The Mini-Kits EME221-23CM is a High Performance RX/TX masthead Pre-amplifier, and is specifically designed for the 23cm 1240-1300MHz 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 23cm band, and also to suit the receiver gain. The design incorporates VOX RF sensed changeover Relays for Trasnsceivers up to 25 Watts CW without using sequencing, or can handle up to 50 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 ceramic high pass filter on the output provides rejection of signals below 1000MHz.
THIS KIT IS NOT FOR BEGINNERS AND REQUIRES VERY EXPERIENCED SOLDERING SKILLS
The Product picture shows a completed EME221-23CM KIT product with Optional TNC connectors. N type connectors cannot be fitted as they are not available or manufactured in R/A PCB mounts. For more information on cables and connectors that can be used, see the EME221 Kit webpage.
This product is ideal for use with the Icom Multimode UHF transceivers including the IC-910, IC9100, IC-1275, and IC9700 that have a PREAMP switch to supply +12vdc out of the antenna connector on RX mode. Transceivers without this function will require an external bias tee like the Mini-Kits EME168-70-23 to supply DC power up the coaxial cable. Refer to the application block diagram and the EME221 Kit Webpage for more information.
EME221-23CM KIT: is a Basic Kit that includes the PC board, Instructions, and all on board components. No connectors or enclosure are included. Requires Complete construction.
Skill Level: These Kits are designed for very advanced constructors with skills to fit SMD components. Don't Buy the Kit unless you have the skills to construct it.
Enclosure Options: The Optional GME Masthead enclosure is internally coated with MG Super Shield Nickel paint.
Connector Options: It is highly recommended that TNC03 connectors are used if you are using the GME Mashead enclosure.
| Specifications | |
|---|---|
| Frequency Range: | 1130 to 1430MHz ( BW 300MHz @ 1dB ) |
| Band Rejection: | Typically >68dB @ 145MHz, >47dB @ 435MHz |
| Gain Adjustable: | Typically +22dB Max @ 1290MHz Adjustable |
| Noise Figure: | 1.5dB ( Typically <1.2dB @ 1290MHz ) |
| Through Loss: | 0.8dB ( Typically <0.6dB @ 1290MHz ) Bypass Mode |
| RF Power Handling: | 25W CW ( Un-Sequenced ) 50W PEP ( Sequenced ) |
| Minimum RF Input: | +30dBm ( 1Watt ) To activate the RF sensing circuit |
| Operating Voltage: | +11 to 15vdc ( +12vdc @ 200mA Recommended ) |
| Board Size: | 80mm L x 84mm W x 17mm H ( with TNC connectors ) |
| Kit Webpage: | For actual product Tests see the EME221 Kit Webpage |
For a built product for Australia and New Zealand Only see the Product webpage
Built Products are not available for Export to other countries
For more information please see the EME221 KIT WEBPAGE
23cm 1240-1300MHz UHF RX/TX Preamplifier Kit
- Brand: Mini-Kits
- Product Code: EME221-23CM KIT
- Quantity In Stock: 4
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$118.50
- Export: $107.73
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