Welcome to JMC's Thermal Design News. The purpose of our newsletter is to update customers about the ongoing projects we are working on. Read ahead to see what's happening at JMC.

Custom Blower Designs

Advancements in processing power dictate a greater need for effective thermal dissipation for electronics systems with high impedance and component density. In computer applications this is most evident, as multiple processors can be designed in close proximity to each other in an enclosed system. For this reason, JMC has developed various custom-built, high-performance blower applications and redundant blower trays to provide superior heat dissipation while overcoming system impedance.

• 80 CFM Free Air
• 5000 RPM
• 48 VDC
• High Speed/ High Pressure
• High Reliability/ Dual Ball Bearing System
• PWM
• Tach Output
• 12 oz-inch Torque, excellent to back pressure
• Customizable Housing and Size

92x38mm DC Fan Now Available

JMC's 92x92x38mm DC fan is available now to customers.

110 CFM 5100 RPM 12 VDC, 0.90 Amps @ max speed Dual Ball Bearing Available with Intellifan technology Available with PWM control

Introducing the 60x25mm Panther Fan - You won't hear it coming!

JMC's new Panther fan is ready to pounce on fan noise - introducing the 60x25mm Panther fan that is so quiet, you can hardly hear it.

In traditional fans, the most dominant acoustic noise is due to the fan’s torque characteristic. The stator excitation is a square wave that is switched on and off by a specific degree value before and after the peak torque position. This excitation causes a small amount of ripple in motor torque, producing an audible noise caused by the lower frequency commutation operation. Each small torque causes a minute flexing of the entire fan structure and results in an audible ticking noise while the fan is operating.

JMC addresses this issue with the Panther fan technology. By operating at a much higher frequency level, the 60x25mm Panther fan produces a soft commutation that results in a quiet operation that is above the audible range for human hearing. This technology can also be utilized in other JMC fan sizes.

• 60x60x25mm
• 13-36 CFM
• 3000-7000 RPM
• 10.0-13.2 Vdc
• Built in variable speed with thermistor
• Thermal shut down circuit
• Tach or locked rotor output signals available
• Preprogrammed basic frequency is 25KHz

Riddle Me This - Enter to Win

Email us your answer to the riddle below by replying to this message. If you are correct, we will enter your name into a monthly drawing for a free JMC polo shirt!
Special Bonus: Win 25,000 AAdvantage miles on American Airlines! Each time you answer one of our riddles, your name will be added to the drawing. If you answer correctly, your name will be entered twice. We will select a winner in November 2003 (terms).

Congratulations to Michael Berktold of Intel, our October shirt winner!
October Riddle: There are 100 buildings along a street. A sign maker is ordered to number the buildings 1 to 100. How many "9's" will he need? Answer: The answer is 20 (9, 19, 29, 39, 49, 59, 69, 79,89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99 = 20 "9"s).

Contact JMC
800-580-6688
info@jmcproducts.com (Corporate Headquarters USA)
asiasales@jmcproducts.com (China)
info@jmceurope.com (Europe)

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