modifications vx 6r

The 7-Hex Driven Vertical Array - The array consists of 7 vertical antennas arranged as 6 verticals in a hexagon shape plus 1 additional vertical in the center of the hexagon

Comparator-based RF switch - This is a concept paper, not a constuction article. There are too many variables to propose a one size fits all design. However, this paper should give you the basic idea how to do it

160 meter receiving loop antenna - N6RK receive only loop antenna

Effects of Very Large Ground Screens - A theoretical and experimental study of the effects of very large ground screens on 20 meter verticals

A 90 foot irrigation tubing vertical - Experimenting with making vertical antennas out of aluminum irrigation tubing.

W6RO Long Beach Ham Radio Club - W6RO, queen mary long beach amateur radio club.

W6RHC GEARS - GEARS was organized on August 13, 1939 by a group of eleven hams from towns throughout the North Sacramento Valley area.

DVX Project - Digital Voice Transceiver Project This Project began to explore the use of the DVSI AMBE 2020 voice compression chip and also the ADF7021 single chip VHF RF Transceiver from Analog Devices.

Build a 136 kHx TX - Two versions of a 350 and 900 W output TX for longwave by G3YXM

Canada : Alberta Repeaters - Table of amateur radio repeaters in Alberta Canada

Heathkit SB-220 - The Heathkit SB-220, two 3-500Z, amplifier made a notable impact in the world of amateur radio when it debuted in 1975. Resources and modifications

YAESU FL-2100Z Amplifier Repairs - The FL-2100Z amplifier referenced in the following images is the 6-Band model covering 10m thru 160m (no WARC bands) and not the 9-Band version that included the WARC bands. Modifications, schematics and manual

Modifications for the Kenwood TS-850 - Another good collection of TS-850 modifications

Two Kenwood TS850 modifications - Here are two simple modifications / repairs for the Kenwood TS850 HF transceiver, dual receiver mod, and battery pack replacement

FT-1000 S meter - MS Word document with FT-1000 S meter characteristics

Modifications for the Yaesu FT-847 - Some interesting mods for the 847

W9JFL Shack - John talk about Yaesu VX-3 as an interesting upgrade from VX-2, other reviews cover Kenwood TH-D7 TH-6A Icom-91A Kenwood TM-D700A Yaesu FT-817 and Icom IC-7000

SvxLink - Echo Link client for Linux and general purpose voice services system for ham radio use. The svxlink server consists of a core that handles the connection to the tranceiver. The core can be configured to act as a repeater controller or to operate on a simplex channel

Modifications to the Ameritron AL-1200 Amplifier - This page describes two modifications W8WWV made to his AL-1200 amplifier. The mods were obtained from Ameritron, so they are official.

AM-6154 FAA Amplifier circuit conversion - AM-6154 222MHz grid Conversion Information by N0UK

AM6155 / 64 modifications - KF0M's mods for the AM6155 AM6154 RF amplifier

FT-726 AUDIO Modifications - Throughput improvement for the FT726R - Tapr PSK modem

Diplexer design notes - Standard diplexer design is based on singly-terminated Butterworth filters.

NorCal 20 Modifications - by Larry East, W1HUE June 1999

Repeaters: radio modification page - Modifications for motorola and ericsson radio repeater