Andhra Electronics Limited manufactures high stability, low ageing crystals from 1 MHz to 150 MHz. All crystals are manufactured in a class 1000 clean room environment. Most crystals can be delivered in 7 days.

Model	Weld Type	Frequency Range	Features	Data Sheet
HC-49/U HC-49/T HC-50/U HC-43/U HC-42/U	Resistance Weld Resistance Weld Resistance Weld Cold Weld Cold Weld	1.8432 MHz to 35 MHz (Fund) 20 MHz to 150 MHz (Overtone)	High Stability, less than 2 ppm/year aging. High Stability, less than 1 ppm/year aging.
HC-51/U HC-48/U HC-47/U HC-36/U	Resistance Weld Resistance Weld Cold Weld Cold Weld	1 MHz to 35 MHz (Fund) 20 MHz to 150 MHz (Overtone)	High Stability, less than 2 ppm/year aging. High Stability, less than 1 ppm/year aging.
TO-5	Cold Weld	4 MHz to 80 MHz	High Stability, less than 1 ppm/year aging.
UM-1 UM-1 Slim	Resistance Weld	7.5 MHz to 37 MHz (Fund) 28 MHz to 150 MHz (Overtone)	High Stability, less than 2 ppm/year aging.
UM-5	Resistance Weld	15 MHz to 37 MHz (Fund) 45 MHz to 120 MHz (Overtone)	High Stability, less than 2 ppm/year aging.
Unpackaged	Monitor Crystals	4 MHz to 10 MHz	Chrome / Gold Plating
HC-49/U Gull Wing	Resistance Weld	1.8432 MHz to 35 MHz (Fund) 20 MHz to 150 MHz (Overtone)	2 ppm/year
UM-1 SMD	Resistance Weld	7.5 MHz to 40 MHz (Fund) 30 MHz to 150 MHz (Overtone)	Metal Jacket, 2 ppm/year
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