HF Radios

HF Radio Modifications - Lots of HF radio mods, including AOR, Kenwood, Yaesu, Icom, Uniden, Alinco, Sony

KB2LJJ Radio Mods Database - The KB2LJJ radio mods database offers approximately 12,000 Radio Mod's, circuits and manuals.

WideBand for Yaesu 817 857 897 - This software will allow you to extended TX for the Yaesu FT 857 FT 817 FT 897 and reset back to standard factory defaults.

Ham.dmz.ro - Programming software, diagrams, radio mods, secrets, service manuals for Motorola, Yaesu, Kenwood, Icom, Alinco.

Homebrew QRP SSB Transceiver - This page describes a homebrew QRP SSB transceiver built by WB9IPA.

Electronic Service Pros - HAM/Broadcast, Modifications & Repair, D-104 mods, TS-830 TS-530 mods

Scanner and tranceiver mods - Kenwood, Icom, Yaesu, Sony, Uniden Bearcat, Wilson MARK II & IV

Krasnodar - radio schematics - Contain schematic diagram of many different radio, and some operations instructions.

80m SSB & CW transceiver - The 80m SSB & CW transceiver design is based on an already proven concept used in ATLAS amateur transistorised transceivers from 70's

HF transceiver - Continuos coverage HF Transceiver by I6WJB & I6YPK

FT-847 Knowledgebase (FAQ) - Visit the legendary FT-847 FAQ pages ! You'll find a huge knowledgebase especially for the Yaesu FT-847 Transceiver.

5 Watt 40 Meters transmitter - This circuit is unique in that it uses a power mosfet as a final rather than a conventional bipolar transistor.

40 meter QRP Transceiver - This semi-homebrew QRP (low power) CW transceiver is based on the ARK-40 transceiver kit, by S&S Engineering. With its built-in CW keyer and 5 watts of power, the basic ARK-40 transceiver is an outstanding 40 meter CW performer

Kenwood TS830S - Kenwood TS-830 manual, tips and fixes

K1TTT Technical Reference - Technical reference about Accessories, Amplifiers, Antennas, Cable and Connectors, Filters, Geography, Grounding, Gunk, Matching Networks, Projects, Propagation Info Radios, RFI/EMI, Rotors, Station Setup, Towers.

FT-897 mods - FC-30 Fan modification, Mars/Cap mod for Yaesu FT-897, DRM modification for Yaesu FT-897, FT-897 mod for SGC-230 DC power

Direct Conversion HF Transceiver with DDS LO - Direct conversion HF radio with DDS frequency synthesizer is very interesting concept. OH7SV and OH2NLT are experimenting with such rig. Full stories will become available when project matures. Here we have some preview pictures and material.

Electronic Service Pros  ^pop - HAM/Broadcast, Modifications & Repair, D-104 mods, TS-830 TS-530 mods

Ham.dmz.ro  ^pop - Programming software, diagrams, radio mods, secrets, service manuals for Motorola, Yaesu, Kenwood, Icom, Alinco.

HF Radio Modifications  ^pop - Lots of HF radio mods, including AOR, Kenwood, Yaesu, Icom, Uniden, Alinco, Sony

Homebrew QRP SSB Transceiver  ^pop - This page describes a homebrew QRP SSB transceiver built by WB9IPA.

KB2LJJ Radio Mods Database  ^pop - The KB2LJJ radio mods database offers approximately 12,000 Radio Mod's, circuits and manuals.

WideBand for Yaesu 817 857 897  ^pop - This software will allow you to extended TX for the Yaesu FT 857 FT 817 FT 897 and reset back to standard factory defaults.

40 meter 100 watt Transmitter - 40 meter transmitter by K9GDT

40 meter QRP Transceiver - This semi-homebrew QRP (low power) CW transceiver is based on the ARK-40 transceiver kit, by S&S Engineering. With its built-in CW keyer and 5 watts of power, the basic ARK-40 transceiver is an outstanding 40 meter CW performer

5 Watt 40 Meters transmitter - This circuit is unique in that it uses a power mosfet as a final rather than a conventional bipolar transistor.

6L6 Transmitter - 40 meters band 5 watts transmitter, uses a 6L6 with a 6X5 rectifier and a 0D3 voltage regulator tube on the screen.

80 meters cw transceiver - The home made transceiver covers 3.5 to 3.6 MHz and is CW only by GW4ALG

80m CW QRP transmitter - 80 metre ceramic resonator VXO CW Transmitter by VK1PK

80m SSB & CW transceiver - The 80m SSB & CW transceiver design is based on an already proven concept used in ATLAS amateur transistorised transceivers from 70's

A Homebrew SSB Transceiver for 60 Meters - Description of the design and building of a homebrew phasing-type ssb transceiver for the 60 meter band by Paul Alexander WB9IPA

A low power 3.5MHz ARDF transmitter - This low power transmitter is developed for ARDF exercising purposes but of course can be used as super QRP transmitter either. With 1 or 2 meter wire as antenna and a ARDF receiver with ferrite-rod antenna the range is about 100m but with better antennas and a 'real' receiver the range is probably much larger.

An 80 m SSB Transceiver - A project for 80M SSB rig including a DSB/SSB exciters, RX, TX and a 30 Watt PA

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

CDG2000 by OZ9FW - OZ9FW CDG2000 High-end transceiver homebrew project

CDG2000 Transceiver - This site provides supporting material to the RSGB series of articles on the CDG2000 transceiver

Chatterbox Transmitter and Receiver - 160 meters transmitter and receiver by G3NGD

Circuit Improvements for the TS-430S - by Richard L. Measures, AG6K

Direct Conversion HF Transceiver with DDS LO - Direct conversion HF radio with DDS frequency synthesizer is very interesting concept. OH7SV and OH2NLT are experimenting with such rig. Full stories will become available when project matures. Here we have some preview pictures and material.

DRAKE TR7 Downloads - Circuit diagrams drake tr7, Schaltbilder Drake Tr7, antenna tuners, baluns, and home brew power supplies, dual tone ssb test generator, zweiton ssb test generator, zweiton testgenerator, dual tone test generator by DK4DDS

Fox Tango International - Yaesu FT-101 Users Group purpose and scope is to serve as a sort of benevolent, protective, mutual aid and social club, essentially for the purpose of interchanging information, ideas, experiences and problems. By and for owners of Yaesu amateur radio equipment. Founded in 1972 by Amateur Radio operator Milton Lowens N4ML

Frequency and VFO - How to keep from being out of band

FT-847 Knowledgebase (FAQ) - Visit the legendary FT-847 FAQ pages ! You'll find a huge knowledgebase especially for the Yaesu FT-847 Transceiver.

FT-897 mods - FC-30 Fan modification, Mars/Cap mod for Yaesu FT-897, DRM modification for Yaesu FT-897, FT-897 mod for SGC-230 DC power

Gain receiver performance - Tips for those who wish to gain another level of performance from their receiver

HF Rigs db comparison - XLS file with technical specifications about ham radio transceivers

HF transceiver - Continuos coverage HF Transceiver by I6WJB & I6YPK

Hombrewing an HF Transceiver - This page will describe the construction of a multi band SSB transceiver with all its components Band Pass Filter, Oscillator/Modulator unit, RX/TX Mixer TX Amp I.F. Amplifier AGC VFO Driver amplifier Receive audio amplifier Final amplifier Low pass filter Digital display and VFO stabiliser

Home Brew HF SSB Transceiver - KL7GQ Home Brew HF SSB Transceiver

I0SKK CDG2000 transceiver - CDG2000 is a superb transceiver, mainly designed as a high performance receiver by three G-land OM Colin Horrabin G3SBI; Dave Roberts G8KBB and George Faer G3OGQ.

IC-706 Amp T/R Interface, K6XX - External Amplifier Keying from the IC-706 by Bob Wolbert, K6XX

IC-751 transceiver RAM battery replacement - How to replace the lithium battery in this ICOM radio

Icom 706MKIIG fan mod - Modification of internal fan on receive

Icom 706MKIIG mod of internal fan on rx - Unlike the old Icom 706, the 706 MKIIG HF/VHF/UHF multi-mode ham radio transceiver do not keep its internal blower running all the time in receive mode.

ICOM 746 Temperature Measurements - The ICOM 746-Pro has acquired a history of NEC 1678G (IC-151) MMIC and driver transistor 2SK2975 failures. The failure of IC-151 appears to be a combination of ESD damage from electrostatic charge on the antenna entering IC-151, and perhaps thermal heat.

Icom 756 Pro Page - Includes FAQ, operating aids and notes for digital modes use.

ICOM IC-706MKII Modification - ICOM IC-706MKII out of band Xmit Modification

ICOM IC-746PRO Dead TX - The purpose of this web page is to try to investigate the ICOM IC-746PRO Dead TX problem reported by many radio amateurs through out the world; and unfortunately not properly taken care of by ICOM. If you are the owner of either the ICOM IC-746PRO or the IC-7400 you may already have experienced the Dead TX Issue. If not you may sooner or later.

Icom interface box - interface box for Icom rigs that includes a band output port and a CI-V­to­computer serial interface

Improvements for TS-830S - Circuit Improvements and Maintenance Procedures for the TS-830S

JRC NRD-525 - Tout connaître sur le récepteur JRC NRD-525. All about the JRC NRD-525 receiver. EPROM, RS-232.

K1TTT Technical Reference Priority listing - Technical reference about Accessories, Amplifiers, Antennas, Cable and Connectors, Filters, Geography, Grounding, Gunk, Matching Networks, Projects, Propagation Info Radios, RFI/EMI, Rotors, Station Setup, Towers.

K2 Heat Sink Fan - Kazmo’s Kustom Kreations a cool accessory - aka Outboard Heat Management Project by w4kaz

K6XX Amateur Radio articles - An assortment of Amateur Radio-related technical articles written for the JUG, the newsletter of the Northern California Contest Club. Topics include unique but simple and useful radio modifications and accessories, and rig reviews.

Kenwood Schematics - Kenwood schematics diagrams in high resolution format, includes Kenwood TS-830S , TS-820S and TS-520S

Kenwood TS-520 TS-520S Series Manuals - Downloadable manualsand info for Kenwood TS-520S, Manuals for DG-5, Manuals for AT-200, AT-230 Manuals for VFO-520S

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