hf amplifiers

HF Copper Loop  ^pop - A small transmitting loop antenna for 14MHz and 21MHz. This is an antenna you might consider if you have limited space, by Lloyd Butler VK5BR Based on material originally published in Amateur Radio, 11 1991

6dB colinear VHF antenna  ^pop - Building details of a VHF colinear antenna with 6 db gain

Cbdomain.com - A web page for uhf & hf cb operators & scanner hobbtists

HB0 - DXpdition 2004 - HB0 on most HF bands from 12 Sept 2004 to 19 Sept. 2004. HB0/ON7TQ and HB0/ON6UQ Qsl via home call Buro or direct.

Whitton Amateur Radio Group - If you find yourself in London then please do visit. The club operates a HF station with the call sign GX0MIN, Friday evenings. We have held the contest call sign M2W since 2000, and regularly participate in HF contests. CQWW SSB is a favourite and the group has operated the October event from Whitton using M2W and from DX locations during the years, with the calls 9H0WW, ZC4DX, C56DX, A45ZN.

Twin City FM Club - Largest general-purpose ham radio club in Twin Cities. Three repeaters, fully equipped two position HF club station, contesting, field day, and more.

PA3FVB - Description of my mobile HF/VHF station

KEPS Equipments for AO40 downlink - Complete receive system, downconverters, dishes, feeds and preamplifiers for AO40 satellite users

WD7S Productions - A collection of kits for control and protection of homebrew linear amplifiers

Empower RF Systems - We offer a large selection of standard and custom High Power RF and Microwave amplifiers for broadband, general communication, matched band, and personal communication markets.

WaveNode Precision Station Monitoring - The WaveNode WN-1 is a precision, full-featured Amateur Radio Station Monitoring System which now includes Audio Announcing for RF power, SWR, and DC monitoring using HF and UHF remote sensors.

DOMINO - new MFSK mode - A new MFSK mode with IFK by ZL1BPU and ZL2AFP.It is a simple Amateur Radio mode for keyboard QSOs. domino provides digital chat-mode operation on the HF bands, using the well respected sound card technique. Domino will handle TX/RX offsets and mistuning of 200Hz with ease, and will provide perfect copy of drifting signals up to 200Hz/minute!

VHF UHF SHF Toplist - VHF UHF SHF Toplist including DXCC and EME-Initials

NAVTEX - The NAVTEX system is used for the automatic broadcast of localised Maritime Safety Information (MSI) using Radio Telex (also known as Narrow Band Direct Printing, or NBDP).

Baofeng UV3R comments - A Review of the Handheld VHF/UHF Transceiver with known problems and cool features

High Frequency - Radio frequencies for HF-GCS, ARINC, MWARA, and military stations

The Quack Shack CB Shop - CB Radio and Ham Radio outlet. Accessories, amplifiers, mounting brackets, power supplies, GMRS, FRS, scanners, microphones,and more

Azimuth - The AZIMUTH program plots a world map in either azimuth (beam heading) or Mercator projections. If you specify your home location in latitude and longitude, the azimuth projection is centred on your location. The Azimuth map program can display Maidenhead grids - this is useful for 6m, 2m, and UHF DX communication display. Various features of the map are: Azimuth or Mercator projections , Maidenhead grid display, Simple map zooming, Print maps with adequate resolution up to one meter sized map

MultiPSK  ^{updated  pop} - Windows freeware miltimode program by F6CTE that supports BPSK31 QPSK31 PSK63 PSK63F PSK10 PSKFEC31 PSKAM CW CCW THROB 4 bauds THROBX RTTY SITOR-AMTOR-NAVTEX FELD HELL PSK JT65 HELL HF FAX SSTV FILTERS

HamCAP - A freeware HF propagation prediction tool, that interface the VOACAP tool by Alex VE3NEA

Tube Amplifier data and tech info - Source of common model manuals and amateur help on amplifier problems for the amateur bands, Discussion of vacuum tube amplifiers. Technical information and discussion of obselete tube replacement.

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

F6BON Homebrew - Spectrum alalyzer, uhf shf test equipment

W7IUV HF Preamplifier - Schematic and pictures of a W7IUV preamplifier

Tube Amps forum - Discussion of vacuum tube amplifiers. Technical information and discussion of obselete tube replacement