Archive for the ‘Uncategorized’ Category

Low cost oscilloscope kit (Bangood)

Steve G1KQH has tracked down yet another bargain. I think my SMA assembly skills are probably still not up to the task, but you can hardly go wrong at the price which includes free air-mail shipping. Another absolute bargain. I think Steve must have shares in Bangood!!  If not, they ought to make him their UK agent, HI.

Here’s another one (kit), we could get our teeth into:

I have that many kits at the moment, I don’t know where to start next? If I come back in another life can we have a 48hour clock pse!

73 Steve
http://www.g1kqh.talktalk.net/

Amateur Radio Weekly – Issue 56

RadioShack’s blueprint for a rebirth, planned by a hedge fund
“It’s time for a new day,” Mr. Kim said, his voice tense yet steady. “We’re here today because we know this can work.”
New York Times

South African Hams get 40MHz access
Amateurs have been given ‘propagation studies’ permission to transmit between 40.675MHz and 40.685MHz.
VE7SL

Amateur Radio and Ingress
Those of us licensed have found that taking radios out on missions is a real boon, and if you ever hear simplex chat talking about “portals,” “hacking” and “deploying,” that’ll be some of the local Ingress players.
Essex Ham

TEN-TEC and Alpha purchased from RF Concepts
Less than a year after TEN-TEC and Alpha Amplifiers merged under the RF Concepts banner, the companies have changed hands.
ARRL

Infrared light offers alternative for wireless charging
Wi-Charge’s wireless charging technology claims to deliver up to 10 W of power over 10 meters.
Southgate

Spurious emissions and harmonics on Baofeng radios?
If this were correct, the Baofeng UV-5R would be the most horrible design ever. But wait, we did this already a long time ago, and the UV-5R wasn’t too bad at all.
PD0AC

A Worked All States and DX Net
Amateur Radio’s Late Night Net on 40 Meters
hhhnet.net

Time and frequency station back on the air
Time and frequency standard station WWV silenced its 25 MHz signal in 1977, but it returned to the air on an “experimental basis” a year ago, and it’s still up and running.
ARRL

How to

DRA818: A weekend VHF/UHF Radio audio transceiver project
On the board you will also find a microphone preamplifier.
Jurij Mikeln

Video

Antenna testing using WSPR
You can use a website to view a map of the station that you have heard and stations that have heard you.
K7AGE

Yaesu FT-757GX II in action
YouTube

Review

Review: Atom 40S Mobile HF Antenna
My previous experiences with HF mobile antennas have not been so great.
M0SPN

Even lower cost Pixie kits!

Steve, G1KQH has pointed me to a link with 40m Pixie kits at incredible prices. At these prices there is no way the parts could be bought for less than the kit. The version I bought for $10 looks identical. All you need is a morse key, battery 40m antenna and walkman type headphones and you have a credible 40m CW transceiver. It really works.

Yoohoo Roger,

Now I back in front of the Pixie bargain game hunt, after finding the the best price!!!
http://www.banggood.com/DIY-Radio-40M-CW-Shortwave-Transmitter-Kit-Receiver-7_023-7_026MHz-p-973111.html
£2.89!!!!!!!
and if you buy more than 2 it gets cheaper!
!

Not forgetting this includes free shipping. Unbelievable.

UK price drop – FT817ND

I see that Martin Lynch is now selling the FT817ND for £449.95 (including VAT) which I guess is reflecting the exchange rate against the yen? Years ago it sold for less than £350 with VAT. I think the dealers are still making healthy profits? Why is this like fuel? When prices go up we soon hear about it. When price or exchange rates massively improve the suppliers are generally slow to respond.

Supply and demand?   People are prepared to buy at silly prices and dealers are happy to make good profits whilst they can. At one time a few years ago £1 would get you about 125 Yen. Today £1 gets you more like 175 Yen. Have prices followed? Of course not! Don’t be silly – just a bit cheaper!

It would be nice if they were clearing stock ready for a newer model. Sadly, I doubt this is the case.

See https://sites.google.com/site/g3xbmqrp3/hf/ft817 .

More news on South African 8m band (40MHz)

Read it first hand in: www.icasa.org.za/Portals/0/Regulations/Working%20Docmuents/Radio%20Frequency%20Spectrum%20Regulations/RFSR2015.pdf

In South Africa the latest radio regulations permit the use by radio amateurs of 26dBW (400W) on a 10kHz wide band 40.675 – 40.685MHz “for propagation studies only”.    Now this is exactly what OFCOM should have done in the interest of real radio-science research.  Personally I think a wider band would be better, but how far sighted to allocate this at all.  Well done S.Africa.

OK, I  could pay £50 for a special research permit, but this is exactly what radio amateurs need for real self training and radio-science research.  The take-up might be small, but real research would take place.

OFCOM/RSGB – how about it please? You have just allocated 2MHz (2 chunks of 1MHz) of spectrum that will be used by just a handful mainly for DTV tests.  How about a much smaller slice somewhere really useful in the radio spectrum? 40MHz is mid-way between 10m and 6m, so ideal for Es tests and TEP tests over the equator.

FT991 Yaesu flagship "shack in a box"

http://www.hamradio.com/detail.cfm?pid=71-001812

The price here in the UK started out at £1279.95, (e.g. Martin Lynch and Waters and Stanton) which seemed high to me. The rig looks very attractive at the right price, but I think UK dealers are banking on “early adopters” who want a new radio at silly prices. Greed? Who said that? Surely not! Prices are a little cheaper in the USA  but not sure of VAT and duty or guarantee.  The usual guarantee from the big UK dealers on Yaesu products is 2 years, but it is wise to check.  Also, further discounts may be offered if paying cash.  I can wait and wait!   £999 seems the right price, or even less.

The latest edition of Practical Wireless shows Haydon Communication now selling it at £1099.99. I assume this price includes VAT.  I can see others matching or bettering this price when the “early adopters” have had their day.

The rig covers all modes 160m-70cms and includes a limited range internal ATU and a colour touch screen. It also supports Yaesu’s C4FM digital mode. Nice radio, at the right price. I expect the UK price will soon be £999. Wait.

Amateur Radio Weekly – Issue 55

Javascript app runs RTL-SDR in your web browser
Radio Receiver is a Chrome application that uses a USB digital TV receiver to capture radio signals and does FM and AM demodulation in the browser.
Github

DSD software decodes D-STAR audio
DSD+ is a popular Windows software tool used for decoding digital speech such as P25 and D-STAR with the RTL-SDR.
RTL-SDR.com

FCC creates Citizens Broadband Radio at 3.5GHz
The FCC staffers handling the press briefing couldn’t resist the temptation to sprinkle their discussion with CB lingo, answering some questions with things like “10-4.”
eWeek

RadioShack to be co-branded with Sprint
The current plan calls for “co-branding” about 1,440 of the surviving stores with cellular phone provider Sprint Corp.
ARRL

ISS SSTV active on weekend of April 11
The Russian Federal Space Agency (Roscosmos) has announced another round of amateur radio Slow Scan Television (SSTV) activity from the International Space Station (ISS) will take place.
AMSAT UK

Raspberry Pi Slow Scan Television (SSTV) camera
In this project the Raspberry Pi with the PiCam is used as a wireless camera which can transmit images over long distances, usually hundreds of meters!
Make:

Guerrilla Radio
How some inmates hack, rewire, and retool their radios to create walkie-talkies.
Southgate

RTL-SDR filters
A good demonstration of a pair of filters built to mitigate the front-end overload experienced on an RTL-SDR receiver.
VE7SL

Yaesu FT-450D first impressions
First impressions are of an excellent receiver with good tone and clear audio from the internal speaker.
AmateurRadio.com

A complete HF station under $1,000
I designed a complete HF radio station that would cost less than $1,000. I wanted it to operate on all modes on as many bands as possible and have it be easy to use.
KC4LMD

Is the term “ham” older than we thought?
…a telegraph station was set up, and after that, a school for training telegraph operators. In the article, they refer to the school as a “ham factory.”
KB6NU

Video

1999 introduction to Ham Radio
This vintage video gives a flavor of what amateur radio was like in the closing years of the last century.
Southgate

Deploying a Cubesat from ISS
YouTube


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