K1DEU's Ham Radio Pages

Speech Amp, Modulator for up to 300 Watt AM transmitters by W1ECO & K1DEU for Viking, Valiant, Ranger, DX-100, Apache, ETC. 150% modulation W/ Negative Feedback drawn + published by W1CKI Electric Radio Nov 1995, # 79

Using Audio Reactor De Coupling Chokes with modulation transformers (Modified Heising Modulation ) Three Times more Power

Unique, Double Pi Net Output Tank Designs to cure Plate Choke resonance problems

Setting up SSB transceivers for AM transmission

Surge Suppressors to protect your power transformers, etc.

A 70 Volt line to Voice Coil transformer, backwards is a excellent way to couple a Solid State Speech Amplifier to your Tetrode 6146, 807, or 1625 or Triode 811A - 3-500Z modulator grids A Hammond 32 Watter 60 Through 250 Watter

Measuring Audio Phase Shift in Audio Amps or Modulators with a Oscilloscope and audio tone generator by W1ECO

Simple modification for any Carrier Control transmitter with one or two 6146's 21 January 1993

Complex modification for any Carrier Control transmitter with one or two 6146's November 1993

Preamp/Equalizer, for your Microphone Mike Pre-Amp with Bass and Treble boost by W1ECO & K1DEU drawn by K1DEU

Heath Kit SB-220 Linear Amplifier; adding 160 Meters

The ( so called ) 3 diode negative peak limiter by Steve, WA1QIX for Plate modulated Transmitters

Modern, Class E & F Transmitter design Links WA1QIX Class E Site N1GTU Class E BBS Cal Tech Class E, F + H info

Transceivers

Improving your transmit audio To sound beautiful you have to start with the Mike, etc. not the rig

Yaesu FT-1000 MP Page with Setup, Mods and Repairs

Modulate the Yaesu FT-1000MP , and almost any SSB transceiver IC Balanced Modulator Directly

K0TO 's Temperature Stabilized Time Base REF oscillator Mods very inexpensive and stable

Elecraft implements a "low current" TCXO using a thermistor for their K2 PDF 213 Kb

Links

QRZ AM Fone NET WA1QIX Class E Site My Home Page

Copyright Notice: Commercial use of the material contained in this site, all schematic diagrams, circuits, designs and related materials is prohibited without express, written consent of the author. Amateurs may use this material at will for their own use, and are encouraged to do so :-)

Important Safety Notice! Like all high power radio transmitters and RF amplifiers, the RF amplifiers, modulators and power supplies described in this document use hazardous voltages. YOU OR SOMEONE ELSE CAN BE KILLED or badly injured if you or someone else comes into contact with any of these hazardous voltages. The power supplies may contain lethal stored voltages even when turned off or disconnected. You cannot be too careful! In addition, All primary (120V and 240V AC line) inputs must be properly fused at the point where the AC line (s) enter the unit. Never operate a piece of equipment which is not correctly fused. To do so creates a fire hazard, the potential for an explosion and an extreme danger to life and property. Heat build-up can cause a fire hazard. If you're not experienced with high voltage, high power radio frequency equipment, get help from someone who is. Do not build any of the equipment or circuits documented here unless you know what you are doing, and fully understand the proper safety procedures and practices and implement these in your own projects. A little common sense goes a long way :=)

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