50 ohm attenuator

3 element 50 Mhz Yagi - A 3 elements long yagi antenna for 6 meters band by ON6MU

A Hairpin match for 5 el. Tonna - How to improve the gain of your 5 element Tonna yagi for 50 MHz by roughly 3 db! by PA2HJS

High impedance baluns - Introduction with some background on balun types

Measuring Cable Loss - Improving measurement accuracy when low-power analyzers are used.

W4JOH Cobra Antenna - The original Cobra antenna, is a multiband 160 or 80 to 10 meter, designed by W4JOH is built using standard insulated wire of about 14 gauge and fed with 450 ohm ladder line down to the shack into a tuner.

Getting the most from your tuner - Here is how to adjust this popular tuner circuit so it transfers maximum power to your antenna without going snap

S50E Danilo Brelih site - S50e, radio klub cerkno

Amateur Radio Lighthouse Society - Founded in 2000 by Jim Weidner, K2JXW, a licensed ham operator for over 50 years, the ARLHS is the only society of its kind devoted to Maritime Communications, Ham Radio, Lighthouses, and Lightships.

HB9DHG QSL gallery - Fully seachable and ordered QSL cards gallery includes front and back of thousands of QSL cards received by HB9DHG

W9BPT Palisades ARC - This club originated in the mid 1950’s with a small break in the late 50’s early 60’s and a rebirth in the middle to late 60’s.

Mortality statistics in Ham Radio Community - To search for potentially carcinogenic effects of electromagnetic field exposures, the author conducted a population-based study of mortality in US amateur radio operators

Calvert County, MD Police and Fire - CalvertNews.info provides news and information for Calvert County, MD. Powered by the Calvert Independent.

Setting up a live broadcast on the internet

LEMO Connectors - Lemo offers over 50,000 circular connectors for a variety of industries including medical, military, and test and measurement.

TS-850S Amplifier Interface - An interface for amplifier to TS-850S

HeliCoil - Inductance calculation for single layer, air-wounded coils and helixes up to about 800 MHz. Inductance calculations accuracy is around 1%. Also, coils with maximum Q for given inductance, resonant RF chokes, PI and T resistive attenuators calculations are provided. Skin effects, radiation losses and other minor side effects are not accounted in maksimum Q factor coils calculations. Program assumes using copper (Cu) enameled or silver (Ag) plated wire. Program is writen bilingual in English and Serbian by YU1AW

VHFCtest4Win - VHFCtest4Win is software for contest logging QSO's on VHF bands (50MHz and up). It is build for all windows versions from Windows 95 and up. by S52AA

PalmProp - PalmProp is a software for PalmOs dedicated to the forcast of HF radiowave propagation by f5hla

SCAN505 - A simple freeware scanner program for the Kachina DSP505. The software does NOT control the radio thru the interface port - it works in conjuction with the Kachina control software using the file interface

G3YXM 500 W PA - 40-80-160 meter band linear amplifier

LA7MI 40W RF Amplifier for 80m - 40W Linear Power amplifier with FETs for 80m Some notes about saturation in ferrite- and iron-cores. Written by LA7MI Stein Torp, N-5005 Bergen

50 MHz GS35b Power Amplifier - OZ1DPR six meter power amplifier using the russian VHF triode GS35b

A low cost dummy load - This article describes a low-cost, low-to-moderate power dummy load, which presents a 50-Ohm resistive load from HF through 440MHz.

Cheap and simple HF dummy load - This is the report of a MFJ-259B analysis of two 100 ohm / 5 watts resistors in parallel partially in italian

Kenwood TS-950 page - Lot's of info on 950sdx tranceiver by Jeff King ZL4AI/DU7