"Welcome to Our Amateur Radio Club Web Site"

"THE ANCIENT MODULATORS CLUB"

"Dedicated to the restoration, and preservation of AM Radio"
Club Station Call Sign

KØAMC

Founded on March 25, 2ØØ4, by Paul Allen Schlipp

KØRWU

Club News

  • Pictures of the new Yaesu DX-1X Digital repeater have been uploaded. See repeater system 5 below.
    UPDATE: 05/22/2016: Now in digital only mode.

  • We are doing some minor updates to the website. Please excuse our construction mess if something is broken or out of place.

Club Calendar



About our Club

Our club is known as "The Ancient Modulators Club" or "AMC".
We are also known as "The Ancient Modulators Amateur Radio Club" or "AMARC".

Our club is located in the St. Louis, Missouri area. Most of our club members are from the South West County area, North Jefferson County, and as far out as Troy, MO and South to Potosi, MO.

...about our club name

Not to say we don't have a lot of ancient, old foggy ham radio operators in our club, but our club name was derived from the term "Ancient Modulation", which is ham radio slang, and was often used back in the sixties and seventies, when referring to "Amplitude Modulation" or the "AM" mode of voice radio transmissions.


Our amateur radio club is focused on having fun, and lots of rag chewing, as well as restoring and operating old "AM" tube radios.

One of our "club goals" is to promote more AM activity in our area on six meters, and on other bands. Our new six meter, "AM" repeater, is great place to operate some of the old radio gear from the fifties and sixties. Believe me, this is fun stuff to talk on, and these old radios can be purchased for very little now days. Also, some of these old six meter AM radios make a great restoration project. Of course, most of the modern 6 and 1Ø meter radios will also operate in AM mode with our club systems.


"...our Club's Amateur Radio System Overview"

  • Our club has two towers, with one in High Ridge, MO and one in Barnhart, MO.
  • We have 7 repeaters connected to 5 repeater systems.
  • All of our antennas are vertical.
  • In High Ridge we have the 2 meter repeater, and the 6 meter repeater with UHF repeaters back to back.
  • All of our repeaters are Yaesu VXR-5000, except the new Yaesu DR-1X digital repeater.
  • All are compact repeaters with power supplies and controllers inside.
  • The 2 meter repeater has 100 watts output and goes though a cavity to the antenna.
  • Each of the UHF repeaters has 25 watts output and goes though a cavity to the antenna.
  • The new Yaesu DR-1X digital repeater has 50 watts output and goes though a cavity to the antenna.
  • The 6 meter AM repeater has 150 watts peak-to-peak output.

Please see the towers and repeaters sections for more details and photos of our equipment.


Our Towers

Our High Ridge, MO tower is a Rohn 16Ø foot, self-supporting tower, which is sitting at approximately 98Ø feet above mean sea level, placing the antennas between 1Ø3Ø, and 114Ø feet above Mean sea level. The average terrain for St. Louis is around 6ØØ feet AMSL.
Our Barnhart, MO tower is a Rohn 92 foot, self-supporting tower, which is sitting at approximately 98Ø feet above mean sea level, placing the antennas around 1Ø72 feet above Mean sea level. The average terrain for St. Louis is around 6ØØ feet AMSL.

   Click here to look at the AMARC High Ridge Repeater Tower
   Click here to look at the AMARC Barnhart Repeater Tower

"Information about our High Ridge Tower built in 1983"
"The Tower has many different repeater systems over the years"

Between 1983 and 1989 the 2 meter repeater was not on the tower, at that time we had a GE Master-Pro 6 meter FM receiver on the tower for the "St. Louis Six Meter Club".
It was back to back with our 444.55Ø mhz GE Master-Pro repeater, to link to the 6 meter FM transmitter located in Marilyn Heights, MO on a 16Ø foot tower.

Between 1989 and 1993 the GE Mastro-Pro 6 meter repeater was converted to a 145.25Ø mhz repeater, it was back to back with our 444.55Ø mhz GE Master-Pro repeater and was used by the "The Pilots Radio Club".
In 1993 the Weiss Airport closed and that ended "The Pilots Club".

Between 1993 and 2ØØØ, The tower had a GE Mastro-Pro 145.25Ø mhz repeater, and seperate GE Master-Pro 444.55Ø mhz, 444.75Ø mhz and 444.85Ø mhz repeaters, and was used by KØRWU, and his friends.

In 1995 the 145.250 repeater frequency was given to KBØRFO for his link to Washington, MO.

Between 1995 and 2000, The GE Master-Pro 444.55Ø mhz, and was interface with the GE Mastr-Pro 6 meter, and the GE Master-Pro 1Ø meter remote bases, and the seperate 444.75Ø mhz and 444.85Ø mhz repeaters was used by KØRWU, and his friends.

Between 2ØØØ and 2ØØ6, The tower had a Yaesu FTR-241ØA repeater at 146.925 mhz, and was interface with the GE Mastr-Pro 6 meter, and the GE Master-Pro 1Ø meter remote bases, without the UHF back-to back repeater. Also, seperate GE Master-Pro 444.55Ø mhz and 444.75Ø mhz and 444.85Ø mhz repeaters.

Between 2ØØ6 and 2Ø1Ø, All our newer Vertex VXR-5ØØØ 2 meter and UHF repeaters were installed.

At Present, The HR tower has a Vertex VXR-5ØØØ repeater at 146.925 mhz and back to back to a Vertex VXR-5ØØØ at 444.55Ø mhz.
A RCI-5Ø54DX receiver at 5Ø.4ØØ mhz and interface to Vertex VXR-5ØØØ 444.75Ø mhz repeater.
Vertex VXR-5ØØØ at 444.85Ø mhz repeater connected to a Yaesu FT-857D Multi-Band, Multi-Mode Remote Base.


"Information about our Barnhart Tower built in 2ØØ9"

The AMARC Barnhart Tower was built to support our 6 meter AM transmitter antenna.

Our Barnhart tower has our RCI-5Ø54DX 5Ø.5ØØ AM repeater transmitter with our 6 meter Mirage A1015 160 RF Amplifier.
Along with the Vertex FTL-7011 UHF radio link receiver.

Also, our Vertex VXR-5ØØØ 443.725 repeater, with the Yaesu FT-857D Multi-Band, Multi-Mode Remote Base.


Our Repeaters


Repeater System 1. The Two Meter and UHF Dual Band Repeater System

Our Main AMARC repeater system is also a dual band repeater on Two Meters and UHF. Both repeaters are interfaced together.

Both repeaters transmit FM at 146.925 and 444.55Ø mhz, and both modulate a CTCSS tone encoded at 192.8 hz.

They receive FM at 146.325 and 449.55Ø mhz, and have a decode a CTCSS tone frequency of 192.8 Hz.

With this repeater system you can talk in on either the 2 meter FM repeater, or the UHF FM repeater, and you can copy everything on either repeater outputs.

NOTE: This repeater system is open to all amateur stations.

   Click here to look at the 2 Meter/UHF FM Dual Band Repeater System


Repeater System 2. The Six Meter AM Repeater System

Our Second AMARC repeater system is a 6 Meter AM with and it's back-to-back UHF FM repeater. Both repeaters are interfaced together.

With this repeater system you can talk in on either the 6 meter FM repeater, or the UHF FM repeater, and you can copy everything on either repeater outputs.

The 6 meter AM receiver is a RCI-5Ø54DX transceiver and receives at 5Ø.4ØØ carrier squelch, and the UHF FM repeater receives at 449.75Ø mhz, with a CTCSS decode frequency of 192.8.

The UHF repeater transmits FM at 444.75Ø mhz and has a CTCSS tone encoded at 192.8 hz.

The 6 meter AM transmitter at 5Ø.5ØØ mhz is located in our Barnhart, MO tower in order to prevent de-sens to the 6 meter receiver in High Ridge.

The 6 meter AM transmitter is a RCI-5Ø54DX transceiver, driving a Mirage 15Ø watt RF amplifier, and has 8Ø watts carrier output, and swings to 15Ø watts peak to peak.

With this dual repeater system you can talk in on either the 6 meter AM, or on the UHF FM repeater.

NOTE: This repeater system is open to all amateur stations.

   Click here to look at the High Ridge and Barnhart 6 Meter AM Repeater System


Repeater System 3. The High Ridge UHF Remote Base Repeater System

Our third AMARC repeater system is called a "Remote Base Repeater System", which consists of a UHF repeater, interfaced to a Multi-band, Multi-mode simplex radio.

The UHF FM repeater receives at 449.85Ø mhz with a CTCSS decode frequency of 192.8 hz, and transmits at 444.85Ø mhz with an encode CTCSS tone of 192.8 hz.

This repeater is interfaced to a Yaesu FT-857D radio by remote DTMF commands.

The multi-band radio interface controller is a ICS Linker II DTMF controlled switching system. The FT-857D radio has been programmed to operate on the bands of 2, 6, 1Ø, 12, 17, and 2Ø meters. The out-put on the 6 to 2Ø meters is 1ØØ watts. The 2 meter out-put is 5Ø watts. Club members will receive a list of frequencies and codes and changes.

At this time the remote bands in High Ridge are only 2 Meters and 1Ø Meters because the muli-band antenna is not on the tower. Still working on that project.

NOTE: This AMARC Remote Base repeater system is limited to club members use only, but the UHF repeater system is open to all amateur stations. If you are not a club member, and you hear a member using the remote base, you can feel free to break-in, and use the remote base, as a guest, for bands you are licensed to use.

   Click here to look at the High Ridge Multi-Band Multi-Mode Remote Base Repeater System


Repeater System 4. The Barnhart UHF Remote Base Repeater System

"Identical to the High Ridge Remote Base Repeater System 3, except for the repeater frequency difference"

Our fourth AMARC repeater system is called a "Remote Base Repeater System", which consists of a UHF repeater, interfaced to a Multi-band, Multi-mode simplex radio.

This UHF FM repeater receives at 448.725 mhz with a CTCSS decode frequency of 192.8 hz, and transmits at 443.725 mhz with an encode CTCSS tone of 192.8 hz.

This repeater is interfaced to the Yaesu FT-857D radio by remote touch-tone commands.

The multi-band radio interface is done with a ICS Linker II DTMF controlled switching system. The FT-857D radio has been programmed to operate on the bands of 2, 6, 1Ø, 12, 17, and 2Ø meters. The out-put on the 6 to 2Ø meters is 1ØØ watts. The 2 meter out-put is 5Ø watts. Club members will receive a list of frequencies and codes, and changes.

NOTE: This AMARC Remote Base repeater system is limited to club members use only, but the UHF repeater system is open to all amateur stations. If you are not a club member, and you hear a member using the remote base, you can feel free to break-in, and use the remote base, as a guest, for bands you are licensed to use.

   Click here to look at the Barnhart Multi-Band Multi-Mode Remote Base Repeater System


Repeater System 5. The High Ridge UHF Digital Repeater System

This repeater was installed on 07/30/2015. The UHF FM and digtal repeater receives at 449.85Ø mhz with a CTCSS decode frequency of 141.3 hz, and transmits at 444.85Ø mhz with an encode CTCSS tone of 141.3 hz.

   Click here to look at the High Ridge UHF FM and Digital Repeater System Construction


"Please click on the following links for more club related information"

   Click here to look at the old High Ridge equipment attempts

   Click here to look at the Barnhart equipment attempts

   Download our AMARC Net Dates and Repeater Frequencies Flier

   Letters from repeater users

   Links to friends and club member's web sites


 Our club's e-mail address:   kØamc@qsl.net


73, and Please come back for another visit soon!


Our club web site server is courtesy of Scott Neader, KA9FOX of QSL.Net