voice to exceptionally good range. Tune trimmer to hear the signal to your near radio. Frequency range is …

FM telephone bug Jun 18, 2010 … A simple telephone transmitter circuit that is ideal for transmitting the telephone conversation through small distances.The circuit is very simple …

Mobile Bug Detector using CA3130 Sep 6, 2010 … This handy, pocket-size mobile transmission detector can sense the presence of an activated mobile phone from a distance of one-and-a-half …

Bug Detector Circuit Mobile Bug Detector using CA3130. Monday, September 6th, 2010. This handy, pocket-size mobile transmission detector can sense the presence of an activated …

Telephone Listening Bug with FM Transmitter by A933 Mar 7, 2008 … Here is a simple transmitter that when connected to a phone line, will transmit anything on that line (execpt the dial tone) to any FM radio.

Telephone Listening Bug by A933 Jul 12, 2008 … Here is a simple transmitter that when connected to a phone line, will transmit anything on that line (execpt the dial tone) to any FM radio.

AM Receiver Feb 7, 2011 … This AM receiver is working perfectly without the need of coils or even a variable capacitor. The LF356 is the basic component. …

ZN414-MK484 Portable AM Receiver Apr 9, 2008 … An AM portable radio receiver made from the ZN414 IC. The ZN414 ic has now been replaced by the MK484 which is identical in performance and…..

Simple 27 MHz Receiver Feb 7, 2008 … This is a simple RF receiver mainly for low-distance digital radio receiverapplication. … AM/FM/SW Active Antenna by MPF102 …

6 Transistor Super Regen Receiver by BC548 Dec 19, 2007 … This little super-regenerative receiver is essentially an AM receiver, with “ slope detection” used for FM. By tuning to one side of the …

Simple Field strength meter Here is a handy field strength meter that can be used to check the strength of AM radio signals.The circuit is a very useful for those who assemble radio transmitters(especially in the tuning of the final stage for maximum range)….

Low cost AM radio Here is the circuit diagram of a simple and low cost AM radio. The working of this radio circuit is straight forward. Inductor L1 and capacitor C1 forms the necessary tank circuit. Diode D1 performs the job of de-modulation. Transistor T1 is wired as a preamplifier whose output is further amplified by the IC LM386…

Simple Coil-less AM receiver by LF356 This AM receiver is working perfectly without the need of coils or even a variable capacitor. The LF356 is the basic component. P1 and P2 are the frequency selectors. Use a small telescopic antenna. The stations selectivity is not perfect but is acceptable…..

AM reciever with TDA1072A This reciever uses the TDA1072A which is a complete AM reciever on a chip and it only requires comparitively few peripheral components to complete a high quality AM radio Circuit. Unlike some other AM radio ICs, a minimum number of external tuned inductors are used to preserve ….

ZN414-MK484 Portable AM Receiver An AM portable radio receiver made from the ZN414 IC. The ZN414 ic has now been replaced by the MK484 which is identical in performance and pinout. Designed around the popular ZN414 IC this receiver covers the medium wave band band from approximately 550 to 1600 KHz….

CRYSTAL RADIO Description: Crystal radio requires no power supply to operate because it uses energy from the signals it receives. Performance is – like one should expect – poor. Nevertheless, with a good antenna and proper ground, it shouldn’t be too difficult to tune to a strong AM station…..

AM portable radio receiver by ZN414 IC An AM portable radio receiver made from the ZN414 IC. The ZN414 ic has now been replaced by the MK484 which is identical in performance and pinout. Notes: Designed around the popular ZN414 IC this receiver covers the medium wave band band from approximately 550 to 1600 KHz [...]