Author Archive
Crypto virus how safe is Digital broadcasting?
May 13th, 2017 | 
Author: With IT systems crashed around the world, including the UK's National Health IT systems. How open and vulnerable is digital broadcasting to cyber attacks?
More and more radio stations have recently been pulling the plug on Shortwave, and AM broadcasting, in favour of digital. There has been a big push in the UK to get the public over to DAB (Digital Audio Broadcasting) or streaming radio via their mobile phones and computers. But, has the case now been made to "keep" a national simulcast AM radio system, like the BBC's Radio 4 Long Wave in the UK, along with global Shortwave radio transmissions for state broadcasting in emergency?
More and more radio stations have recently been pulling the plug on Shortwave, and AM broadcasting, in favour of digital. There has been a big push in the UK to get the public over to DAB (Digital Audio Broadcasting) or streaming radio via their mobile phones and computers. But, has the case now been made to "keep" a national simulcast AM radio system, like the BBC's Radio 4 Long Wave in the UK, along with global Shortwave radio transmissions for state broadcasting in emergency?
Crypto virus how safe is Digital broadcasting?
With IT systems crashed around the world, including the UK's National Health IT systems. How open and vulnerable is digital broadcasting to cyber attacks?
More and more radio stations have recently been pulling the plug on Shortwave, and AM broadcasting, in favour of digital. There has been a big push in the UK to get the public over to DAB (Digital Audio Broadcasting) or streaming radio via their mobile phones and computers. But, has the case now been made to "keep" a national simulcast AM radio system, like the BBC's Radio 4 Long Wave in the UK, along with global Shortwave radio transmissions for state broadcasting in emergency?
More and more radio stations have recently been pulling the plug on Shortwave, and AM broadcasting, in favour of digital. There has been a big push in the UK to get the public over to DAB (Digital Audio Broadcasting) or streaming radio via their mobile phones and computers. But, has the case now been made to "keep" a national simulcast AM radio system, like the BBC's Radio 4 Long Wave in the UK, along with global Shortwave radio transmissions for state broadcasting in emergency?
UK speaker source for BITX40 & other QRP projects
If your currently on the BITX40 bandwagon of putting a kit together, or you have just recently ordered one. You will have soon noticed the kit doesn't come supplied with a speaker, what does one expect for such a good price! But for UK builders that don't like spending their hard earned cash. I have found an abundant source of small 8 ohm speakers from the highstreet discounter Poundworld.
Two speakers including cases for One Pound!!
The speakers are marketed for use with portable stereos, MP3 players, etc. A simple test to see if they were any good, I connected them to a reliable audio source and found although not HI-FI, they are perfectly adequate for use in the BITX Kit, or other QRP constructional projects.
They come packed in either Black or Silver.
Once unscrewed the back of the case, the speaker simply drops out to reveal a 5.5cm 2" unit.
A quick test on the multimeter revealed the value of 7.6 ohm:
Recently while out shopping I have visited 4 different Poundworld's, one as far North as Southport. All carried a plentyful supply of stock in their electrical area. I am sorry I cannot help my readers from overseas, but the unit is obviously made in China so try your Dollar shops.
Good hunting!
Two speakers including cases for One Pound!!
The speakers are marketed for use with portable stereos, MP3 players, etc. A simple test to see if they were any good, I connected them to a reliable audio source and found although not HI-FI, they are perfectly adequate for use in the BITX Kit, or other QRP constructional projects.
They come packed in either Black or Silver.
Once unscrewed the back of the case, the speaker simply drops out to reveal a 5.5cm 2" unit.
A quick test on the multimeter revealed the value of 7.6 ohm:
Recently while out shopping I have visited 4 different Poundworld's, one as far North as Southport. All carried a plentyful supply of stock in their electrical area. I am sorry I cannot help my readers from overseas, but the unit is obviously made in China so try your Dollar shops.
Good hunting!
UK speaker source for BITX40 & other QRP projects
If your currently on the BITX40 bandwagon of putting a kit together, or you have just recently ordered one. You will have soon noticed the kit doesn't come supplied with a speaker, what does one expect for such a good price! But for UK builders that don't like spending their hard earned cash. I have found an abundant source of small 8 ohm speakers from the highstreet discounter Poundworld.
Two speakers including cases for One Pound!!
The speakers are marketed for use with portable stereos, MP3 players, etc. A simple test to see if they were any good, I connected them to a reliable audio source and found although not HI-FI, they were perfectly adequate for use in the BITX Kit, or other QRP constructional projects.
They come packed in either Black or Silver.
Once unscrewed the back of the case, the speaker simply drops out to reveal a 55cm 2" unit.
A quick test on the multimeter revealed the value of 7.6 ohm:
Recently while out shopping I have visited 4 different Poundworld's, one as far North as Southport. All carried a plentyful supply of stock in their electrical area. I am sorry I cannot help my readers from overseas, but the unit is obviously made in China so try your Dollar shops.
Good hunting!
Two speakers including cases for One Pound!!
The speakers are marketed for use with portable stereos, MP3 players, etc. A simple test to see if they were any good, I connected them to a reliable audio source and found although not HI-FI, they were perfectly adequate for use in the BITX Kit, or other QRP constructional projects.
They come packed in either Black or Silver.
Once unscrewed the back of the case, the speaker simply drops out to reveal a 55cm 2" unit.
A quick test on the multimeter revealed the value of 7.6 ohm:
Recently while out shopping I have visited 4 different Poundworld's, one as far North as Southport. All carried a plentyful supply of stock in their electrical area. I am sorry I cannot help my readers from overseas, but the unit is obviously made in China so try your Dollar shops.
Good hunting!
Bargain 2000 Resistor deal.
Not had much time to hunt out components of late, but this seems a very good deal for constructors and QRP engineers.
2000 1/4W, 100 different values, 5% resistors. 20 of each value. £6.55 UK just over $8 US including shipping click down to: Resistor deal.
I have just got in there and ordered a bag full before you all wade in..
2000 1/4W, 100 different values, 5% resistors. 20 of each value. £6.55 UK just over $8 US including shipping click down to: Resistor deal.
I have just got in there and ordered a bag full before you all wade in..
Bargain 2000 Resistor deal.
Not had much time to hunt out components of late, but this seems a very good deal for constructors and QRP engineers.
2000 1/4W, 100 different values, 5% resistors. 20 of each value. £6.55 UK just over $8 US including shipping click down to: Resistor deal.
I have just got in there and ordered a bag full before you all wade in..
2000 1/4W, 100 different values, 5% resistors. 20 of each value. £6.55 UK just over $8 US including shipping click down to: Resistor deal.
I have just got in there and ordered a bag full before you all wade in..
PW makes an appearance at WH Smith
Until recently Practical Wireless was only available on the newsstand at larger branches of WH Smith. Getting hold of a copy proved useless at smaller branches unless you had it reserved in advance, infact I gave up many years ago asking why it wasn't present every month? In the end I got a local corner newsagent to reserve it for me, I guess he has been grateful of the business ever since.
However could the tide of policy changed it's direction at my local small branch of WH Smith and others? PW is once again available on the shelf, forefront, alongside with it's sister magazine Radiouser.
Practical Wireless is the only independent magazine representing the amateur radio hobby in the UK, it is good to see someone has finally done something to get it back where it belongs, so a new generation can peruse and purchase it along with us old timers.
However could the tide of policy changed it's direction at my local small branch of WH Smith and others? PW is once again available on the shelf, forefront, alongside with it's sister magazine Radiouser.
Practical Wireless is the only independent magazine representing the amateur radio hobby in the UK, it is good to see someone has finally done something to get it back where it belongs, so a new generation can peruse and purchase it along with us old timers.
