Minikits EME157B2, Manual

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PARTS LIST
RESISTORS
1 x 39R 1/4 Watt MF Resistor
1 x 47R 1/4 Watt MF Resistor
3 x 150R 1/4 Watt MF Resistor
1 x 22k 1/4 Watt MF Resistor ( R1 Select )
1 x 47k 1/4 Watt MF Resistor
2 x 100k 1/4 Watt MF Resistor
1 x 680k 1/4 Watt MF Resistor
CAPACITORS
7 x 1nF Monolithic Capacitor 5mm X7R 100v
2 x 0.1uF Monolithic Capacitor 5mm X7R 100v
3 x 10uF ELC10GA35 Electrolytic 2mm Capacitor
2 x 2-10pF Trimmer Capacitor ( Yellow 144MHz )
SEMICONDUCTORS
1 x 1N4148 Diode ( Orange Black band )
6 x 1N5711 High Speed Diode ( Blue Black band )
1 x 78L08 Regulator 100mA TO92
1 x BC547 NPN Transistor TO92
1 x 2N7000 FET General Purpose
1 x BF998R Dual Gate MesFET
1 x PC Board EME180 ( to suit BF998R )
MISCELLANEOUS
1 x PC Board EME157B Set of 2 Boards
1 x Instructions EME157B6
1 x 0.7mm TCW 10cm Length ( BNC Connectors )
1 x 0.9mm TCW 35cm Length ( L2 )
1 x 0.3mm ECW 1.0 Metre Length, ( 30cm L1, 15cm L3 )
1 x 0.4mm ECW 40cm Length ( L4 )
1 x T37-0 Toroid ( Tan Colour For L1 )
1 x T50-6 Toroid ( Yellow Colour For L4 )
1 x BN29-1050 2 Hole Neosid F29 Balun Core L3
2 x Relays JW1FSN-DC12V ( Panasonic )
OPTIONAL
1 x ENCL19 GME Kingray Masthead amplifier Box
2 x BNS01 BNC Bulkhead mount sockets.
FOR PRODUCT SUPPORT
www.minikits.com.au/eme157.htm
2M VHF PRE-AMPLIFIER EME157B2
Rev4
to mainly reduce the gain to a more suitable level of around
16dB which seems to be a good level. This can be changed
to suit your application, but should be a minimum of 3dB to
help protect the pre-amplifier from RF when in TX mode. If
the Transceiver that you are using has an RF attenuator, then
It is recommended that this be turned on to reduce the re-
ceiver gain back to a suitable level when used with the pre-
amplifier. This will help with receiver overload from strong
signals, and give a better gain distribution while still getting the
low noise benefit of the pre-amplifier.
2. If your Transceiver does not have a preamp switch that can
feed DC power out the antenna socket, then the Mini-Kits
EME168 Bias Tee Kit can be used. Please see the webpage.
www.minikits.com.au/eme168.htm
Copyright © Mini-Kits www.minikits.com.au Revised 29/12/2014