hf amplifiers

Half Bobtail Antenna - design by Brian Williams, GW0GHF

A Loft-Yagi for Six Metres - by Brian Williams, GW0GHF

A vertically-polarised VK2ABQ Antenna - design note by Brian Williams, GW0GHF

Omni-Directional antenna for 6-Meters - Experimental omni-directional antennas for 6-meters band

KB1DIG's 2 Meter Antenna Design Gallery  ^pop - Home-brew antenna designs for VHF. 2-meter colinears, 2-meter Halo, and 6-meter Halo

Apartment antennas notes - HF Ham Radio antennas for apartments and methods of shortening antennas

Eurofrequence Dierking NF HF Technik - UFB Hamradio audio filters and more accessories

Leitner Elettronica - RF Amplifiers for HF VHF UHF

NI4L custom dipoles - ni4l resonant dipole custom fan dipole antenna hf

KB6KQ Loop antennas - Horizontally polarized, omnidirectional loop antennas for VHF and 70cm amateur bands

Sweden - FM Repeater - Amateur repeaters in Sweden

FCC - Marine VHF Radio Channels - Summarizes a portion of the FCC rules 47 CFR 80.371(c) and 80.373(f)

U.S. VHF Channels - by USCG navigation center

HF Marine Frequencies - info on marine radio frequencies

Iraq War Frequency Info. - IRAQ War Military HF freqs, Aero HF frequencies and Shortwave Broadcast schedules of interest

Bi-tronic Comunicaciones S.L. - Dealer for CB, HF, VHF, UHF, Kenwood, icom, in spain

Elettronica Turrisi - TRasceivers HF-VHF-UHF, repeaters, GPS, antennas, based in italy

QRO via Russia - Power amplifiers from amateur radio operators around the world which are designed/built using Russian tubes.

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

IK4AUY Sergio - Advanced QRP Low Cost Mosfets HF Linear Amplifier with schematics, IMD, gain data and more. Six articles about amateur radio.

converting Philips FM-828E to 6 metres - conversion of low band VHF Philips FM-828 E band down to 6 metres

converting Philips FM-92 E to 6 metres - conversion of low band VHF Philips FM-92E to 6 metres

converting AWA RT-85 E band to 6 metres - conversion of low band VHF AWA RT-85 transceiver down to 6 metres.

converting AWA 25M-22 to 6 metres - conversion of low band VHF AWA 25M-22 carphone onto 6 metres.

converting AWA 25M-1 to 6 metres - conversion of low band VHF AWA 25M-1 carphone onto 6 metres.