Sledging radios

Hytera PD405 video review

Going of sledging or skiing this year?

Depending on where you are going will make a difference.

For example, if you are planning a commercial event in Aviemore, in the Scottish Highlands for example, then a licenced VHF handheld might be the best option.

These licenced hand-held radios typically produce 5 Watts of RF power output, and allow reliable communication over a wide countryside area.

These radios can be hired or bought from Yesway.

The licenced radio solution however does have some drawbacks for sledging or skiing events.

The main disadvantage is that licenced radios are only licenced for your particular country, in most readers circumstances, the United Kingdom.

Therefore if you are an event company that organises events in more than one country, you might want to consider PMR446.

PMR446 is a licence free handheld radio standard, that allows usage in the European Union & EEA countries.

Therefore a sledger or skier could move between european countries without the licencing headaches of having to apply in each country for a licence.

The downside is range. PMR446 handheld radios operate at UHF (Ultra High Frequency) frequencies. These generally perform less well than VHF (Very High Frequency), in terms of maximum communication range.

Another important downside of PMR446, is that the RF (Radio Frequency) transmit power output is only 1/2 Watt (0.5 Watt). This compares with typically 5 Watts (0.5 Watts) for a licenced handheld radio.

Whilst having 10 times the power, does not mean the signal traveling 10 times further, it does give it more ‘punch’. This ‘punch’  helps get the signal through obstacles, such as trees, which ‘attenuate’ the signal.

 

 

 

South East Repeater

South East Repeater
South East Repeater

Do you live in the South East, and are suffering from poor performance from your radio system?

A repeater may be the answer.

Modern repeaters are mostly digital, but if you have had your radio system for some time, it may well be analogue.

This is not a problem as we can supply and install digital repeater systems that can integrate with your existing analogue system, whilst offering the option of running a digital system, as your analogue system gets gradually replaced in the future.

Star-Delta Starter Adaption for The Internet Of Things

star delta starter modifications for IOT
star-delta starter

Star-Delta Starters are used to start larger ac induction motors used in industries,such as Manufacturing and Marine.

Like ‘Direct Online’ (DOL) starters, which are also used for ac induction motors starting (though smaller, lower current motors), Star-Delta starters only turn the motor on and off at a single speed.

With the growth in the internet of things, industries, such as Mining and Marine Click To Tweet (who use Star-Delta starter systems) need to consider how to keep their business efficiency as good as their competitors.

Competitors are always seeking competitive advantage. This can be achieved through cost and efficiency savings, and IOT (Internet of Things) connectivity allows close monitoring of system processes, and so called ‘machine learning’.

In the case of a Star-Delta motor starter, there area number of outputs that we may wish to measure using sensors.

Firstly, the current being drawn by the Star-Delta starter. This includes both the starting (or In rush) current, and the FLC (Full Load Current).

Monitoring of the Full Load Current (FLC) for example is useful because an increase in current been drawn through a phase, might be due a break in one of the other phases. This causes what is known as ‘Single Phasing’ to occur.

Single Phasing can potentially damage both the motor windings and cabling from the starter to the motor, due to current doubling in the two phases still connected.

The motor windings for example, would not be designed to handle the excess current flowing through the two (still) connected ones, potentially causing damage, expense and downtime.

The Star-Delta Starter normally has a current limiting device installed, called an Over Current Relay (OCR).

There are three types of OCR, Electronic, Magnetic, and Thermal.

The OCR will detect higher than normal currents, caused for example by ‘Single Phasing’.

When single phasing is detected by the OCR, it will disconnect the three phase supply going to the induction motor (after short delay, dependent on over current size).

To be continued………

(c) 2016 Craig Miles

 

 

 

Save money with Yesway Branded Batteries

batteries

Do the batteries on your handheld two-way radio work as well as they originally did?
If not, they probably need replacing.
Original manufacturer branded batteries, such as for the Kenwood TK3301, cost around £45 + VAT.

Yesway Communications’ sell our own branded batteries for £35 + VAT for the equivalent Kenwood battery.
Our batteries are sourced from a UK supplier, and are manufactured using battery cells from top Japanese manufacturers, such as Panasonic.

Our batteries are sourced from a UK supplier, and are manufactured using battery cells from top… Click To Tweet

If you need to replace 10 batteries, that’s a £100 pound saving, based on the above example.
batteries

Chinese Two-Way Radios

I believe that some of the ‘brand name’ two way radio manufacturers are worried about the chinese manufacturers.  Without mentioning the company in question, I recently read on their website, a warning about chinese built radios, namely a potential lack of european approval.

This to me proves my initial statement, and they have good reason to worry I believe.

Whilst there are a lot of poor quality equipment being produced for the lower end of the market by some chinese manufacturers, much of it is of comparable quality with the better known western manufacturers.

HYT (Hytera) for instance, which does have a presence in the UK already makes some great products, including cutting edge digital equipment, at attractive prices.

But there are many other manufacturers in China producing quality equipment, with the required european approvals that are of super quality for the pro business user. I have come across chinese manufacturers who use 80% of well known branded Japanese components in their radio equipment.

For more information in the brands we stock from China, and the attractive prices that we can offer, get in touch.

If you think I am talking rubbish, just remember what happened to the British motorcycle industry in the 1960s & 1970s from the Japanese. I believe that the Chinese will do the same to the Japanese two-way radio industry. A sort of Karma I guess!

 

South East Two Way Radio Coverage

We can supply businesses such as taxi firms, builders and security firms with mobile two way radios with unlimited airtime from £20 a month (minimum 12 month contract).

For £20 you get a quality professional two way radio made by manufacturers such as Tait & Kenwood, plus unlimited calls via a local wide area radio repeater.

The system is available in most of the UK, and can cover the whole of the Uk for not much more money per month. Just Imagine – unlimited calls for a low fixed fee, & no unauthorised phone calls to workers friends and relatives.

Due to the power of our repeaters you usually only need small aerials that don’t require planning permission, which means you can be up and running quickly.

For a demo contact Craig on 07905 025328

 

Tait TP9135/40

P25 TRUNKED AND CONVENTIONAL PORTABLE RADIOS FOR NON-FRONTLINE USERS

TP9135/TP9140 portable radios provide affordable and reliable digital communications for non-frontline users who need exceptional audio clarity without provision for all possible features or configurations.

With industry-leading digital audio clarity, superb build quality and tested in a P25 Compliance Assessment Program (P25 CAP) recognized laboratory, the TP9100 series (TP9135/TP9140 and TP9155/TP9160) is a tough, dependable and sophisticated piece of radio engineering. Fully interoperable, the TP9100 gives you the flexibility of working in digital, analog and auto-sensing dual mode. Tait radios have a range of worker safety features and can be used on the analog, P25 conventional, trunked and simulcast networks of Tait and other manufacturers.

Tait TP7110

The TP7110 16-channel portable radio is a 16-channel conventional portable radio operating on UHF and VHF bands. It provides a lightweight, simple-to-use communication solution without compromising reliability.

Two programmable function buttons provide fast access to commonly-used features. The two-tone and five-tone Selcall signalling allows users to send and receive group and individual calls, and send caller ID information.

Transmission power can be set to low power of 1W or high power of 4W UHF or 5W VHF.

tait

Features:

  • CTCSS/DCS
  • Selective calling (2-tone and 5-tone)
  • Basic scanning
  • Economy mode
  • Programmable bandwidths
  • Windows-based programming software
  • Two programmable function buttons