W5OLF WSPR kit?
My soldering skills are rather “challenged” since my brain bleed 13 months ago. I have an un-built Ultimate 3 kit waiting for my better health. Several kind people have offered me help to build and test it: you know who you are and thank you! The kindness of fellow QRPers knows no bounds. It is so lovely to find how many really kind people there are around. There are far more good people in the world than bad ones.
Some years ago W5OLF sold a very simple, single board, few parts, WSPR TX which I think I could manage to build. I could not find it advertised. Anyone know if it is it still available?
Roger Lapthorn, G3XBM, is a regular contributor to AmateurRadio.com and writes from Cambridge, England.
Extra SAQ 17.2kHz VLF CW transmission on Oct 24th?
Message from SAQ (sic). There appears to be some confusion over the time. If I get clarification I’ll let you know later. The transmissions are CW from the World Heritage transmitter that dates from about 90 years ago. It is run up on special occasions only.
There will hopefully be a transmission with the Alexanderson alternator on 17.2 kHz on “United Nations Day” October 24, 2014 at 10:00 UTC. Start up and tuning from about 11:30 UTC.
There will be a message written by students in Denmark.
We are not hundred percent sure we have access to the antenna this day because of other organization using it.
Roger Lapthorn, G3XBM, is a regular contributor to AmateurRadio.com and writes from Cambridge, England.
Series Seven Episode Twenty-One – Schematic and PCB Programs (19 October 2014)
Series Seven Episode Twenty-One of the ICQ Amateur / Ham Radio Podcast has been released. The latest news, Martin (M1MRB & W9ICQ) and Colin (M6BOY) an even cheaper Chinese Radio (£8) and Martin (M1MRB & W9ICQ) reviews Schematic and PCB Programs.
- EMC issues in cockpit screens
- Fishy Radio Interference
- Yagi Radio Antenna Designer Website
- Essex Air Ambulance On The Air
- EI1A - EI8GQB 20th radio activity from Ireland
- November sees second leg of SARL contests
- Founder of JOTA is SK
- When will Ofcom revoke Ham Radio licences?
- Dominica on 5 MHz
- 146 MHz allocation for UK Full licence holders
Colin Butler, M6BOY, is the host of the ICQ Podcast, a weekly radio show about Amateur Radio. Contact him at [email protected].
Series Seven Episode Twenty-One – Schematic and PCB Programs (19 October 2014)
Series Seven Episode Twenty-One of the ICQ Amateur / Ham Radio Podcast has been released. The latest news, Martin (M1MRB & W9ICQ) and Colin (M6BOY) an even cheaper Chinese Radio (£8) and Martin (M1MRB & W9ICQ) reviews Schematic and PCB Programs.
- EMC issues in cockpit screens
- Fishy Radio Interference
- Yagi Radio Antenna Designer Website
- Essex Air Ambulance On The Air
- EI1A - EI8GQB 20th radio activity from Ireland
- November sees second leg of SARL contests
- Founder of JOTA is SK
- When will Ofcom revoke Ham Radio licences?
- Dominica on 5 MHz
- 146 MHz allocation for UK Full licence holders
Colin Butler, M6BOY, is the host of the ICQ Podcast, a weekly radio show about Amateur Radio. Contact him at [email protected].
Making like Jim W1PID
So I did something this morning that I wanted to do for a very long time. I took a ride up to Washington Rock State Park in Greenbrook, NJ, which is about two towns over from South Plainfield.
It was from this vantage point that George Washington kept tabs on British troop movements during the Revolutionary War in 1777. Today, it's a state park with a monument.
To give you an idea of the view:
This gives a view towards south and east. Again with a "spy glass' it was possible to keep tabs on Sandy Hook.
There's lot of picnic tables that are just perfect for setting up a portable station, And that's exactly what I did. I launched the PAR END FEDZ into a handy tree and proceeded to go to town.
On 20 Meters, I worked W5AHP, Joe in Texas, and then WN2DX, Marty in Somerset, NJ. We were probably line of sight communications! After Marty, I worked Kurt W8IQ in Toldeo, Ohio. Before QSYing to another band, I snagged W1AW/4 in Alabama.
The lower end of 20 Meters and most of 15 Meters seemed to be wall-to-wall Work All Germany contest stations, so I sidled on up to 12 Meters, which was open! I worked 2SZ, the special event station in London, PA1CC in the Netherlands and finally GB0GDS, a JOTA (Boy Scout Jamboree on the Air) station from Scotland.
So it was a good day and I enjoyed myself immensely, even though it was only about a 90 minute adventure. The best part was when a gusty breeze would blow, sending a cascade of leaves down. It was like being inside a snow globe of falling Autumn leaves. I am taking another vacation day from work next Friday, so if the weather is good .......
72 de Larry W2LJ
QRP - When you care to send the very least!
Larry Makoski, W2LJ, is a regular contributor to AmateurRadio.com and writes from New Jersey, USA. Contact him at [email protected].
Today’s Blog
Steve McDonald, VE7SL, is a regular contributor to AmateurRadio.com and writes from British Columbia, Canada. Contact him at [email protected].
Building …. ’29 – Style
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:
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].