BROADBAND MULTI-OCTAVE HIGH POWER AMPLIFIER

Posted on Feb 5, 2014

A MOSFET solid state kilowatt amplifierplifier using MOSFET`s. Helge`s work was followed by articles that appeared in QEX and QST by Joel F. Paladino, N6AMG. Since then, very little has been written in amateur radio publications concerning MOSFET`s in kilowatt applications. Most kilowatt amplifier designs published, use vacuum tubes. These amplifiers tend to be bulky and

BROADBAND MULTI-OCTAVE HIGH POWER AMPLIFIER

Click here to download the full size of the above Circuit.

heavy. In this article, I hope to renew interest in high power solid state RF devices. My primary objectives are to revisit the designs, investigate the use of newer devices, and offer a creative implementation of these devices in an amateur radio amplifier. Please keep in mind, this amplifier design is a work in progress. Previously, I contemplated building an amplifier using vacuum tubes. My requirement was for an amplifier in the 1000 Watt class for HF and six meters. In addition, I needed a power device that would handle this requirement. The device that came to mind was a Eimac 8877. I researched a design that would cover HF through Six meters. Every design was either for HF or Six meters, but not for both. In addition, they involved tube technology which I had not worked with in the past. The designs also looked a bit more mechanically complex than I had expected. My idea was to aim for a design that was both portable and straight forward to implement. After weighing the pros and cons, it looked like a solid state design was the only viable option left. But which devices should I use Bipolars or MOSFET`s After a lot of reading, it seemed like MOSFET`s would be the device of choice. I decided to build one of the amplifiers designed by Helge Grandberg of Motorola. I had remembered reading of a design in QST, so I decided to go through all my piles of magazines. I finally found the article in the September 1992 issue....

Visit page

Leave Comment

characters left:

Related Circuits

Color sensor

Color sensor. Colour sensor is an interesting project for hobbyists. The cir- cuit can sense eight colours, i.e. blue, green and red (primary colours); magenta, yellow.

Dew sensor

Dew sensor. Dew (condensed moisture) ad- versely affects the normal per- formance of sensitive electronic devices. A low-cost circuit described here can be used to.

Audio Visual Ringer

Audio Visual Ringer. Many a times one needs an extra telephone ringer in an ad-joining room to know if there is an incoming call. For example, if the telephone is installed in.

Multipurpose Circuit for telephone

Multipurpose Circuit for telephone. This add-on device for telephones can be connected in parallel to the telephone instrument. The circuit provides audio-visual indication of on-hook,.

Off line Telephone tester

Off line Telephone tester. Here is a circuit of an off-line telephone tester which does not require any telephone line for testing a telephone instrument. The circuit is so simple that.

Telephone Headgear

Telephone Headgear. Acompact, inexpensive and low component count telecom head- set can be constructed using two readily available transistors and a few other electronic.

Telephone line based audio muting and light on circuit

Telephone line based audio muting and light on circuit. Very often when enjoying music or watching TV at high audio level, we may not be able to hear a telephone ring and thus miss an important...

Telephone Ringer using 556 dual timers

Telephone Ringer using 556 dual timers. Using modulated rectangular waves of different time periods, The circuit presented here produces ringing tones similar to those produced by a telephone. The.

New Circuits

Zero consumption Anti-theft High power Code Switch for E-Bike Batteries

This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
Ultrasonic distance finder circuit

The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Simple Metal detector circuit with CD4030

Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Fully automatic watering circuit for flower pots

Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
Simple deep searching metal detector circuit

The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
Sub-Harmonic Bass Converter for Electric Guitars

The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
Echo Depth Sounding Sonar for Boats

In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
100W HiFi Audio Amplifier Circuit

This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
Plant-Pot Water Level Indicator Circuit

A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....

Create NOW your QR MENU for your Restaurant / Hotel / Bar / Caffe,

Comprehensive ordering/paying features. fully personalized to suit your Business.

Update Anytime! Easy and Simple!

Popular Circuits

high current 10 to 20 amp automatic

This design can be used for charging high current lead acid batteries in the order of 100 to 200...

Audio Power Meter

This simple circuit indicates the amount of power that goes to a loudspeaker. The dual-color LED...

Free-Electron Pump (FEP) Experiments

A simple two-transistor inverter circuit has been built for this experiment. The transformer...

The signal processing circuit

It works semiconductor color sensor can be summarized as follows. The figure shows the spectral...

Intelligent thermostat temperature sensor LM75 circuit diagram consisting

As shown by simple smart temperature sensors based on I2C bus interface configured as shown...