q4 type3sk121 transistor

Hombrewing Cubical Quads - Cubical Quad antenna construction notes

Antique Radio Page - The antique radio page is the best place to start if you want to learn about antique radios. this award-winning site features a huge image gallery with hundreds of antique radios (tube, transistor, and crystal sets), useful articles, reviews of out-of-print radio reference books, and the amazing arp directory where you can search and find antique radios on the web!

Old Radios - Dedicated to the collection and preservation of old radios, both tube and transistor.

Barlow Wadley XCR-30 Home Page - A site all devoted to the first full coverage HF transistorized portable set of the world.

Tom's Radio Collection - Tube and transistor radio collection

The transistor radio directory - Transistor and its history and lot of related infos

Tom's Antique Radio Repair - Specializing in antique, vintage and tube radio repair, all makes. Transistor radio repair- from the 50's to the present. Free estimates.

CB DXPacific Propagation Priority listing - Eleven meter world-wide propagation predictions for South Pacific updated monthly. Also, Near Real-Time DX Monitor

43AX101 Ben Priority listing - Home page of 43AX101- Ben. Practical informative site for 11-meter operators DX-ing the South Pacific, DIY antennas,propagation & monitor updated daily.

IQ4T Contest Team - "IQ4T is a special call operated by Radio-Amateurs members of the ""TESSELLO CONTEST TEAM"""

ICOM 746 Temperature Measurements - The ICOM 746-Pro has acquired a history of NEC 1678G (IC-151) MMIC and driver transistor 2SK2975 failures. The failure of IC-151 appears to be a combination of ESD damage from electrostatic charge on the antenna entering IC-151, and perhaps thermal heat.

Electronix Express - Online shop for all electronics needs. Cables, Buzzers all kind of electronic components capacitors, inductors, relays, resistors crystals transformers, hardware like knobs screws nuts and washers, opto electronics, diodes and transistors, soldering desoldering products, test equipmemt and tools

All American - Distributor of electronic components, ull range of semiconductors (active components), including relays, circuit breakers, transistors, diodes, memory devices, microprocessors, microcontrollers, and other integrated cuircuits, as well as passive components, such as capacitors, resistors, inductors, and electromechanical products, including cable, switches, connectors, filters, and sockets.

The Electronic Hoard - A discount component supplier. Transistors, Diodes and various SMT components are available.

2 Element beam designer - This is a DOS program that will design a 2 element beam for a given frequency. The gain is about 6db's the front to back ratio is about 10 db's. The SWR will be about 1.8 to 1, so for transistor rigs a tuner is needed The only information required is the freq in MHZ..

10 W Linear Amplifier - This article describes a 10 watt linear amplifier that is capable of delivering over 15 watts into 50 ohms and uses cheap plastic transistors that are used in CB equipment. by Harry Lythall - SM0VPO

HF QRP Lin Ampl - HF QRP Linear Amplifier with 2x 2SC2166 + 2x 2SC1969 Push Pull Transistors (13.8V)

2 m. Band VHF PA 5 Watts - A VHF power amplifier made with two cheap RF transistors, 2N3924 as driver and a BFS22A for final stage, giving an unexpected output power of 7-8 watts maximum

A simple VOX circuit - Here is a 3 transistors 6 diodes circuit that is a Voice Operated Tx PTT control as well as an ANTI VOX circuit to stop mis-operation from Rx noise by G8MNY

NiCad battery charger - A basic nicad battery charger using a single medium power transistor.

Transistor Specifications - Transistor Specifications, ``RF Power Mosfets ¹ HF VHF transistors

80m SSB & CW transceiver - The 80m SSB & CW transceiver design is based on an already proven concept used in ATLAS amateur transistorised transceivers from 70's

5 Watt 40 Meters transmitter - This circuit is unique in that it uses a power mosfet as a final rather than a conventional bipolar transistor.

Radio Shack Special - Here's an amazing one transistor FM radio that has amazing sensitivity, selectivity and great audio output

Safety: RF awarness guidelines - Although Amateur Radio is basically a safe activity, in recent years there has been considerable discussion and concern about the possible hazards of electromagnetic radiation (EMR), including both RF energy and power frequency (50-60 Hz) electromagnetic fields. This section summarizes what is now known and offers safety precautions based on the research to date.