70CM 430MHz AM VIDEO TRANSMITTER KIT

High level Amplitude Modulated video transmitter for the 70cm Amateur band, built on a 71x100mm PC board.  The design uses a sync stretcher & high level modulation to overcome the linearity requirements when transmitting TV signals, & produces up to 100mW, ( +20dBm ) output.  The kit only requires 2 coils to be wound, & uses printed tuned inductors on the PC board for the output amplifier stages so it is easy to tune up.  The complete Kit includes a professional plated PC board, & all onboard components, requires miscellaneous hardware & Crystal to complete.  For Audio add the Audio subcarrier Kit, Order No EME158

A Filter should be used between the EME44B & a RA30H4047M PA Kits to reduce the Double sideband AM Bandwidth. Tuning this filter to the USB of the AM signal will reduce interference to other users of the 70cm band, along with increasing the efficiency of the Power Amplifier. A Helical filter or a suitable interdigital filter, will be required for transmitting on 444.250MHz in all parts of Australia as per the current regulations to reduce the lower sideband.

SPECIFICATIONS:
Frequency Range: 420 to 450MHz ( standard components supplied )
Ouput Power: +20dBm ( 100mW )
Power Supply: +12V @ 140mA
Board Size: 71x 98mm

 

EME44B BASIC KIT

Please Note this Kit uses a small number of surface mount components

Construction Pictures EME44B KIT

Please Note: The Toko Helical Filters Are No Longer Manufactured & We have Sold Out.

Crystals for 426.250MHz are no longer being stocked as the ACMA has indicated that VK Hams will have to vacate 420-430MHz.

Crystals to suit 434.250MHz are now in stock. Crystals to suit 
435.500MHz operation in the US are Available To order.

 

COMPLETE 23CM 1250MHz FM ATV TRANSMITTER KIT

The complete FM ATV transmitter Kit consists of a number of Kits & hardware to produce a high performance FM video & audio transmitter suitable for the 23cm band. The EME154 FM ATV transmitter is frequency locked by a EME161 PLL & controller allowing easy changing of frequency. The PLL software allows for optional band switching so that you can use this complete Kit on the higher Microwave ATV Bands. The Kit comes complete with one EME158 audio subcarrier Kit for either 5.5, 6.0, or 6.5MHz. An additional audio subcarier Kit can be added for stereo sound.

All Kits come complete with PC boards & all onboard components, connector kits, sma plugs & cables as shown. Requires miscellaneous hardware & box to complete.

SPECIFICATIONS:
Tuning Range: 1020 to 1350MHz ( MAX2754EUA )
Ouput Power: +10dBm
Video Pre-emphasis: PAL CCIR 405-1 ( Optional NTSC CCIR 405-1 Kit )
Frequency Steps: 125kHz, 500kHz, 1MHz, 10MHz ( with 4MHz PLL Crystal )
RX/TX Offset:  +/- 0 to 3.2GHz
Bands: Up To 5 inputs with optional rotary switch
Power Supply: +12V @ <300mA with LCD display
Board Sizes: See Kits below

PLEASE REFER TO THE BLOCK DIAGRAM ON HOW ALL THE KITS ARE CONNECTED TOGETHER TO CONSTRUCT THE COMPLETE 23CM 1250MHz FM ATV TRANSMITTER.

This Kit can also be used with the Multiplier Kits on the higher microwave bands.

COMPLETE 23CM FM ATV TX KIT

Click the Picture above for a more detailed view

Please Note all parts including cable,
headers & SMA connectors, LCD module,
& Knob in the above picture are included. A Black/white LCD display module, & the two pushbutton switches not shown are also included.

EME23TX-ATV
KIT WEB PAGE

23CM 1250MHz FM VIDEO TRANSMITTER KIT

The complete transmitter is built on a single PC board measuring 50x65mm.  The Transmitter uses some SMD construction & has an onboard Video Amplifier & Pre-emphasis, & uses an ERA MMIC as a buffer & amplifier to give up to +13dBm output.  The complete Kit includes PC board & all onboard components, requires miscellaneous hardware & box to complete. For Audio add the Audio subcarrier Kit, EME158.  The transmitter incorporates circuitry to allow connection of an external PLL for frequency control.  The PLL Kit with its 40Hz Loop Filter Bandwidth is particularly suitable for FM ATV applications, & can easily be connected to the transmitter.  The transmitter can also be used freerunning as the VCO is stable enough to be used without a PLL. 

SPECIFICATIONS:
Tuning Range: 1020 to 1350MHz ( MAX2754EUA )
RF Output: +13dBm ( 20mW ) maximum
Video Pre-emphasis: PAL CCIR 405-1 ( Optional NTSC CCIR 405-1 Kit )
Power Supply: +12V @ <100mA
Board Size: 49 x 65mm

  EME154 KIT WEB PAGE

EME154 BASIC KIT

Please Note SMA connector is not included.

Use this Kit as a basic FM ATV
exciter to multiply up to the higher Microwave ATV Bands

THIS NEW KIT IS MUCH EASIER TO CONSTRUCT COMPARED TO PREVIOUS DESIGNS.

Use the EME154 Kit as a basic FM ATV exciter for use on the higher microwave bands.

WIDEBAND PHASE LOCKED LOOP KIT

This Kit is a simple 4 channel PLL that has been designed around the SP5055 PLL IC which is popular in Satellite & TV tuners. The IC is a SMD type that has been mounted on the underside of the PC board & is able to work up to 2.8GHz. The Kit has been designed to be used with the EME79/154 Video Transmitter Kits, but can be used with other VCO designs. An ERA MMIC is used as an amplifier to give up to +11dBm output. The complete Kit includes PC board & all onboard components, requires miscellaneous hardware & box to complete.

The software is preprogrammed into a PIC 12F629 Microcontroller that allows up to 4 fixed channels between 1150 & 1300MHz. The software does allow for retuning of the 4 channels to any frequency in this range with the addition of a single externally connected momentary switch.

Please see the software Notes Readme PLL_TX12 as this very basic software does contain bugs.

SPECIFICATIONS:
Frequency Coverage: 1150 to 1300MHz
4 Channels 1250, 1283, 1207.5 ( 2413 ), ( 1219.5 ( 2439 ) MHz
Reference Freq 4.0MHz ( On board Xtal )
RF Input: +8dBm 6mW ( Minimum -15dBm )
RF Output: +10dBm ( 10mW )
Power: 12volts 115mA
Board Size: 49 x 65mm

An optional EME161B Control board Kit is listed below to add to the basic PLL Kit to give full frequency control, RX/TX VFO's, Memories & Band switching.

 

EME161A BASIC KIT

Please Note SMA connectors & Headers are optional.

4 Channels Preprogrammed with standard Australian ATV frequencies for 1.2 & 2.4GHz

CH1 1250MHz, CH2 1283MHz,

CH3 1207.5MHz, CH4 1219.5MHz through an EME139 x2 multiplier Kit produce 2415 & 2439MHz output

EME161A KIT WEB PAGE

SP5055 PLL CONTROL BOARD KIT

This Kit is optional for the EME161A PLL Kit. The control kit can also be used with other products that use the SP5055 & TSA5055 PLL IC's. The Kit adds functionality to the basic EME161A PLL kit adding a EC12E rotary encoder for tuning control, memory channels, separate TX/RX VFO's, frequency offset, & band switching. The control board uses a PIC16F628 Microcontroller & 16x2 LCD display module, to set all functions including menu settings. The display multiplier can be set to use the PLL with RF multipliers for bands up to 24GHz. The complete Kit includes PC board & all onboard components, requires miscellaneous hardware & box to complete.

Two momentary pushbutton switches are used for VFO/Memory & Calibration Menu settings. Momentary Switches, & a 6 position rotary switch are required for all functions, these are not supplied in the basic Kit.

SPECIFICATIONS:
Frequency Coverage: 100MHz to 2.8GHz
Display Multiplier: x1 to x20
Frequency Steps: 125kHz, 500kHz, 1MHz, 10MHz ( SP5055 with 4MHz crystal )
RX/TX Offset:  +/-3.2GHz
Bands: Up To 5
Power: 12volts <10mA ( No LCD Backlight )
Board Size: 40 x 65mm

The Basic EME161B KIT does not include the LCD Display, or any Hardware.

  EME161B KIT WEB PAGE

EME161B BASIC KIT

Please Note The Tuning KNOB1 is Optional

LCD3 DISPLAY

AUDIO SUBCARRIER KIT

The complete Audio/Subcarrier circuitry is built on a single PC board measuring 65x36mm. The circuitry consists of Audio Pre-emphasis, Preamplifier, & a Subcarrier oscillator, & is suitable for either microphone, or line input levels. The circuitry is based on previous designs but now includes a 5.5MHz Band Pass Filter to effectively attenuate harmonics of 5.5MHz providing a cleaner transmitter output. The oscillator is able to supply up to 4volts p-p output, & can be used on most ATV transmitters.  Optional Subcarrier Kits are now available. The complete Kit includes PC board & all onboard components, requires miscellaneous hardware & box to complete.

Board Size: 37x 65mm
Subcarrier Output: Up to 1v P-P Output ( Frequency Modulated )
Audio Input: Microphone or Line Level Input ( 50uS Pre-emphasis )
Power: +11 to 15v DC 35mA

  EME158 KIT WEB PAGE

EME158 BASIC KIT

Use this Kit to add Audio to your
ATV Video Transmitter Kit.

Subcarrier Frequency Recommendations used in VK5

430 / 1250MHz   ( 5.5MHz )
2400MHz ( 6.0MHz )
3300MHz ( 6.5MHz )
5.8GHz ( 6.5MHz )
10GHz ( 6.5MHz )

2.4GHz MULTIPLIER KIT

The Multiplier is suitable for use as an ATV multipler 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 bandpass 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. The Kit requires miscellaneous hardware 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: +12volts 75mA
PC Board Size: 86 x 39mm

Frequency Response & Bandwidth
Output Spurs with +3dBm Input

Construction Pictures EME139 KIT3

EME139 BASIC KIT

Please Note SMA connectors are not included.

3.3 to 3.6GHz MULTIPLIER KIT

The complete Multiplier is built on a single PC board measuring 75 x 35mm. The Multiplier is suitable for use with the EME79/154 Transmitter Kits for constructing an ATV transmitter for 3300MHz.  The frequency range of the stripline filter is from 3310 - 3620MHz @ 3dB. The board could also be used as an amplifier, or filter for construction of 3400MHz equipment. The Multiplier is designed for a +3dBm 2mW input @ 1100MHz for a >10dBm 10mW output @ 3400MHz. The complete Kit includes PC board & all onboard components, requires miscellaneous hardware, (Tinplate strip, SMA connectors) to complete. 

This Multiplier will allow you to use your EME154 Transmitter Kit with the UNIPLL2 Kit on 3300MHz, without the need for expensive prescaler ICs, & high frequency VCOs. 

Specifications: When used as a x3 Multiplier
Freq Range: 3310 to 3620MHz ( 310MHz BW @ 3dB )
Input: 1100 to 1200MHz +3dBm 2mW
Output: > +10dBm ( +12dBm Maximum )
Powersupply: +11 to 12 Volts 100mA
PC Board Size: 75x 35mm

Frequency Response & Bandwidth
Output Spurs with +3dBm Input

Construction Pictures EME101B KIT

EME101 BASIC KIT

Please Note SMA connectors are not included.

5/10GHz MULTIPLIER KITS

There are two multiplier Kits that are suitable for either 5 or 10GHz ATV. Both use the New EME171 Universal Microwave board. Pipe-cap filters have been used for easy tuning & to effectively filter harmonics.

Complete Kits includes professional Plated through hole PC boards, & all onboard components. The Kit requires miscellaneous hardware, ( SMA connectors, cable etc ) to complete.

 

 FOR MORE INFORMATION & PRICING PLEASE SEE KITS PAGE 3

The top side of the board above, shows the pipe-cap filter

900 TO 1300MHz FM AV RECEIVER

Suitable for reception of FM Television signals in the 1200MHz Band, or for using as a I/F Receiver with a higher frequency downconverter.  The receiver uses a Comtech Satellite Tuner module with SMA socket that is very sensitive, & has a 27MHz Bandwidth. The Receiver has up to 4 pre programmed channels in the 900 to 1300MHz frequency range, & uses a stable PLL for minimal temperature drift. Audio is fixed at 5.5MHz, but could be changed to 6 or 6.5MHz with replacement of the ceramic filters. 

A SL1461 Receiver IC is used in the tuner module, along with a SP5055 PLL .  PLL frequency control of the receiver is a replacemant 18 pin SMD PIC Microcontroller programmed & fitted by Mini-Kits. 

The receiver includes a small PCB with PAL de-emphasis circuit fitted by Mini-Kits.

Voltage can be fed into a tuner pin through to the SMA antenna socket to power an external preamplifier, or downconverter. 

Excellent for ATV use especially portable operation.  Just plug in power & AV cable, & select the channel. 

SPECIFICATIONS:
Frequency Coverage: 900 - 1300MHz ( 4 channels Programmed )
Noise Figure: Typically < 3dB ( tests indicate <2dB )
Receiver IF: 480MHz ( 27MHz BW @ 3dB )
FM Demodulater: SL1461 IC ( Mitel )
1vp-p video o/p for 4MHz FM video deviation ( 18MHz BW total )
Receiver PLL: SP5055 IC ( Toshiba )
Local Oscillator: 480MHz higher than the received frequency 
AV Output: Standard video & audio line levels. 
Audio Demodulator:  5.5MHz ( +/-50Khz BW @ 3dB )
Power: 9 to 12volts 300mA 

CLICK HERE To See Inside The Case

Use this Receiver for reception of FM modulated signals in the 1200MHz Band.

Download Data for the Comtech Tuner Module here. Please Note that some information may not be completely accurate.

Standard Frequencies Programmed
1250MHz & 1283MHz( Up to 2 other frequencies can be programmed when ordered from Mini-Kits )

This and all subsequent pages copyright 1999 - 2012 by Mini-Kits    All rights reserved