Here are the internal components and the case. Note that
unlike some preamps this unit is NOT
RF switched. It MUST
be protected from inadvertent transmitted RF.
Fully assembled, tested, and installed in a metal enclosure with female
BNC connectors on input and output.
Based on the MAR7 device, this receive only preamplifier (no transmit
switching) covers 100 MHz to 500 MHz.
This includes the137 MHz WX, 2M, and 70cm satellite bands.
Operates from +9-15V DC (a fresh 9V battery works great!).
Ready to operate--not a kit! Includes low power (about 5W)
protection diode on the input for accidental transmissions into the
Perfect for portable operations using a dual band hand-held Yagi like
the ARROW, Cheap Yagi, etc.
Just put it inline on the correct receive band for operations in either
mode U/V or V/U. You won't believe what you've been missing!
Full details and schematic can be found in the November/December 2012
AMSAT Journal article by Mark Spencer, WA8SME, or downloaded here:
Broadband VHF/UHF/WX Satellite RX Preamp
preamp is NOT
rf switched. It MUST
be protected from inadvertent transmission RF!
Proceeds from the sale of this item will help fund the AMSAT Fox Family
The equipment was developed as part of the
ARRL Education and Technology Program
AMSAT Store Merchandise is shipped on normal work days, as promptly as possible. However, due to a single person staff and other AMSAT activities, there will occasionally be short delays in handling. International shipping will incur additional transit time.