band pass filter

6element 50 MHZ Yagi - Less than 20' long but super gain figure and wideband with flat SWR.

6 meters Delta Loop by KK5ID  ^pop - The 6 Meter Band may be dead at times, but help bring it to life with Larry's rotatable loop project.

2.4G Antenna - Pictures of 2.4 Ghz antennas, JN1GKZ S-band homemade antennas

Quarter Wire to Copper Tube Slim-Jim - K0GKJ project of a copper tube slim jim antenna for two meter band

Dxhunters.com - DX information portal for 11 meters band

27MHz DX-Pagina - Dutch web site dedicated to freebanding on 27 mhz.

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.

4S7OF Ham Radio Pages - Information about 4S7OF operations and ham radio in Sri Lanka

DeltaKilo Yahoo Group - This is a group for CBers, Sidebanders, Amateurs and Freebanders. Items to be discussed are CB, Skip, Skeds, DX communications, SSB, export radios, Radio equipment, mods, ham radio, repairs, electronics, CW, PSK31, RTTY, digital, and different radio shops.

N'BRED - N'BRED: The All Good Ol' Boy Band

Radio Audio and sound files - Some tens of very special audio files recorded during amateur radio activities like aurora traffic, meteor scatter, communications with ISS crew and the sound of various transmission modes that you can hear on HF and VHF bands

Radio Filters.Com - Low Cost FM Notch Filters: Radio Filters.com, manufactures frequency control products including band pass, notch, reject, electronic filters

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.

QRP LABS - The QRPLABS series of single band QRP CW tranceiver kits are high performance CW tranceivers with easy operating features, small size and light weight.

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!

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).

Timewave manuals - Timewave Documents for User Download, PK-900 Multimode Data Controller, PK-232 Multimode Data Controller, DSP-232 Multimode Data Controller, DSP-9 Noise Reduction and Bandpass Filter, Audio Signal Processor and Noise Reduction Filter, Audio Signal Processor and Noise Reduction Filter for Yaesu SP-5 and SP-6 Speakers

UK Radio Frequency Bands - A guide from 0 Hz to 30 MHz The main bands, all frequencies in MHz unless otherwise stated

Shopsolo.com cb radios - Small family run business based at London Heathrow and Poole which covers UK CB radio enthusiast Stock a range of CB radios and CB radio aerials and multiband radios and CB mounts and accessories.

YagiCAD - A freeware software package for Yagi design. This webpage also contains many sample and standard antenna downloads for experimentation.

MultiPSK  ^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

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.

Crystal Radios at crystalradio.org.uk - Shortwave and broadcast band listening using crystal (passive) radio.

2m Band VHF antenna pre-amplifier - Homebrew pre-amp for 144-146 MHz amateur band and OSCAR Satellites, using BF981 Dual-gate MosFet. Gain ~15 dB, NF=1dB.

WD5HOH Regenerative(Regen) Receiver - This web page describes a small, single tuned circuit regenerative receiver primarily for daylight reception in the 16, 19, 22 and 25 meter international shortwave broadcast bands.