AmateurRadio.com

I'm presently on the high seas...well not too high...off the coast of Oregon and using the ship Internet system...if the video links in today's blog do not show up, because of limited bandwidth uploads, they may be found on a YouTube search for W0VLZ and for N2OUV.....hopefully they show up and this won't be required!
Steve McDonald, VE7SL, is a regular contributor to AmateurRadio.com and writes from British Columbia, Canada. Contact him at [email protected].

As mentioned in an earlier blog, the annual winter Bruce Kelley (BK) QSO Party, usually spurs some new construction of transmitters styled after those that were popular in the late 20's and early 30's. The main stipulation for entry into the two-weekend affair is that transmitters must be self-excited (no crystals) and use tubes that were available in 1929 or earlier.

Initially this might seem a difficult task, and that was my first reaction when first learning of the vintage operating event. Once I had learned more about these types of transmitters and actually listened to the BK action, I knew that it was something that I really wanted to do. After seeing several inspiring videos from Neil (WØVLZ) and Joe (N2OUV), demonstrating their homebuilt '29 TNT transmitters, I knew it was something that I really had to do! Perhaps the videos will grab you as well:


See more of this transmitter in action here.



One of the first things that might seem impossible to obtain would be a suitable tube that was available in 1929. Most of the tubes used in transmitters back then were designed for receivers, usually audio tubes that were pressed into RF oscillator or amplifier service. In the dirty-thirties, larger RF tubes were expensive and beyond the reach of most amateurs unless they had deep-pockets.

Tubes commonly found in BK transmitters are the type 10, 210, 45, 245, 27 and the 227. All of these types are still available today with some being more costly than others.

The most common tube is the type 10 or 210 which is also available in a military format, still NIB, as the VT-25. This is the same tube used in the WØVLZ transmitter.

This tube can easily handle the 10W power requirements imposed by the BK and then some.
Typical prices range from $50 and up.

The next most popular is the 45 or 245, which is pretty well maxed-out at around 5-7 watts. The cost of a 45 is about half that of a VT-25.


The widely available and inexpensive 27 / 227 will produce 2-3 watts of output...more than enough to work across the continent under normal conditions. The low cost (around $5) makes these particularly attractive for the first-time builder as a transmitter using a pair of these (or more) in parallel is an easy way to get started.



Here is a list of popular tubes that could be used for BK-eligible '29-style transmitters. There are probably more but these are the ones seen most often:


Suitable tubes are always available on e-Bay and from dedicated online tube-sellers. A quick Google-search will turn up several sellers, with prices and condition. Of course, one of the first places to look should be any of your ham friends with deep junk-boxes, especially those that have been building or amassing parts for many years. Check out the next ham fleamarket...especially those dusty old boxes under the seller's table. And...there are probably several hundreds of basements still filled with suitable old parts, just waiting to be liberated....seeking them out is all part of the '29 building fun.

Once a decision has been made to go forward with a '29 project, the first thing is to decide on the type of transmitter to build. There were three popular designs back in the late 20's, each with their own pro's and con's. I'll tell you more about these next and give you a few suggestions for getting started.

In the meantime, see what your 'oldest' ham acquaintance might have in his basement and keep an eye-out for any ARRL Handbooks from the early 30's as they are full of valuable building ideas....and you may wish to check-out K7JPD's ideas for finding old parts.
Steve McDonald, VE7SL, is a regular contributor to AmateurRadio.com and writes from British Columbia, Canada. Contact him at [email protected].

We all call them Baofeng the original name, but now they are called Pofung. Who really cares about the name? They are a budget priced HT capable of 2m/70cm and other freqs, they have lots going for them.

Take the survey to the right of the Blog and lets see which one of the 5 you like.

We have the pocket sized UV-3R which includes all models MK1/2.  and Plus..
The full sized UV-5R, again includes all models RA, RC, RE etc.
UV-B5 and UV-B6
The rugged UV-82
The budget priced BF-888s 16 CH UHF model.




                                          UV-3R     UV-5R    UV-5B/B6  UV82    BF-888s


I will let the survey run for a month, perhaps in the comments you will let us know what you like and don't like about them?


Of course if you don't own a Baofeng yet, take a trip down to Hans PD0AC Blog, and do a search for a model which takes your fancy, he has written full reports on most of them:

http://hamgear.wordpress.com/

I know which one is my favourite which is yours?  



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

Jamboree-on-the-Air

The Jamboree-on-the-Air, or JOTA, is an annual Scouting event that uses amateur radio to link Scouts around the world, around the nation, and in your own community. Held on the third full weekend of October each year, this worldwide jamboree requires no travel, other than to a nearby radio amateur’s ham shack. Many times the hams will come to you by setting up at a Scout camporee, or perhaps they already have a ham shack at your council’s camp. There are many ways to get your Scouts involved in JOTA.

I look forward to monitoring IRLP reflector 9091 for JOTA traffic all day.

Filed under: Ham Radio Tagged: irlp, jota

Jeff Davis, KE9V, is a regular contributor to AmateurRadio.com and writes from Indiana, USA.

You do wonder when you start publishing your finds, and thoughts, via a blog if folk will read them?

Well a look at the stats reveal they do:

	United Kingdom 585 United States 178 Netherlands 33 Ireland 21 Germany 8 Greece 6 Australia 5 Ukraine 5 Austria 4 Canada 4
	Thanks for reading I will write some more soon.

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

After viewing so many interesting YouTube videos of various Perseus DX catches, I realized that my present method, using just my I-pad, had to change.

I asked a few of the folks that had been posting high-quality captures, what method they were using, and learned a bit about "screen recording" software. These programs allow you to capture, in reasonable definition video, exactly what is appearing on your computer screen....in this case, the Perseus user interface.
I ran across several freeware offerings, all requiring downloading and installation but reviews of most showed problems ranging from excessive malware along with the software, embedded viruses and glitchy performance issues.

I then came upon an online screen recorder called "Screenr" which required no downloading, no sign-up and had rave reviews from several sources. Screenr allows you to capture up to five minutes of video per file and then to either save it on your own system in .mp4 format for editing, upload it to a host of social media sites or directly to YouTube.

I fired-up Perseus and then Screenr to gave it a try. The first thing that popped-up was an adjustable frame that allows you to size your video so that just the wanted subject is visible and any additional screen clutter is not included.

As a test, I made two recordings and uploaded them to YouTube. To my delight, it all worked quickly and seamlessly although it seems that I need to do further experimenting with my audio level settings.

The first video shows two new broadcast band catches that were logged this week, using the new loop pointed to the east. KRJO in Monroe, Louisiana (1 kW) and CHTO in Toronto (1 kW) both in the top-end of the band.



The second video shows my two favorite NDB-band propagation indicators... AA (365 kHz) near Fargo on the ND/MN border as well as little 25-watter, YLJ (406 kHz) in Meadow Lake, Saskatchewan. Either of these make fine prop indicators for the 630m as well and can be heard from both the east and the west parts of the country.

Courtesy: https://maps.google.ca

The bottom line is that Screenr seems to work extremely well and is an excellent way of saving some of your SDR catches for web or blog site posting. As well, it could be used for making voice-narrated instructional videos limited only by your imagination....it gets a 5 out of 5 from me!


Steve McDonald, VE7SL, is a regular contributor to AmateurRadio.com and writes from British Columbia, Canada. Contact him at [email protected].