The Mini-Kits High Performance VHF 1.25m band RX/TX masthead Pre-amplifier has been designed to be easy to construct, and is suitable for the 222-225MHz Amateur Band. The design uses a 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 design incorporates VOX RF sensed changeover Relays for Trasnsceivers up to 100 Watts CW without using sequencing, or can handle up to 500 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 output low pass filter provides high rejection of signals at 50 and 430MHz.
THIS KIT IS NOT FOR BEGINNERS AND REQUIRES VERY EXPERIENCED SOLDERING SKILLS
The Product picture shows a completed EME220-1.25M KIT1 product with Optional BNC connectors
This product is ideal for use with the Icom IC-375 Multimode VHF transceiver and Transverters 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 EME168-2-70 to supply DC power up the coaxial cable. When using a high power RF amplifier up to 500 Watts, additional sequencing will be required to protect the pre-amplifier from damage. The Mini-Kits EME166 Sequencer can be adapted to be used for correct sequence timing of the Rx to TX changeover.
For more information see the EME220 Kit Webpage
EME220-1.25M KIT1 is a Basic Kit that includes the PC board, Instructions, and all on board components. No connectors or enclosure are included. Requires Complete construction.
Connector Options: BNS09C PCB mount connectors are only for the GME Mashead enclosure. BNS01-RF ( BNC Female ) and NS03 ( N Female ) are chassis types and only suit the 1590S Enclosure Kit.
Enclosure Options: The GME Masthead enclosure is internally coated with MG Super Shield Nickel paint. The 1590S enclosure Kit includes a Hammond 1590S diecast enclosure, all nuts and bolts hardware, and 2.1mm DC socket and power cable.
Requires Complete construction. Do Not construct this Kit unless you are very experienced with surface mount construction, and only if you have a quality soldering iron and 60/40 Tin Lead solder.| Specifications | |
|---|---|
| Frequency Range: | 210 to 230MHz ( BW 10MHz @ 1dB ) |
| Band Rejection: | Typically 40dB @ 50MHz, 18dB @ 144MHz, 60dB @ 430MHz |
| Gain Adjustable: | Typically +17dB Max, 8dB Min @ 223MHz |
| Noise Figure: | 0.8dB ( Typically <0.7dB @ 223MHz ) |
| Through Loss: | 0.3dB @ 223MHz ( Bypass Mode ) |
| RF Power Handling: | 100W CW ( Un-Sequenced ) 500W PEP ( Sequenced ) |
| Minimum RF Input: | +20dBm ( 100mW ) To activate the RF sensing circuit |
| Operating Voltage: | +11 to 15vdc ( +12vdc @ 150mA Recommended ) |
| Board Size: | 80mm L x 84mm W x 25mm H ( with BNC connectors ) |
| Kit Webpage: | For actual product Tests see the EME220 Kit Webpage |
For more information please see the EME220 KIT WEBPAGE
1.25m 220MHz VHF RX/TX Preamplifier
- Brand: Mini-Kits
- Product Code: EME220-1.25M KIT
- Quantity In Stock: 2
-
$65.95
- Export: $59.95
Available Options
Related Products
