Neon Electrodes for Sign Lighting
Through our precise manufacturing techniques, overseen by engineers with a tremendous commitment to quality, Voltarc produces Masonlite MilleniumTM Neon Electrodes – the unrivaled choice for signage professionals worldwide.
At Voltarc we use the best raw materials, including shells deep drawn from the finest-quality, pure soft iron, and nickel plated in a custom-built, dedicated plant. The result is first-rate electrodes without the risk of contamination.
Our lead wires are made of standard nickel wire for corrosion-resistance and flexibility, along extra length of copper-clad Dumet sealed into the pinch to enhance confidence in the metal-to-glass seal, and solid-nickel wire for high purity and low outgassing, attached to the shell for reliability via a welding method pioneered by Masonlite.
Masonlite Millennium™ Neon Electrodes – Bombarding and Pumping Procedure
The following procedure is for 15/50C and 15/50CT electrodes on 15mm or larger diameter coated Sign Tubing. Adjust the procedure for other electrode sizes, smaller diameter tubing, and tubes less than 18″ long.
- Open vacuum valve and evacuate tube to approximately 2 to 3 Torr (2 to 3 mm Hg) pressure. Close vacuum valve.
- Turn on bombarder and bring current to between 150 and 200 mA.
- Continue bombarding until the tube reaches 275° to 300°F (135° to 150°C). Always release bombarder switch prior to opening of main stopcock. Then open vacuum valve. Evacuate tube(s) for 45 to 60 seconds, depending on tube length and configuration.
- Close vacuum valve, refill tube(s) with 2 to 3 Torr
(2 to 3 microns) of dry air.
- Turn on bombarder and raise current to 325 mA;
continue heating until tube reaches 375° to 400°F
(190° to 205°C). Note: for uncoated tubes, heat to
482°F (250°C). At this point reduce pressure to 1 Torr
or slightly less.
- Increase current to 800 mA.
- Bring neon electrode shells to a bright, cherry-red color, (1,652° to 1,832°F (900° to 1,000°C)) while maintaining ½ to 1 Torr pressure. Once all shells are of a uniform color, release the bombarder switch and open the vacuum valve.
- Evacuate the tube(s) to the lowest possible pressure – at least 3 to 5 millitorr (3-5 microns). Continue pumping until you can comfortably handle the tube(s) – about 122 °F (50°C).
- Release accumulated moisture in the tabulation(s) at this time with the aid of a heat gun or hand torch. This prevents transfer of moisture to the finished tube(s) during flushing and/or backfilling of the inert gas(es).
- Backfill the tube(s) to the designated pressure with the desired gas using a positive pressure gauge if possible.
Millennium™ Electrode Type
| Step 2
|12/30C||150 mA||225 mA||450 mA|
|13/30C||2 Torr||2 Torr||1 Torr|
|12/25C||75 mA||125 mA||300 mA|
|13/25C||2 Torr||2 Torr||1 Torr|
|15/30C||150 mA||225 mA||450 mA|
|15/30CT||2 Torr||2 Torr||1 Torr|
|15/50C||200 mA||325 mA||800 mA|
|15/50CT||2 Torr||2 Torr||1 To|
Masonlite MillenniumTM Electrodes
Lead Glass Electrodes: Mica Disc – Ceramic Collar – Premium Steel Shell
|Part #1||Description2||Rating (mA)||Glass Length|
|20274||12/30C-2 1/2||30||2 1/2″|
|20275||12/30CT-2 1/2||30||2 1/2″|
|20282||13/30C-2 1/2||30||2 1/2″|
|20283||13/30CT-2 1/2||30||2 1/2″|
|20285||15/30C-2 3/8||45||2 3/8″|
|20286||15/30CT-2 3/8||45||2 3/8″|
|20288||15/50C-2 3/4||80||2 3/4″|
|20289||15/50CT-2 3/4||80||2 3/4″|