The Mini-Kits EME237-70CM is a High Performance RX/TX masthead Pre-amplifier, and is specifically designed for the 70cm 430-450MHz Amateur Band. The design uses the Mini-Circuits PGA-103 E-PHEMT amplifier that has a very high dynamic range and ultra low noise figure, and provides superior performance to Mos or GaAs FETs. The gain is adjustable so that the gain distribution can be optimized for coaxial cable loss that can be significant on the 70cm band, and also to suit the receiver gain.  The design incorporates VOX RF sensed changeover Relays for Trasnsceivers up to 50 Watts CW without using sequencing, or can handle up to 100 Watts PEP if sequencing is used.  An on board bias tee ( DC power injector ), allows the pre-amplifier to be antenna mounted and powered via the coaxial cable. A Tuned input T type filter and low pass filter provides high rejection of signals at 144 and 500MHz.

The Product picture shows a completed EME237-70CM-MH product with TNC connectors. N type connectors or adapters cannot be fitted as they are too large for the enclosure.

Refer to the application block diagram and the EME237 product Webpage for more information.