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Diplexer 2m/70cm
QRP 144MHz/430MHz Diplexer for Arrow Antenna
R60.00
Perspex Case
HF Beacon Radio Case in transparent Perspex
R240.00
The basic QNC unit is a small box that is inserted in between the main antenna coax from the main antenna and the radio to reduce noise
R1,599.00
Kit Assembly Service
R100.00
Diplexer 2m/70cm
144MHz/430MHz Diplexer (DIP270)
Kit contains a small PCM measuring approx 16mm x 30mm populated with the necessary components. User only has to add the three co-ax cables.

Perfectly suited and sized to fit inside a PVC pipe which holds the elements of the Arrow Antenna. Connects to a 70cm antenna and a 2m antenna and feeds back to a handheld walkie-talkie radio which is then used for satellite workings.

QRP 144MHz/430MHz Diplexer for Arrow Antenna
QRP 144MHz/430MHz Diplexer for Arrow Antenna
R60.00
Perspex Case
Case Kit (Perspex) (PUCase)
A beautiful locally produced case made from perspex.

The complete set includes:a few of the essential elements, such as plugs and switches. Refer to the photos.

There is plenty of space in the box for more stuff to be added (voltage regulators, amplifiers, more modules, who knows!).

Typically the right toggle switch is labeled "Power", for switching the unit On and Off. I purposely left out an "On" and "Off" label because different parts of the world disagree on whether On should be down or up, e.g. US has "On" conventionally up, whereas UK has "On" conventionally down. When wiring the power switch, simply use two of the switch terminals, i.e. use the switch in single-throw (SPST) mode; for example, wire the switch between the incoming +5V lead from the power socket, and the +5V pad on the U3S board edge.

The left toggle switch can be used for whatever else you want. You could use it to select power level, switch the LCD backlight off, or any other thing which takes your fancy.

Construction is straightforward and you can customise it to your need. The top and bottom is held together by two screws.

Make sure that provision is made for adequate ventilation and additional holes may be necessary.

This is a kit and you will only be receiving a plastic bag with components that you have to assemble yourself using appropriate tools and skills. Assemblers may be available at additional cost for some kits. The photos are only representative examples of the completed kit. Always download the latest information from the website at http://www.qrp-labs.com
HF Beacon Radio Case in transparent Perspex
R240.00
HF QRM Noise Canceller (QNC) (QNC1)

How Does It Work?

The basic QNC unit is a small box that is inserted in-line with the main antenna coax that comes from the main antenna to the amateur’s radio in the shack, with one small addition: It has an extra AUX Input.

The AUX antenna (“Noise Pickup  Antenna”)is simple a length of wire 6 meters long, placed lower down to catch the local noise, if it is installed too high it will pick up the far away signals which is not what we want to reduce. The focus is on the local noise, thus a lower physical installation. I ran my own wire under the eaves of my house.

The QNC unit takes the AUX signal from the local Noise Pickup Antenna inverts it, and mixes it with the Main Antenna input. The result – which contains the wanted distant signal minus the unwanted local signal – is then sent to the amateur’s radio normal input.

By adjusting the mixing the local noise on the signal can be cancelled out almost completely. The level of cancelling can be adjusted over a wide range. The best situation is where all the local stations are cancelled out and only the far away stations are audible. But then you risk talking over the local Stations trying to contact the far stations. A bit of experimentation will be required to achieve the best operation!

During the last few months I found the unit especially useful to me working the HF bands.

The QNC currently works from 1Mhz to 30Mhz, and there are plans to expand the range from 1.5 MHz to 50 Mhz.

YouTube Link QRN In Action

The basic QNC unit is a small box that is inserted in between the main antenna coax from the main antenna and the radio to reduce noise
R1,599.00
Kit Assembly Service
Kit Assembly Service
Kit Assembly Service
R100.00
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