1200MHz TRANSVERTER & REPEATER KITS

The complete High Performance Transverter is built on a 70x95mm double sided plated through hole PCB, & uses a large number of SMD components, Mini-Circuits Mixer, Amplifiers, & Helical Filters to make the design compact & predictable in performance. The Toko helical filters allow the Transverter to be tuned to cover a 25MHz @ 1dB minimum bandwidth between 1250 & 1305MHz. The Transverter has been updated with a low noise GasFET front end for a low noise figure & higher RX gain. The basic Transverter Kit comes complete with all onboard components & requires a EME65 500MHz local Oscillator Kit, Crystal, & the EME66 Transverter Sequencer Kit for the RX/TX switching, & interface of the transverter to a 144MHz transceiver. The Basic Transverter Kit requires miscellaneous hardware & connectors to complete. Please specify what crystal you require for the I/F frequency coverage. The Standard Crystal in stock for this kit is a 96.000MHz HY-Q TS07S 5ppm 50deg C.

Specifications:
Frequency Range: Tunable 25MHz 1dB Bandwidth from 1250 – 1305MHz 
Receiver Gain: >24dB Gain, <1.5dB NF  Prototype
I/F: 144 – 148MHz ( 1296 – 1300MHz ) With a 96.000MHz Crystal 
I/F: 145 - 149MHz ( 1296 - 1300MHz ) 95.91667MHz Optional
I/F: 144 - 148MHz ( 1273 - 1277MHz ) 94.0833MHz Optional
I/F: 144 - 148MHz ( 1293 - 1297MHz ) 95.750MHz Optional 
Output Power: 1296MHz +16.5dBm @ 1dB Gain Compression
Input Power: 144MHz 0dBm maximum for +16.5dBm Output
TX Gain: 17.5dB
Power Supply: RX 110mA, TX 185mA
Board Size: 69 x 94mm

Gain & Noise Figure
Output Spurs with 0dBm Input

 

 

Please Note: SMA connectors are not included in the Basic Kit

2400MHz TRANSVERTER KIT

The complete High Performance Transverter is suitable for Satellite operation on 2401MHz, & SSB on 2403MHz. It is constructed on a professionally etched 90x65mm Teflon PC Board, & uses a number of SMD components, Mini-Circuits Mixer & Amplifiers, & a 5 Section Hairpin Filter to make the design compact & predictable in performance. The basic Transverter Kit comes complete with all onboard components, & requires miscellaneous hardware, connectors & box to complete.

The EME94 KIT1 is a Basic Kit only, & requires the option listed below to construct a complete Transverter. The options depend on whether you want it for 2.4GHz receive only, or as a complete Transverter. The recommended options are listed below.

Please Note: This Kit Cannot be modified or used on 2304MHz

Specifications: Freq Range: 2350 – 2450MHz 
Receiver: 24.5dB Gain, <2.6dB NF 
I/F: 144 – 148MHz ( 2400 – 2404MHz ) 94MHz  Standard Crystal  
I/F: 432 - 436MHz ( 2400 - 2404MHz ) 82MHz Optional Crystal
TX Output Power: > +17dBm 50mW 
Power Supply: RX +9V 80mA TX +9v 120mA

 

 

Please Note: SMA connectors are not included in the Basic Kit

EME94 KIT WEB PAGE

Gain & Noise Figure
Output Spurs with -10dBm Input

400 - 500MHz LOCAL OSCILLATOR KITS

This New Kit is a redesign of the popular EME65 Butler Oscillator. Many hours were spend with the help from Kevin ZL1UJG, & input from others to evaluate the EME65 Kit to improve the performance, & update the design. Improvements have been made to lower the power supply & oscillator phase noise, including heatsinking & insulating requirements to suit a temperature controlled heater. Optional components can be fitted to allow for phase locking the oscillator from a GPS PLL reference. The oscillator will provide a stable +7dBm output in the 400 to 600MHz range suitable for Transverters & RX Converters from the UHF to Microwave bands.

The complete Kit includes a Plated through hole PC board, & all onboard components except crystal, connectors etc. The Kit requires a crystal, box & miscellaneous hardware to complete.

Standard & High stability Series 5th Overtone Crystals are listed on the Crystal Page of the Component Catalogue.  Divide your Output frequency by 6 for the required Crystal Frequency.

Specifications: Freq Range: 400-540MHz / 540-600MHz
Output: >+7dBm ( 5mW )
Power Supply : +10 to +15V 35mA
PC Board Size: 69 x 48mm

 

EME175 KIT WEB PAGE

THE OPTIONAL COMPONENT KIT FOR GPS PHASE LOCKING IS NOW AVAILABLE

We still have a few of the older EME65 PC board or Kits available for 400 or 500MHz. Click Here

The new PC board has provision to fit a 50deg Heater next to the crystal on the board.

OSCILLATOR HEATER KIT

The EME177 Kit has been specifically designed to suit the New EME175 Oscillator Kit. It could also possibly be used with the previous EME65 Kit with modification. The Heater is also suitable for stabilizing frequency drift in many other products, including Radio Transceivers & Receivers.

This Kit is suitable for portable Battery operation, & can be set for a temperature between +30 @ +75 degrees C.

The complete Kit includes a Plated through hole PC board, & all onboard components.

Specifications:
Set Point Temperature: Adjustable +30 to +75 degrees C ( with supplied components )
Warm Up Time: mounted to an EME175 Oscillator using a TS07S 50 degree C crystal in an insulated box, within 100Hz @ 576MHz in 10 minutes. Within 10 Hz & 576MHz in 1 Hour. Please Note that this test was made under controlled conditions.
Turn On Power: 50 degrees C, < 300mA ( 25 degrees C Ambient Temperature )
Steady State Power: 50 degrees C, 60mA ( 25 degrees C Ambient Temperature )
Power Supply: Requires a Regulated +8 volt < 300mA ( Uses EME175 +8 volt Regulator )
PC Board Size: 34 x 19mm

 

EME177 KIT WEB PAGE

The top side of the board above, shows the temperature adjustment trimpot & heater transistor.

TRANSVERTER SEQUENCER KIT

This Sequencer has been designed to fully control a Transverter & various other components like, antenna relays, power amplifiers, & preamplifiers etc. High powered stations generally require proper sequencing of the RX to TX, & TX to RX switching so that preamplifiers & relay contacts are not damaged. The Sequencer has 3 delayed TX output switching voltages & has the option of being able to switch 28volt SMA relays. The Sequencer has the option of either RF or voltage switching from a 28-144MHz Transceiver, & can handle up to 3W max input. It is particularly suitable for using with either a FT290R, or a IC202 that have voltage switching on the antenna socket. Output power from the TX I/F can be adjusted down to 0dBm ( 1mW ), with 3Watts input for driving a Transverters mixer direct. The receive I/F signal path has adjustable level to set the maximum gain required for the receive conversion & transceiver used. Requires box & miscellaneous hardware to complete. 

Specifications: 

I/F TX Input:   28MHz - 144MHz Up to 3Watts Maximum Input
TX/RX Delay:   200mS  10uF Capacitor / 10kohm Resistor
Switched Inputs:    (PTT) +12v to TX ( FT290R ),  0v to TX ( IC202 )
RF Sensed RX/TX Switching
Switched Outputs:  Delay1, RX +12v, TX 0v  ( RX Powersupply )
Delay2, RX 0v, TX +12 to 28v  ( Coaxial Antenna Relay )
Delay3, RX 0v, TX +12 to 28v  ( Powersupply to TX Power Amplifier )
Delay4, RX 0v, TX +12v ( TX Stages Powersupply )
Powersupply:   Voltage required +8 to 15v  DC
Current, RX mode 40mA,  TX mode 70mA ( Includes Relay )

 

Complete EME66 Transverter Sequencer Kit

Refer to the 23cm Transverter BLOCK DIAGRAM to see how it is used.

1850 - 2256MHz OSCILLATOR MULTIPLIER KIT

The Multiplier is suitable for use as an ATV multiplier to 2.4GHz, or local oscillator for transverter or receive converters. The multiplier can be used as either a 2X, 3X, or 4X multiplier for output within the 1850 to 2256MHz bandwidth of its 1/2 wave band pass filters.  The Multiplier uses 2 x ERA Amplifiers to produce up to +8dBm output.

The 1/2 Wave Tuned filter design of the EME139 is larger compared to other designs using trimmer capacitors & tuned PC board lines, but it requires no tuning & guarantees a clean local oscillator output with no test equipment required.

The single filter & Spur output is acceptable for most local oscillator applications for use with transverters & Receive Converters. For increased filtering for transmitter use EME139 KIT3 which includes an extra PCB as a second filter, & connect the two boards together back to back.

The EME65, 500MHz oscillator is suitable for driving the Multiplier. The complete Kit includes the PC board, & all onboard components, & 9 volt regulator. The Kit requires miscellaneous hardware,
( Tinplate strip, SMA connectors ) to complete. 

Specifications:

Freq Range: 1960 – 2360MHz +/-3dB
Input: 4x 490 to 590MHz +3 dBm
Alternative Input: 2 x 980 to 1180MHz, 3x 653 to 787MHz +3dBm
Output: +3 to +8dBm Depends on Input frequency
Powersupply: +11-15volts 75mA
PC Board Size: 86 x 39mm

Frequency Response & Bandwidth
Output Spurs with +3dBm Input

Connectors are not supplied with the basic Kit

Construction Pictures EME139 KIT3

137MHz WEATHER SATELLITE KIT

The Receiver has been designed essentially for those that want to experiment with 137MHz Receiver design.  The Receiver is suitable for reception of the NOAA & Meteor APT Satellites on the 135 to 141MHz band.  The receiver is designed around the Motorola MC13135P double conversion superhet receiver IC.  The receiver uses a preamplifier for increased sensitivity & a bandpass filter to effectively reject overload from pagers on 150MHz. The receiver has manual tuning & Automatic Frequency Control for frequency stability, & to track the doppler shift of the Satellite.  A squelch & S meter circuit are incorporated in the design.  The circuit board has been designed for easy connection of an PLL Synthesizer for tuning, & a wideband FM IF demodulator for WEFAX reception on 1691MHz with an external Down converter  The basic EME117 KIT includes the PC Board, all onboard components, & requires miscellaneous hardware, box, Speaker, & connectors etc to complete. 

Requires a PC with Sound blaster or similar sound card. 

For Free Software & Weather Satellite Links Click Here

With retuning, this Receiver is also suitable for reception of the 150MHz Narrow Cast FM services in Australia.

Specifications: 
Freq Range: 135-141MHz 
Input Sensitivity: 0.25uV for 12dB SINAD   ( -120dBm )
I/F: 1st 10.7MHz 230Khz BW, 2nd IF 455Khz 30Khz BW @ 6dB 
Frequency Tuning:  Varicap tuned VCO with AFC
Audio Output:  Speaker up to 500mW 8 to 32 ohms. 
PC audio output:   Filtered Low Pass for connection to a 
computers sound card. 
PC Board Size: 96 x 80mm

 

 

Basic EME117 Kit. Connectors are not supplied with the basic Kit

THIS PICTURE WAS RECEIVED FROM NOAA 17 ON 10/1/03. Some picture quality has been  lost to compress this JPG.

CLICK ON THE IMAGE
FOR A  LARGER PICTURE 

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