This project consists of a super generative receiver that reaches the frequency range of amateur radios and even aviation frequency.
“Thanks for the wake, @$$%*#!” Unpleasant to imagine, unpleasant to hear, and rude on all sides. We haven’t heard that since leaving the USA and I don’t miss this aspect of many boaters in close proximity plus a dose of …well, of whatever it is that prompts throwing a wake or respond like
This receiver, specially designed for the VHF airband, couples decent performance to simple construction, all at an affordable price. It does not contain exotic parts and may be adjusted without special instruments, so we reckon the design makes an ideal entry-level receiver for aviation enthusiasts with two feet firmly on the ground.Eavesdropping on police, ambulance and fire brigade communications, to mention but a few examples, is a hobby with a persistent attraction to many. This has been the case ever since these services started using unprotected mobile communications. The exact reasons for the ‘addiction’ are hard to pinpoint. Curiosity, of course, but there’s more to it. A possible enticing factor is that scanner listening is somewhere in the twilight zone between ‘illegal’ and ‘allowed’, which no doubt adds to the excitement enjoyed by many scanner enthusiasts.
Pico aprs v4
JPole VHF – IZ0HCC
SV1BSX's Homebrew page
Hentenna VHF – IZ0HCC
Maritime Radio with - Self Study Suggested Prerequisite none Details Course material is available on line 24/7. You will move through the course material at your own pace. You have 60 days to complete the course. Students will have a contact name, phone number and email should they have any questions and to arrange the examination. The Maritime Radio course teaches emergency radio procedures and everyday operating techniques. Le
3D Model of Soviet military portable R-105D VHF radio transceiver. 14644 triangles and 2 sets of PBR textures. Rendered in Marmoset. Don't forget to scroll down to see the model in Marmoset Viewer.
The TRP-10000 Portable Radio Repeater is available in VHF & UHF. It features 25 Watts of output using low current draw of only 150ma. Perfect for solar pow...
Cobra 25-Watt Fix Mount VHF Marine Radio GPS - TSC.ca
4 transistors VHF radio receiver circuit
The circuit is a simple 88-108 MHz VHF FM transmitter circuit. It is basically a VHF Colpitts oscillator capable of transmitting sound or music to any standard FM receiver. The circuit is powered by 9V battery which makes it easily portable. It also has a capacitor microphone which picks up very weak sound signals. The output frequency can be easily adjusted by potentiometer thanks to onboard MV2109 varicap diode and the frequency stability is quite good. The range of this transmitter is 100 meters.
________________________________________________________ VHF (UHF) Ground Plane
_______________________________________________________ Antenna DDRR – Directional Discontinuity Ring Radiator La DDRR è una antenna molto compatta, omnidirezionale a polarizzazione verticale ed il suo guadagno è più o meno quello di una ground plane.
Here's how to use your VHF radio the right way so you can be understood, and get what you need.
Récepteur VHF : Nous vous avions proposé en fin d’année un article concernant la réalisation d’un récepteur Ondes Courtes, je vous propose désormais
VERTICAL DOBLE BANDA PARA 144 y 430 MHz Es muy fácil de diseñar y se puede construir con tubos de cobre para mayor resistencia al viento o aluminio, dando buen resultado. La ganancia de la antena, según reportes dados, es de unos 5 dB de ganancia. A pesar de no ser mucho, hay que tener en cuenta que una antena de la característica de la Ringo, que tiene una ganancia de unos 3 dB. CONSTRUCCIÓN: La varilla inferior es la parte de UHF y es donde se deberá de conectar el vivo del cable coaxial, su longitud es de 49cm, pudiéndose usar tubos de cobre o aluminio finos, la parte superior de 97cm y corresponde a la parte de VHF. LA BOBINA: La bobina esta construida sobre un material aislante (tubo de PVC, resina, fibra de vidrio, etc.), de media pulgada de diámetro y 50 cm de longitud. Se deberá de poner un material aislante y que tenga resistencia al viento. Para realizar la bobina, deberemos tomar una medida de 2m 3cm de alambre de cobre de 1,5 mm de diámetro, dejad 2cm para poder conectar un extremo de la bobina a la varilla de UHF y el otro a la parte de VHF. Lo que hay que tener presente, en el momento de bobinar el alambre, la separación entre espiras debe de ser la misma separación entre ellas o lo mas aproximado posible.
