900MHz RF Amplifier based BFG480W

Circuit Diagram:

This is the circuit diagram of 900MHz RF amplifier built based transistor BFG480W manufactured by Philips. The circuit features low noise, good linearity performance and works well for high frequency application.

RF Power Amplifier: Theory, Design and Practice

This is a document that explains the design and development of power RF amplifiers applied in an Amateur Radio station. An amplifier may possibly necessary to build as much as 1500W of RF output power, the legal maximum in the United states.

40M Band RF Preamp with 3 Tuned Filters

This is the schematic diagram of 40M band RF preamp with 3 tuned filters. Above image is an experimenter's 40 Meter band front end for CW. This has a double-tuned filter and a low gain, lower noise RF amplifier. This is a great circuit for isolation of a product detector or mixer in a popcorn receiver.

VE7GC Popcorn RF Preamplifier Circuit

Right here is definitely an simple VE7GC Popcorn RF preamplifier by Dick Pattinson. The circuit utilizes a single tuned circuit at the front end and can connect straight to a mixer or product detector in a simple receiver project. Note how Dick provided adjustable RF gain control for this circuit in his Wee Willy project on this web page. In case you can not get Tak Lee green 10.7 MHz IF coils, most likely any other brand of 10.7 MHz slug tuned IF transformer would do the job.

6M RF Preamp using MPF102

This is the 6M RF preamp circuit, build using MPF102 N-Channel RF Amplifier. It really is pretty much like a 6M two-stage preamp that published in QST during the mid eighties. Doug truly favored the grounded gate FET for narrow band preamps. His published work is replete with good examples of them on just about every band. I assembled that amplifier and consider acquiring about 10 dB gain, that is all that I desired for the 6M direct conversion receiver working with a diode ring detector that I was developing. The fantastic feature of the amplifier is the fact that it integrates a band pass filter and preamp in one.

10M band 27MHz RF Amplifier based VN66AF

This is 10M band 27MHz RF Amplifier which based VN66AF MOSPOWER manufactured by Siliconix. VN66AF is an RF amplifier for 10m band frequency (26-30 MHz).

10W Linear RF Amplifier Circuit

This is the 10W linear RF amplifier circuit whish use 2SC2078 as the main component to power up the input signal. The circuit actually can delivers output signal up to 15W.

This RF amplifier circuit has a wide bandwidth range, from 1.8 MHz through to over 30 MHz. The drive level needed is only about 2 - 5 mW under 14 MHz, increasing to 10 mW at 30 MHz. You can therefore make a good QRP CW rig with nothing more than this PA and a simple crystal oscillator. I can achieve 12 watts out of mine using a 10-turn loop around my Grid Dip Oscillator! I can get over 15 watts from my Marconi signal generator, but above about 12 watts it is being over-driven an may not be very nice to look at on the spectrum analyser. The circuit was designed to be as clean as possible.

VHF RF Preamp 100-175 MHz with MAX2633

This is the diagram of VHF RF Preamp circuit 100-175 MHz with single chip MAX2633. The circuit can be used for the entire VHF broadcast and PMR band (100-175 MHz) which can be easily construct without any special test equipment. The grounded-gate configuration is inherently stable without any neutralization if appropriate PCB layout techniques are employed. The performance of the amplifier is quite good. The noise figure is below 2 dB and the gain is over 13 dB.

Low-Cost Broadband HF Amplifier based MOSFET IRF510

This is the circuit diagram of low-cost broadband HF amplifier build based MOSFET IRF510. The amplifier is built on double-sided PC board and requires no tuning. Another PC board contains the low-pass filters. Power supply needed for this RF amplifier is 28 V DC at 5 A, although the amplifier performs well at 13.8 V DC.

Several of these amplifiers have been built and exhibit similar performance. Al has been using his amplifier on each of the HF bands, logging well over 500 contacts in 18 months. Signal reports indicate a noticeable improvement in readability (about two S units on average) over his 5 W rig. No indications of instability, CW key clicks or distortion on SSB have been reported. To make it easy for you to duplicate this project, PC boards and parts kits are available, all at a cost of about $100!

12W RF Amplifier 88-108 MHz based RD15HVF1

This is the 12W RF amplifier circuit for frequency range of 88MHz to 108MHz (FM broadband). This new FM power amplifier is used the famous MOSFET RD15HVF1. We've chosen the synthesizer N°1 to drive this amplifier circuit. In fact, only 200mW are required to obtain the 12W output power level.

Class E RF Amplifier with 24 MOSFETs

This is the circuit diagram of Class E RF Amplifier which build using total of 24 MOSFETs. This high power RF amplifier covering the 80 and 160 meter amateur radio bands.

The amplifier is constructed in 4 of 6-MOSFET modules and applies IXDD414 digital gate drivers. Every gate driver drives 2 MOSFETs.