KIT HELP

 

The Kit Support section is to assist those that may be having difficulty constructing or making a Kit work. Most Kits are tested regularly to make sure that there are no issues due to faulty batches of components, or PC boards. Older Kits may have had changes by modifications to improve the performance.

Almost all problems with Kits are due to solder joints being bridged, or components being placed onto the PC board in the wrong location. If you cannot get a Kit working, then please first double check these possible problems first.

RF type Kits can have instability issues when mounted inside a box enclosure of a size which may resonate causing RF instability. Most RF Kits include specific documentation on how to best mount the Kit including the RF cabling to connectors.

If you have trouble with your Kit, Mini-Kits can repair it for you, provided that your kit was assembled to a satisfactory standard.  Please Email first before sending any products back for repair. A charge of $33.00 AUD applies, ( Australian Customers Only ) for repairs which will cover minor parts, repairs and return postage.  Overseas customers please Email. If a Kit requires extensive work or replacement of components, then you will be contacted with a quotation for the repair.

 

VK5EME36 1250MHz FM VIDEO TRANSMITTER KIT Updated Saturday 20th October 2012

Discontinued Product No Longer Supported.

 

VK5EME38 AUDIO / 5.5MHz SUBCARRIER KIT Updated Saturday 20th October 2012

Discontinued Product No Longer Supported.

 

EME44 430MHz AM VIDEO TRANSMITTER KIT Updated Friday 19th July 2013

Link to the EME44 Kit webpage

 

 

VK5EME48 2.4GHx VIDEO TRANSMITTER KIT Updated Saturday 20th October 2012

Discontinued Product No longer supported.

 

 

EME65 400/500MHz OSCILLATOR KIT Updated Sunday 21st July 2013

Discontinued Product

Link to the EME65 Kit webpage

 

 

EME66 TRANSVERTER SEQUENCER KIT Updated Monday 7th October 2013

Discontinued Product.

Link to the EME66 Kit webpage

 

 

EME70 / 70B 2100-2450MHz RECEIVE CONVERTER KIT Updated Saturday 20th October 2012

Discontinued Product No longer supported.

Only one Fault has been reported for this Kit. The Converter was able to tune 2415MHz signals but no signals could be received on 2439MHz. The fault was found to be a faulty 10kohm tuning trimpot.

 

 

EME72 / 72B 23CM TRANSVERTER KIT Updated Sunday 21st July 2013

Discontinued Product.

Link to the EME72 Kit webpage

 

 

EME75 AUDIO / SUBCARRIER KIT Updated Tuesday 4th January 2011

1/  A 1Mohm resistor was fitted on the input amplifier to drop the audio level when using a line level input.  This resistor affects the 50uS Pre-emphasis circuit effectively making it inoperative.  It is suggested that the 1Mohm is replaced with a 1Kohm resistor and if the gain needs to be reduced, then change the 270kohm feedback resistor to a smaller value.  A 2k2ohm feedback resistor seems about right for line level input. Alternatively replace the 270kohm with a 500K trimpot to adjust the gain.  Current Kits have now been upgraded.

2/  A simple modification supplied by Steve VK5SFA to reduce 5.5MHz patterning on the picture, is to replace the 1nF ceramic capacitor on the output to a 100 to 150pF. However the 1nF option for increased gain needs to be fitted to get enough subcarrier output.  Current Kits have now been upgraded.

3/  The only fault seen with this Kit was with the LA7051 IC having a short circuit to the top ground plane of the board.  Be careful to leave a slight gap between the IC and the top of the board in construction. 

4/  Modification to use on 6.5MHz and above, change the 47pF NPO capacitor across the 15uH coil to 33pF or lower. A new ceramic filter for the same frequency also needs to be fitted.

5/ Audio distortion can occur with some SFE ceramic filters.  A 560ohm resistor needs to be fitted from the input of the filter to ground.  The problem appears to be lack of impedance matching on the output of the SFE Filter.  Current Kits have now been updated. 

6/  Some Kits have been supplied with 18uH coils instead of 15uH ones.  For 5.5 / 5.74 / 6.0MHz a 27pF capacitor for C1 is used, and For 6.5MHz a 22pF for C1.

Discontinued Product.

Download the complete Kit Notes

 

 

EME76 MITSUBISHI PA KIT Updated Tuesday 24th May 2011

Please note that this Kit has been replaced with the EME176 Series Mitsubishi PA Kits. The two Kits are very similar with some small circuit changes to the replacement Kit.

 

 

EME77 UNIVERSAL PLL KIT Updated Thursday 10th January 2002

Discontinued Product No Longer Supported.

1/ There has now been 4 reports of faulty 100pF capacitors in the 6.4MHz oscillator causing low 3.2MHz output from the 4040 IC. The symptom is that the PLL locks initially when turned on, and then goes out of lock in a second or so. The faulty capacitors are Philips miniplates, grey in colour with a 5mm pin spacing. The new replacements are now brown ceramics.

2/  Another problem causing the PLL not to work is a problem with the clearance of IC pins shorting out on the top ground plane of the PC board. It is best not to push the ICs down too far into the PC board before soldering to leave a slight gap. 

3/  Display reads ok and shows locked even when the 1250MHz transmitter is turned off.  DC output from the TSA5511 to control the PLL sits at around 2 to 3 volts and doesn't shift when tuning.  The PIC16F84 was found to be faulty.  I tried reprogramming it but it still caused the same problem.  A new programmed PIC fixed the fault.

4/  A common fault has been damage to the PIC16F84, TSA5511, and LCD module due to over voltage from the onboard 5v regulator.  Many have forgotten to solder the center pin of the 78L05 to the top ground plane of the board for earthing.

5/  Any erratic RF problems are normally due to poor RF connections, or RF problems with the transmitter.

6/  Interference on the picture which looks like faint vertical bars floating across the picture is caused by the 6.4MHz oscillator on the PLL board radiating into the video transmitter board.  The problem may only be seen with some video sources depending on the timebase frequency being used in the camera or pattern generator.  lead dress of the PLL board and Video Transmitter, and shielding should fix this.  Keep the DC tune output lead to the transmitter away from RF.  Also try a 10pF ceramic capacitor on the DC tune output of the PLL board to ground, ( across the B-E junction of the BC547 ).  Decoupling on the power supply rails with electrolytic capacitors is also worth trying.

7/  Black dot interference or fine horizontal lines on the picture can be radiation from the LCD display modules cable.  Lead dress will normally fix this. 

8/  To reduce phase noise when multiplying up to 10GHz, try adding a 1nF capacitor from pin 18 to ground on the TSA5511.

 

 

EME79 1250MHz VIDEO TRANSMITTER KIT Updated Thursday 10th January 2002

Discontinued Product No Longer Supported.

1/ A potential problem could be the soldering of one of the 22uF electrolytic capacitors on the board. It is located at the bottom LHS of the board just above the 100uF Cap. A track runs between the two connections underneath the capacitor. Be careful to align the capacitor when soldering in. Final artwork unfortunately did not fix this problem. Also initial artwork shows the capacitor around the wrong way. The +ve should be on the RHS. 

2/ It has been reported that the ERA5 is getting very hot. This was thought to be normal as an older data sheet specifies the bias as 5volts and 80mA.  This seems to be a misprint as the ERA Amplifier design guide specifies 4.9volts and 65mA.  The 150 and 180 ohm SMD chip resistors should be replaced with 2 x 220ohm in parallel.  Also for any other faults in this area, check that there is no copper tracking around the ERA5's mounting hole in the PCB. Use a Multimeter to confirm that there are no shorts. 

3/ There has been a report of spurious outputs from the transmitter spaced at +/- 150MHz from the main carrier when tuning across the band. Initially I was not able to duplicate the problem with the prototypes as the board layout is slightly different compared with the final boards.  I was sent a EME79 board along with a EME77 PLL board that was erratic in operation.  The PLL was having trouble locking due to their being multiple output frequencies being produced by the VCO on the EME79 board.  I then disconnected to the PLL and ran the EME79 free running, and found that when tuning the trimpot the output was unstable and was producing multiple spurs each side of the main output.  Putting a finger near the tuning lines tended to dampen the problem, and increase the output power.  The problem was eventually tracked down the the value of L3, ( 100nH ). I have now changed the value to 1000nH, ( 1uH ) which seems to have fixed the problem.  I suspect that the coils self resonant frequency is too high causing it to act more like an oscillator coil than an RF Choke.  A replacement coil was posted out to everyone who initially purchased the EME79 Kit.

4/ There has been reports of low 20mW output power from this Kit. It should produce around 50mW, (+17dBm) without the 7dB output attenuator. Tests on 2 current EME79 Transmitters have confirmed the following power outputs at the various points in the transmitter into a microwave power meter.  Outputs have been checked against a HP141 Spectrum Analyzer.  Output from BFR93A VCO (+10dBm), Output from -10dB pad (0dBm),  Output from ERA-5 40mW (+16.5dBm), Output after the -7dB pad 9mW (+9.5dBm).

5/  When using the EME77 UNIPLL on the EME79 Kit there is around 8 to 10dB attenuation through the power splitter.  This equates to only 1mW ( 0dBm ) output from the UNIPLL board to drive a power amplifier.  The output can be increased by bypassing the 7dB pad on the EME79 board which will then produce around 5mW ( +7dBm ) minimum from the EME77 board which is suitable for a M67715 Mitsubishi PA.

6/  If you are using just the EME79 with the M67715 PA and no EME77 PLL, then the 7dB pad must be changed.  The M67715 module only requires 3 to 5mW input for around 2Watts output.  Driving it with the full output 10mW, from the EME79 will drive the module too hard,producing up to 4Watts output, but with excessive heat that could damage the module. 

7/  For erratic operation of the oscillator across its tuning range, try placing a 1pF chip capacitor across the Collector Emitter junction of the BRF93A transistor. This fixed a problem recently when trying to use the transmitter on 1160MHz for a 5800MHz ATV transmitter.  This also increased the transmitters output considerably.  Another cause of erratic operation was found to be the connection of the 5.5zMHz subcarrier to the board.  The connection should be made underneath the EME79 board, not to the top side.

 

 

EME83 925 -1800MHz FM ATV RECEIVER KIT Updated Saturday 20th October 2012

Discontinued Product No longer supported.

 

 

EME85 AD9850 / 51 DDS KIT Updated Saturday 20th July 2013

Discontinued Product.

Link to the EME85 Kit webpage

 

 

EME94 to 94D 2400MHz TRANSVERTER KIT Updated Saturday 24th June 2017

Link to the EME94 Kit webpage

 

 

EME101 MULTIPLIER KIT Updated Sunday 26th December 2014

Discontinued Product.

Link to the EME101 Kit webpage

 

 

EME103 PREAMPLIFIER KIT Updated Sunday 21st July 2013

Discontinued Product No Longer Supported.

Link to the EME103 Kit webpage

 

 

EME107 5/10GHz MULTIPLIER KIT Updated Tuesday 24th May 2011

Discontinued Product.

Download the complete Kit Notes

 

 

EME114 PIC ON SCREEN DISPLAY KIT Updated Monday 7th October 2013

Discontinued Product.

Download the complete Kit Notes

Download the OSD-Software File

 

 

EME117 137MHz WEATHER SATELLITE RECEIVER KIT Updated Monday 17th November 2014

1/ Kit change after April 2011. BF988 replaced with the Mini-Kits BF998R-M

2/ Major Kit changes 2nd January 2011 due to the Toko MC120 0.8uH coils being obsolete. Changed to a MC120 0.9uH and reduced capacitors across these coils by 2 to 3pF so that they would tune 137MHz. 10pF capacitor across L1 changed to a 6p8, 12pF on L2 changed to 10pF, 15pF across L3 changed to 12pF, 12pF across L4 changed to 10pF.

3/  Problem, Motor boating sound from the speaker.  Make sure that the two 0.1uF monolithic capacitors near pin 4 of the MC13135, and the 455KHz demodulator coil are soldered to the top ground-plane of the PC Board.  These are used for power supply decoupling. In later Kits just make sure that they have been fitted to the board.

4/ Thanks to Kevin Murphy for the following comments. Just constructed the WESAT Rx the other day. Measured sensitivity was -120 dBm (0.223uV) for 12 dB sinad. The deviation used was 10 kHz. Sinad did reduce at low deviations ~ 3kHz and near 17 kHz, but was reasonably constant from5 to 15 kHz. An important note is that the MC120 coils have two ways of fitting. The cold side (or low end of the winding) is closest to the plastic nipple extending out from bottom end of the can. An article many, many years ago in NZART Break In, showed significant degradation in Q if fitted incorrectly. The input coil, with nipple in the can facing towards the BF988 Mosfet, while the three coils following the RF stage should face towards the VCO coil. The VCO coil should face towards the AFC/Normal Link.

Discontinued Product.

Download the complete Kit Notes

 

 

EME124 UNIVERSAL PLL KIT Updated Tuesday 11th November 2008

1/ A fault that can occur is no control of the PLL.  Check for any solder dags from the 2 x etched strip lines on the top side of the board to the ground plane. This seems to be a manufacturing problem with the PC boards.

2/  Any erratic RF problems are normally due to poor RF connections, or RF problems with the transmitter.

3/  Interference on the picture which looks like faint vertical bars floating across the picture is caused by the 4MHz oscillator on the PLL board radiating into the video transmitter board.  The problem may only be seen with some video sources depending on the time base frequency being used in the camera or pattern generator.  lead dress of the PLL board and Video Transmitter, and shielding should fix this.  Keep the DC tune output lead to the transmitter away from RF.  Also try a 1uF electrolytic capacitor on the DC tune output of the PLL board to ground, ( across the B-E junction of the BC547 ).  Decoupling on the power supply rails with electrolytic capacitors is also worth trying.

4/  Black dot interference or fine horizontal lines on the picture can be radiation from the the LCD display modules cable.  Lead dress will normally fix this.

Software Description Download Synth Readme Document

Download the complete Kit Notes

Software Ver2.10 Only Available By Email. Not For Commercial Use

Discontinued Product No Longer Supported.

 

 

EME125 CONTROL KIT Updated Monday 23rd December 2002

Discontinued Product No Longer Supported.

1/  A fault that can occur is no rotary encoder operation.  Make sure that the common terminal on the encoder that goes to DB4 is soldered on both sides of the board.

2/  For any other faults also make sure that connections are soldered on both sides of the board. 

 

 

EME128 2400MHz 2WATT MMIC PA KIT Updated Monday 7th October 2013

Discontinued Product No Longer Supported.

Download the complete Kit Notes

 

 

EME129 DDS CONTROL BOARD 2 KIT Updated Monday 7th October 2013

Discontinued Product.

Download the complete Kit Notes

 

 

EME139 1960 to 2360MHz MULTIPLIER KIT Updated Monday 21st January 2013

Discontinued Product.

Link to the EME139 Kit webpage

 

 

EME141 POWER AMPLIFIER KITS Updated Wednesday 17th July 2013

Link to the EME141 Kit webpage

 

 

EME144 2.6GHz RELAY KIT Updated Saturday 18th May 2013

Link to the EME144 Kit webpage

 

 

EME150 PIC CONTROLLER KIT Updated Wednesday 17th July 2013

Discontinued Product.

Link to the EME150 Kit webpage

 

 

EME151A/B RF POWERHEAD KITS Updated Saturday 6th July 2013

Link to the EME151 Kit webpage

 

 

EME154 1250MHz FM ATV TRANSMITTER KIT Updated Thursday 18th July 2013

Link to the EME154 Kit webpage

 

 

EME157 VHF PREAMPLIFIER KIT Updated 24th January 2015

Link to the EME157 Kit webpage

 

 

EME158 AUDIO SUBCARRIER KIT Updated Wednesday 27th March 2013

Link to the EME158 Kit webpage

 

 

EME161A WIDEBAND PHASE LOCKED LOOP KIT Updated Thursay 18th July 2013

Link to the FMATV Kit webpage

 

 

EME161B SP5055 PLL CONTROLLER KIT Updated Thursday 18th July 2013

Link to the FMATV Kit webpage

 

 

EME162 0.5WATT 1200MHz PA KIT Updated Saturday 25th June 2016

Link to the EME162 Kit webpage

 

 

EME165 AD995x DDS KIT Updated Tuesday 7th June 2016

Link to the EME165 Kit webpage

 

 

EME166 SEQUENCER KIT Updated Friday 31st May 2013

Link to the EME166 Kit webpage

 

 

EME167 AD9851 I/Q DDS and DDS VFO KITS Updated Thursday 18th Julyy 2013

Link to the EME167 Kit webpage

 

 

EME171 SERIES KITS Updated Tuesday 11th June 2013

Link to the EME171 Kit webpage

 

 

EME173 SERIES PREAMPLIFIER KITS Updated Tuesday 11th August 2015

Link to the EME173 Kit webpage

 

EME174 AMPLIFIER KIT Updated Saturday 20th July 2013

Link to the EME174 Amplifier Kit webpage

 

 

EME174 FILTER KITS Updated Saturday 20th July 2013

Link to the EME174 Filter Kits webpage

 

 

EME175 400/500MHz OSCILLATOR KITS Updated Wednesday 9th March 2015

Link to the EME175 Kit webpage

 

 

EME177 OSCILLATOR HEATER KIT Updated Saturday 20th July 2013

Link to the EME177 Kit webpage

 

 

EME187 M1 LOGIC INTERFACE KIT Updated Monday 17th November 2014

Link to the EME187 Kit webpage

 

 

EME189 ENCODER KIT Updated Monday 17th November 2014

Link to the EME189 Kit webpage

 

 

EME190 PIC18F4520 MICRO-CONTROLLER KIT Updated Monday 17th November 2014

Link to the EME190 Kit webpage

 

 

EME201 M1 SERIES AMPLIFIER KIT Updated Friday 1st August 2014

Link to the EME201 Kit webpage

 

 

EME202 M1 SERIES MIXER AMPLIFIER KIT Updated Saturday 30th January 2016

Link to the EME202 Kit webpage

 

 

EME203 M1 SERIES CRYSTAL FILTER KIT Updated Saturday 12th March 2016

Link to the EME203 Kit webpage

 

 

EME204 M1 SERIES 9MHz IF AGC Amplifier KIT Updated Sunday 1st November 2015

Link to the EME204 Kit webpage

 

 

EME205 M1 SERIES 9MHz BFO DEMODULATOR KIT Updated Monday 11th August 2014

Link to the EME205 Kit webpage

 

 

EME206 M1 SERIES 500mW AUDIO AMPLIFIER KIT Updated Monday 2nd February 2015

Link to the EME206 Kit webpage

 

 

EME207 M1 SERIES PRESELECTOR FILTER KIT Updated Monday 12th January 2015

Link to the EME207 Kit webpage

 

 

EME208 M1 SERIES TRANSMIT MODULATOR KIT Updated Monday 14th December 2015

Link to the EME208 Kit webpage

 

 

EME209 M1 SERIES LOW PASS FILTER KIT Updated Tuesday 16th June 2015

Link to the EME209 Kit webpage

 

 

EME210 M1 SERIES 16W HF Amplifier KIT Updated Monday 14th December 2015

Link to the EME210 Kit webpage

 

 

EME211 M1 SERIES Attenuator Trap KIT Updated Thursday 24th December 2015

Link to the EME211 Kit webpage

 

 

EME3400 SERIES KITS Updated Monday 25th April 2013

Link to the EME3400 Kit webpage

 

 

EME5800 SERIES KITS Updated Monday 25th April 2013

Link to the EME5800 Kit webpage

 

 

GALI-39 SERIES KITS Updated Saturday 25th June 2016

Link to the EME162 Kit webpage

 

 

GALI-84 SERIES KITS Updated Saturday 25th June 2016

Link to the EME162 Kit webpage

 

 

HF-DDS KIT Updated Sunday 23rd November 2014

Link to the HF-DDS Kit webpage

 

 

MGA-31189 KIT Updated Saturday 25th June 2016

Link to the MGA-31189 Kit webpage

 

 

MINI-KITS FM ATV KITS Updated Wednesday 24th June 2014

Link to the EME23TX-ATV Kit webpage

 

 

MITSUBISHI PA KITS Updated Saturday 20th July 2013

Link to the Mitsubishi-PA Kit webpage

 

 

PGA-103 KIT Updated Saturday 25th June 2016

Link to the PGA-103 Kit webpage

 

 

PHA-1 KIT Updated Saturday 25th June 2016

Link to the PHA-1 Kit webpage

 

 

RA-HF / VHF / UHF / SHF PA KITS Updated Saturday 20th July 2013

Link to the Mitsubishi-PA Kit webpage

 

 

AD9851 SWEEP KIT Updated Saturday 6th July 2013

Link to the SWEEP Kit webpage

 

 

WA19 x4 MULTIPLIER KIT Updated Sunday 20th January 2013

Discontinued Product