J3250 40-250 WATT POWER AMPLIFIER (for translators or low-power FM stations)

DESCRIPTION

    The J3250 has been type accepted for use under FCC Rules and Regulations parts 73 and 74. This new, broadband, linear, 250 Watt amplifier has been designed specifically for FM Translator use as per the 1991 part 74 rule changes. However, under part 73, this unit could be used as a driver or final for a low power FM station, or as part of a low power standby equipment package.
    Temperature and reflected power values are continuously monitored to assure they conform to adjustable, preset limits. When these limits are exceeded, an externally accessible reference point is reduced to near ground potential via two diode or-gates. When the amplifier is used with one of Tepco's J-317 FM Translators, an out-of-limits temperature condition will cause the translator to mute for the duration of the problem. The circuit will automatically reset if conditions return to normal. A high VSWR condition with cause the translator to reduce power. Specific Information on this circuit can be supplied to those wishing to interface this amplifier to other drive units.
    Power supply is included as a separate unit. The Tepco power supply uses a rugged power transformer. This provides isolation from the line and helps protect the unit from voltage spikes due to lightning or other sources. The power supply switching regulator is used in a "boost" configuration. This means that if the regulator does fail, the input voltage to the regulator will be automatically routed to the output allowing the amplifier to continue operating at reduced power (approximately 200 Watts) until repairs can be made.
    The J3250 has proven to be a very rugged amplifier in the field and failures are rare.

SPECIFICATIONS:

RF Drive Requirements (for 250W out)	10 Watts Maximum (7 Watts typical)
RF Power Output	40-250 watts
Frequency Broadband	88-108 MHz
Dual Metering: RF DC	RF Forward/Reflected DC Voltage/Current
Harmonics and Spurious Products	Better than -80dB
FCC Type Accepted	Under Parts 73 and 74
AC Requirements (for 250 Watts output)	115 VAC, 5 Amps (other voltages available)
Impedance	50 Ohms In and Out nominal
Input VSWR	2:1 Maximum
RF Connector Type	Female 50 Ohm "N"
Weight	Power Supply 33 lbs, Amplifier 19 lbs
Dimensions	Power Supply: 17.5" X 9.5" X 7" Amplifier: 19" X 11.5" X 7" (rack mountable)

For more information, e-mail us at tepco@rapidnet.com.

Tepco Corporation 2603 S. Hwy 79 P0 Box 1160 Rapid City, SD 57709 Phone: 605-343-7200 FAX: 605-343-7240 Back Home