How to Get the Most from Attenuators and Preamps

Most amateur transceivers include a preamp and/or attenuator, accessed either by switches on the front panel or via the radio's software menu
post 23 Dec 2021


Preamplifiers Links

54



The 50MHz Assistant
The preamplifier is the most important part of the whole unit, due to it being a narrowband amplifier it is mandatory in order to avoid receiver front-end overload especially that caused by nearby TV

The SID Seizer is a VLF/LF receiver
The SID Seizer is a VLF/LF receiver project for monitoring Sudden Ionospheric Disturbances, typically caused by solar flares

U301 FET preamplifier
This FET preamplifier has been around for almost 25 years. It is extremely reliable and can handle several watts directly into either the input or the output without failur

Very High IP3 LNA for 144 MHz
After careful inspection of different designs that could be used as the front end amplifier of my new 144/14 MHz transverter design I finally stopped at the Infineon's BF998 MOS FET tetrode

Wideband PreAmp's for HF/VHF/UH
This MMIC is designed for use as a general purpose 50 W gain block. Applications include narrow and broad band IF and RF amplifiers in commercial and industrial applications

Antennas_manufacturers About Rtty mode Audio Recording Amplifiers Antennas Satellite Amateur Television ATV Aprs software Beacon Band Plan Ham Radio Capitals Europe DX cluster software

Italy provices

Italia-call-ham radio Italy provices Ham Radio Clubs Italy
EME Ham Radio Satellite Grid Software Ham shirts Ham radio Magazine Log Converter Software Logs Search Services Meteor scatter Microwave Mac Ham Radio Software Practice with the soldering Propagation Solar Cycle Power Supply PMR 466Mhz Packet Radio TNC
PSK31 software Prefix World Propagation prediction Qrp low power QSL Printing QRSS Amateur VLF operating Radio old Museum Radio portal Surplus radio Sstv Photo SWL Shortwave DX Radio Telegraph Morse code VHF Activit Web SDR

Radio transceiver

Icom 706 Icom 7000 Icom 9700 Icom 7851 Kenwood TS-850 Yaesu FT 817 Yaesu FT 857 Yaesu FT100 Yaesu FT 1000mp
10 m| 12 m| 15 m|
17 m 20 m| 2 m|
23 cm| 30 m| 40 m
6 m| 70 cm| 60 m| 80 m| 160 m| 136 khz| 630 m|
Bazooka
Beverage
Cb Antenna
Collinear
Cobweb
Delta Loop
Eh
End_fed antenna
EWE Antenna
Fan Dipole
Folded Dipole
G5RV
Halo
Helix
Hentenna
Hidden Antenna
Hf mobile
HexBeam
Isotron
Jpole
Loop
Log Periodic
Low Band Receiving
Moxon
Multiband
Morgain
Ocf Fed Dipole
Quad
Slot
Spiral antenna
Vertical
Vhf-Uhf-Shf
Wifi & Ghz
Windom
Wire
Yagi
Ant.Masts and mounts
Ant.Transmatch
Antenna_Analysis
Antenna Receiving
Antennas Shortwave
Antenna Switch
Balun Calculator Antenna
Contest Logging Software
Components-kit
Duplex
Dummy load
Feed Lines
Fiberglass tubing
Phased Array
Projects Homebrew
Software Antenna
Software Defined Radio
Swr Meter System of grounding
Theory Traps Tower
Sstv Software
Logging Software
Digital_Mode
HF_radio_modifications
Interface Radio
Memory_keyers
Microphone setting
PC sound Radio Interface
Pocket Pc Preaplifiers
Radio control
RF attenuator
Radio programming
Radio Transceivers
RF Filter
Spectrum_Analyzer
Tracking satellite
Voice Messages & Keyer