In this episode, Martin M1MRB / W9ICQ is joined by Leslie Butterfield (G0CIB) and Chris Howard M0TCH to discuss the latest Amateur / Ham Radio news. Colin M6BOY rounds up the news in brief, and this episodes feature is  - Monitoring your RF

• Fox-1 Operating Guide
• Good Evening Net from India
• UK Regional Secondary Locators Guidance
• Funding for National Radio Archive
• Liquid Metal Antenna
• Ham Radio Licenses for CubeSat Students
• Icom IC-7600 HF New Firmware
• Radio with No Analog Parts?

Colin Butler, M6BOY, is the host of the ICQ Podcast, a weekly radio show about Amateur Radio. Contact him at [email protected].

Some years ago, QST had an article on a crystal set based on a zero bias MOSFET.  Although I have yet to try this sort of design I have no doubt they will work well.  Crystal sets derive all their power from the TX and in the past I have achieved some remarkable (well for me!) results.  Best was receiving Radio Australia (from Australia) as well as some amateur Gs on 80m and 160m at a considerable distance. In the USA some 75m AM amateur stations are regularly heard at great distances.

See http://makearadio.com/visitorsprojects/ralf-mosfet.php .

Roger Lapthorn, G3XBM, is a regular contributor to AmateurRadio.com and writes from Cambridge, England.

Several times in the past I have said that, if all other magazines had to be cancelled I’d keep GQRP Club’s SPRAT magazine. This small format magazine comes out quarterly and is excellent value for money. You don’t get the endless adverts by the few remaining national radio companies in the UK, just a few adverts from companies selling bits.  Every quarter there are articles showing things to build or ideas on which to base your own projects.

SPRAT really is first class and all produced by unpaid volunteers who love our hobby. As much as I enjoy browsing PW and RadCom, I look forward to getting SPRAT far more.

See http://www.gqrp.com/ .

Roger Lapthorn, G3XBM, is a regular contributor to AmateurRadio.com and writes from Cambridge, England.

May brought Radcom the RSGB's monthly magazine for its members. It normally takes me about a month to hunt out the bits what I want to read, then it gets filed in the pile with the rest. A quick flick through is always the norm, this months (June issue), as I was perusing through at great speed over my evening tea, I hit the bi monthly QRP page written by the Rev George Dobbs (G3RJV). What is this, my name and callsign suddenly grabbed me! George was reviewing my Blog and items I had pulled to the front from the Chinese and others.







                                                                                                    
History lesson: The first time I came to know of a George Dobbs, was back in the mid 1970s when I was a schoolboy at around the age of 12. I built his project Making A Transistor Radio published in a Ladybird book. A three transistor germanium circuit that was slowly put together in stages from a crystal set, to a fully working regen radio. Built without a soldering iron, perhaps he didn't want us to burn our fingers? Components clamped down under screws and screwcups on a piece of wood. The radio worked first time and was the first electronic project I ever built. At the time I didn't know much about George Dobbs, only 20 years or so in the late 1990s, I would return back to the book and discover that this was the G3RJV George Dobbs associated with the G-QRP club he formed in 1974. Since then, George has gone on to write many QRP related books, monthly insert Carrying on the Practical Way in Practical Wireless, and  of course QRP in Radcom and a few others.
 
So it was an honour to find he had devoted his entire QRP page over to my blog. My wife has got fed up with me by now picking up and down Radcom every five minutes and reading the page over and over again. She said of course you're going to blog it, you bet sure I am!

George starts his review of my blog explaining the name "The Font of all Knowledge" and how linguistic scholars that make up half of the RSGB would lay me open to scorn for using the name Font, but how Oxforddictionaries.com claims household split over the word scone. Of course being a man of the cloth he would know from the amount consumed at the tea parties he has resided over at the Vicarage over the years of his service. The real secret is I take no applause for the name, this I give over to my linguistic friend, scholar, and blogger  Roger G3XBM,  who is the one whom is responsible for thinking it all up. Before I started my blog I was passing him over information "and still do" about useful links that could prove valuable to be included in his blog. Roger refered to me as the Font of All Knowledge, so I decided to use this when I created my blog late last year.

I now hope that puts peoples minds at rest where the name came from.

Once George has made every one happy, and comfortable, with the name and the importance of its place within the hobby. He then continues forward taking a look at the items I have reviewed, the pixie kit  which G3XBM also picked up on and built one.

The Oscilloscope Kit, I recently noted and passed the information over to G3XBM:

http://www.banggood.com/DIY-Digital-Oscilloscope-Kit-Electronic-Learning-Kit-p-969762.html

PSDR from Michael Colton:

http://g1kqh.blogspot.co.uk/2014/10/pdsr-from-michael-cotton.html

I have been very happy with what I have seen G3RJV write, and I am glad the blog continues to score many daily hits from Amateurs around the world.  Of course its up to me to find things new, this will continue, when I see something good, and of value, along with other aspects of the hobby I am involved in.

Thank you G3RJV for bringing this to the forefront of Radcom, and thanks to G3XBM for creating the name "The Font of all Knowledge" Swoon! (I only went to a Comprehensive school that got burnt to the ground twice in 4 years while I was being educated there.)  

Thanks to Graham G3MFJ for supplying the photo.










Steve, G1KQH, is a regular contributor to AmateurRadio.com and writes from England. Contact him at [email protected].

Amateur Radio Weekly is curated by Cale Mooth K4HCK. Sign up free to receive ham radio's most relevant news, projects, technology and events by e-mail each week at http://www.hamweekly.com.

Big Wheel for 2m

A good 2m antenna for horizontal polarisation is the big wheel. Quite a few beacons use these as they require no rotator and a couple of these stacked give about 5dBd gain horizontally. So, these would be ideal for fixed station use. They would suit me well for UKAC 2m contests and general 2m SSB/CW use. I know that my 3 el, hand rotated, beam has about the same gain.  One big wheel alone is better than a halo, but two suitably phased would be better than a small beam.

Roger Lapthorn, G3XBM, is a regular contributor to AmateurRadio.com and writes from Cambridge, England.

A recent posting to Yahoo's 'GQRP' reflector spurred discussion of the growing number of fake transistors being seen on e-bay. A builder enquired about the low efficiency noted in his recently built Chinese '49er' kit.

I recently bought one of the Chinese Forty-9er transceiver kits off ebay and on receive it works well. It certainly transmits, but the power is down to 800mW and the driver transistor is getting very hot. I'm not expecting a lot of power from it, but power claims are 1.8W to 3W. I'm more concerned about the hot driver transistor. The following link shows the circuit diagram.

http://www.ebay.com/itm/DIY-kits-Frog-Sounds-HAM-Radio-QRP1-8W-CW-Transceiver-Receiver-7-023MHz-/121507448525

I've checked for spurious oscillation (a problem I've had before), but can find nothing. Does anyone have any ideas for why the transistor is getting hot?

It was suggested that the transistor in the PA may not be up to specs and even be a 'fake' as these types are commonly noted on e-bay, selling for prices that are too good to be true.
 

If you have purchased fakes or have found a Chinese source of the real thing, please let us know ... I'm sure there are plenty of dealers selling the real thing out there.
Steve McDonald, VE7SL, is a regular contributor to AmateurRadio.com and writes from British Columbia, Canada. Contact him at [email protected].