The following pages are those that I maintain either in whole or in part.  I hold the amateur radio callsign of KA7OEI, hence the common theme of many of the following links:

Misc. VHF/UHF/Microwave/Light:

The KA7OEI 10 GHZ page - A page with some details of 10 GHz amateur radio operations and equipment.

Modifying the Ramsey FR1 for WFM IF use with Gunn Transceivers - This page describes how the Ramsey FR1 is modified to function as a 30 MHz wideband FM (WFM) receiver for use with Gunn Transceivers.

Decreasing Intermod on the Kenwood TM-733A dual-band mobile transceiver - This describes a modification that can greatly reduce the susceptibility of this (otherwise fine) mobile rig to intermodulation response due to strong signals.

Substituting the SRF7043 in the Yaesu FT-100 -  Unfortunately, one of the more trouble-prone components in the Yaesu FT-100 is also one of the most expensive and difficult-to-get:  The VHF/UHF Final Amplifier transistor.  This page provides some details of a usable (but not perfect) replacement device.

Comparison of coherent versus nonconherent light for transmission of audio on an atmospheric path - Did you even wonder if the phase-coherence of Laser light might impede the effective transmission of amplitude-modulated intelligence on an optical communications circuit over an atmospheric path, and whether or not noncoherent light may provide superior performance under similar conditions?  I did, so I decided to check it out...

A product review of a yagi -  This page describes in some detail a yagi that a fellow amateur radio operator bought on Ebay.  It would be true to say that no antenna performs nearly as well as this antenna! 

Direction Finding (e.g. "DFing"):

KA7OEI ARDF page - This page provides a point-of-reference various Amateur Radio Direction Finding topics - particularly for pages relating to the Montreal I, II and III Doppler DF units by VE2EMM - including "alternate" firmware for those units that can provide additional functionality.  There is also information on a simple PIC-based TDOA unit.

LowFER/MedFER:

The "CT" MedFER Beacon - page - a description of a PIC-based PSK31 MedFER (Mediumwave Frequency Experimental Radio) beacon on 1704.9something KHz.

QRSS and You... - This page explains QRSS (extremely slow CW) its advantages, and how to use it to receive weak/distant signals.

Using your computer to ambush unsuspecting NDBs - This page describes a bit about NDBs and their properties and how one may use a computer to aid in their reception.

A Line-Synchronous Noise Blanker for VLF/LF/MF use - This is a noise blanker designed to attenuate noise generated by line-operated devices (light dimmers, etc.)  Special attention has been paid to the design to minimize broadband IMD produced by the blanking action.
 

The KA7OEI FT-817 pages - This collection of pages describes in some detail the inner-workings of the FT-817, as well as various things that can be done to improve the performance of the transceiver.

My participation in the ARRL FMT (Frequency Measurement Test) - A now-annual event that allows participants to test their frequency-measurement techniques and equipment in a real-world way.

The KA7OEI GPS page - This page talks a bit about using an HP3801A GPS receiver as a time/frequency reference.

The NiCd/NiMH page -  This page describes in some detail the care and feeding of NiCd and NiMH cells and batteries.  This explains how to keep NiCd cells going, and what that "memory" effect really is! (Hint:  It's not the "memory" effect at all!)

Clint's Friendship Cruise page - This talks about a public service event where we set up temporary repeaters to cover a large geographical area in some of the most rugged terrain in the U.S.  This page talks specifically about those areas in which I have been directly involved.

The Cycloid Dipole - Developed for use with the WA7X beacon, I derived 2 and 6 meter versions of the "Cycloid Dipole" - an odd-looking antenna that exhibits omnidirectional, circular polarization radiation patterns at the horizon.

Restoring my Atwater Kent Model 20 Compact receiver - This page describes how I restored an old Atwater Kent Model 20-C receiver to operating condition - and how it was used for NDB reception!

Narrow-bandwidth TV IF filter for the Icom R-7000 receiver - If you use an R-7000 receiver for TV DXing (or are intested in TV DXing in general) you might be interested in how narrower-bandwidth signals can help pull out weak TV signals.

The Utah T1 Modem page -  This has a brief description of a T1-rate modem that I built some years ago.  Circuit description, theory of operation, and schematics are available online.  This page also tells you were you can't get kits for this modem...

Other misc. pages maintained (in whole or in part) by me:

modulatedlight.org - This web site has information about through-the-air optical communications using various types of light sources.

The Repeaters of the Utah Amateur Radio Club (UARC) - This page has detailed information about UARC's repeaters, and plans to improve those repeaters.

The Utah VHF Society page -  This describes the purpose of the VHF society, and tells a bit about the repeaters/systems/clubs that are affiliated with it.
 

Miscellaneous miscellany (that is, things that don't fall into the above categories...):

Programming the Pictiva OLED Display -  This has some very basic information on how to "talk" to the Pictiva (tm) OLED (Organic LED) display - but ONLY the Osram OS128064PK16MY0A01 - which is the 128x64 serial version. Please read the disclaimer at the top of the page before you do anything!

The Cybernator -  This is a device that may be useful in the field of speech therapy:  Get this for a person that talks too much, too little, or just likes the sound of his/her own voice!

A Cold-War Mystery - In the early 50's, after an above-ground bomb test, this boat limped into Truk lagoon:  What happened to it?

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The various trademarks and names (e.g. "Icom," "Kenwood," "Osram," "Pictiva", "Atwater Kent," etc.) used on this page are the property of their respective owners and no endorsements are expressed or implied.

This page maintained by Clint, KA7OEI.  Last update:  20080307