The 500 KC Experimental Group for Amateur Radio

This web site was updated on 23 July 2005 at 2020 CDT

THE LATEST NEWS

W D 2 X S H

FCC ASSIGNS CALL LETTERS TO ARRL 600 METER EXPERIMENTAL GROUP

(on 22 June 2005)

Saturday, July 23, 2005 - QST - I have had many requests from visitors asking to be put on an email list so they may stay up to date on happenings regarding this project and operation on 600 meters in general.

To accommodate those of you wishing to join a list, Kenneth Gordon, W7EKB/WC2XSR, has offered his 600 Meter reflector for us to use. His list is composed of the members of the original Six-Hundred Meter Research Group (SHMRG) and others who are interested in the future of 600 Meters for possible Amateur Radio use.

To join Ken's SHMRG reflector, simply post a message to:

majordomo@piobaire.mines.uidaho.edu

and write ONLY the words:

subscribe SHMRG

in the BODY of the message.

All the latest information about both Ken's SHMRG project and the ARRL 600 Meter project will be posted on this web site and on Ken's reflector.

Monday, July 18, 2005 - The Experimental Group members are patiently awaiting further word from the FCC regarding the status of the Experimental License Application for WD2XSH. As previously mentioned, this waiting period is completely normal, and is necessary to ensure that no problems to other FCC licensees would be caused by the issuance of the experimental license to the Group.

As soon as any new or updated information about the license application becomes available, it will be posted on this web site.

Reception reports of the transmissions made by Group participants are requested. You do not have to be a member of this group to send us a reception report. Please use the GUESTBOOK link at the left side of this web page to enter your reports or comments about this web site.

More information as it becomes available, so stay tuned - to 600 Meters, of course!

Click HERE to go to the News Archives for earlier news about this project

If you have anything to contribute - news, construction articles, data files, interesting links or whatever - please email w5jgv at w5jgv dot com. Thanks from the 500 KC Experimental Group!

Experimental Station Locations

Operational Specifications

Frequency of Operation - 495 to 510 KHz
Maximum Power Output to Antenna - 100 Watts
Maximum EIRP - 20 Watts
Emission Modes - CW and PSK31
Number of Stations - 23

The following files relating to this project are available for downloading by clicking the following links:

The ARRL 600 Meter License Application as filed with the FCC

Updated License Application - June 6, 2005

A Proposed Typical Vertical Antenna System

Technical and Location Data for Station Locations

A 600-Meter Amateur Band - a proposal by W1FR, Frederick H Raab, Ph.D. (as filed with the FCC)

A 600-Meter Amateur Band - a proposal by W1FR, Frederick H Raab, Ph.D. > > Revision C: September 16, 2004 < <

FILE DOWNLOADS

Spectrum Lab (zipped) with info about VLF reception

Shure Reactance Calculator Slide Rule (1957) [body front] [body back] [slide front] [slide back]

"Low Frequency Antennas" by C. A. Martin and P. S. Carter, RCA Laboratories, Rocky Point, N.Y.

A Substitute for Litz Wire? Stranded wire can work. Read THIS

To Download the Big Coil size calculator chart provided by W5TVW in GIF format, click HERE

To Download the Big Coil L/C/F calculator chart provided by W5TVW in GIF format, click HERE

PROJECT PAGES

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The W5JGV 200 Watt Linear / Digital Amplifier

Picture of the Breadboard setup V 2.02

Picture of the Prototype Amplifier Driver board V 2.05

Parts List and notes Version 2.05 for the 500 KHz 200 Watt Linear / Digital Amplifier

Schematic Version 2.05 of the 500 KHz 200 Watt Linear / Digital Amplifier

50 Ohm Input Attenuator for the 500 KHz 200 Watt Amplifier if you have 10 Watts available

Data file for the IRFP260 MOSFET used in the 200 Watt Amplifier (all versions)

Data file for the TC4426 MOSFET Driver used in amplifier V 2.02 and up

Data file for the LM386 / NTE823 used in amplifier V1.01

Data file for the LM384 / NTE862 used in amplifier V 2.02 and up

Two Proposed 500 KHz Low-Pass Filter designs by W5JGV

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Other Projects

A 166.5 KHz, 400 Watt SSB Linear Amplifier by W5JGV (opens in a new browser window)

Additional information about Amateur Radio and Part 5 Experimental Operation may be found on my other web site at W5JGV.COM

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