micro circuits

Building UHF Antennas - This method of construction can be used on most UHF through \"low\" microwave Yagis, and is especially useful for the 33, 23 and 13 cm bands

Weatherproof UHF and microwave cavity antennas - General circular-waveguide-horn antenna design

Horn antennas - About horn antennas, dimensions for construction of a series of microwave horns

The 4X4 Slimtenna - Development of the Slim Jim antenna for HF

Horn antenna - An overview of the basics of the horn antenna used in RF microwave applications.

Tektronix - Spectrum Analyzers - Delivering confidence to confront the most challenging microwave and RF designs. Spectrum Analyzers by Tektronix

What is HSMM Microwave Radio? - John Champa, K8OCL article on HSMM

Real-World Experience with the Elecraft K3 - K3 review by Rick Tavan N6XI and Ed Muns W0YK Northern California Contest Club

How adapt a PC mic to Yaesu FT 857 897 817  ^updated - How connect a common PC headset with microphone to the Yaesu FY-817, FT-857, FT.897 in italian by I6IBE

Baofeng UV-3R Yahoo Group - This group is for support and discussion of the Baofeng UV-3R micro dual band VHF/UHF radio.

HamShop.nl - Ham Radio online store dealer for Yaesu Kenwood Icom LDG Microham and many more ham radio related brands, based in Holland

Tinitro - Ham radio shop dealer for Microham Optibeam Big Boy Rotators EA4TX products based in Finland

DroidRTTY - DroidRTTY is an Android app to decode and encode Ham Radio RTTY with the build in microphone/speaker or wired to your radio.

mhuxd Priority listing - Use microHam Keyers under Linux Daemon implementing the microHam keyer protocol. Provides virtual serial ports. Supports CW Keyer, DIGI KEYER I/II, micro KEYER I/II, MK2R(+), micro2R.

HF Propagation app for Windows - This program displays solar-terrestrial data for radio waves propagation that is provided by the N0NBH web-service.

Design Guidelines for JFET Audio Preamplifier Circuits - Design Guidelines for JFET Audio Preamplifier Circuits By Mike Martell N1HFX

PC Headset On Yaesu FT-857D - Connect a computer headset with a boom microphone to the Yaesu FT-857D by K1DNR.

QLF Filter - Microprocessor based interface designed receives a signal from a Morse key, processes it, and re-transmits it to the radio. A microprocessor in the circuit is pre-programmed with a proprietary algorithm which makes a number of measurements and adjustments to the less percise human generated code.

A low cost morse Trainer / Keyer - By Prof. T. K. Mani - VU2ITI

PIC Keyer - The PIC Keyer is a full-featured Morse code keyer which has been programmed into a PIC 16F88 Microcontroller by W7GC

M0KGK Keyer - The M0KGK keyer with variable speed and weight controls utilising a low cost PIC microcontroller.

Home Build a CT-69 Microphone adapter - This adapter allows the use of 8 Pin round Yaesu microphones on some Yaesu radios with the 6P6C modular socket by MW0GKX

Dynamic Microphone with Icom Radios - Fitting a Dynamic Microphone to an Icom HF radio and some other radios too!

Yaesu Microphone Pin Outs - Vertex Standard, Yaesu mic pin outs for: FT-90, FT-100D (1990s), FT-2600, FT-3000, FT-7100, FT-8100.

Non-relay instant RF Switching - Coax lines to do the RF switching. The advantages are instant switching, no power wasting DC control circuits.