AmateurRadio.com

I’m afraid we still don’t have the antenna up, but things are looking good to get it done next week. I have lots of stuff to post regarding this project, but that will have to wait until I have more time. In the meantime, here is my son’s account of what we did on Tuesday of this week:

Helping Dad Build His Antenna, Day 2
by Antonio Mitchell, Thursday, October 13, 2011

On Tuesday we began our official work. Dad bought his parts that were on his shopping list and also a titanium drill bit. We kept getting a step closer to finishing our project with each thing we did. It felt good to be getting the project done.

When Dad came home from his shopping trip we began to get ready to go onto the roof. The bolts for [one of] the tripod’s feet were put on, and also the ladder was brought out. We had a bucket which Dad tied some knots to. The bucket was to put things in that would help us put up the tripods. In the bucket were bolts, drill, level, roofing compound, and tape measures. My dad hauled up the first tripod using a rope. Then after that came the bucket.

Once everything was on the roof we set the tripods on each end of the house. We started with the smaller tripod. I made sure it was level and Dad drilled the holes.Once the holes were drilled we spread roofing compound. I helped put the tripod back, while Dad screwed the bolts in. We did the same for the other tripod as well.

After the tripods were on the roof we finished working on the mast. The titanium bit really worked well. It took us till supper-time to finish the tripod and the mast. My dad’s back wasn’t doing well so we did not get to put the mast on the roof. Hopefully soon.

According to a report from the ARRL, the number of Amateur Radio operators in the U.S. has grown over the past 12 years. From 677,000 in 1999 to a new all time high of 700,000 operators in 2011 according to ARRL VEC Manager Maria Somma, AB1FM. 

A chart showing the number of licensed Hams for the past 12 years. Courtesy of ARRL

“At the end of September, I saw that the number of hams in the US was high,” she said. “When I started comparing that number with other years, I found that it was an all-time high.” Over the past 40 years, the number of Hams has been growing. In December, 1971 there were 285,000 Ham Radio operators, and the numbers increased dramatically. After another decade, in 1981, 443,000 Hams in the US. That’s a little under a 50% increase. And as the decades rolled on, the number of Hams grew still.

In the report, Somma went on to say,

“When looking at the three current license classes — Technician, General and Amateur Extra — these numbers are impressive,” Somma explained. “The number of Technicians peaked in March 2011 at 342,572, while in September 2011, we saw both Generals and Extras peak at 159,861 and 125,661, respectively. As new Technicians earn their Amateur Radio licenses, and current Technician licensees move on to General and Generals upgrade to Extra, this can cause up-and-down fluctuations for these totals.”

The question then turns to how many of these licensed Hams are still active. In a recent ARRL survey of members, more than 80% of the respondents are active. That’s still an impressive number. Somma continued to say these high numbers mean that hams are upgrading and renewing in larger numbers and staying interested in hobby. “As technology changes and advances, it is especially vital to keep up or be at the forefront,” Somma said. “I believe that Amateur Radio has done just that! The measurable results are our indisputable license numbers. It amazes me after all these years how important and relevant Amateur Radio remains. I am proud to be one of the 700,221 licensees and to see this historic and important milestone.”

73.

Rich also writes a Tech blog and posts stories every Tuesday and Thursday on Q103, Albany’s #1 Rock Station website, as well as Amateur Radio stories every Monday thru Friday on AmiZed Studios and hosts a podcast called The Kim & Rich Show with his fiance’ Kim Dunne.

I’ve picked up a couple of Mirage “brick” amplifiers over the past few years.   I’ve also rewired the DC cable on each and every one.  Here’s the latest.  AWG 10 to AWG 16 transition?  Seriously?  I know it technically doesn’t matter too much for a short run, but these amplifiers suck down a lot of current and I just don’t see cutting corners on that.  Maybe I’m a purist…

Fire up your sat tracking software, because the ISS will be live for Jamboree on The Air. An article at Southgate Amateur Radio Club’s website reports that Astronaut Mike Fossum, KF5AQG, will be participating in Jamboree on The Air from the International Space station this weekend, using the callsign NA1SS. Mike is also a scout master. 

Photo Courtesy of NASA / Southgate ARC

While he won’t be available for every pass, you may hear him from 0800-1930 UTC as this is the usual work time for the crew, but they could also stay on a little later as well. When Mike is on he will be working ITU 1, which is Europe, Africa and Russia, with the uplink of 145.200 MHz FM and ITU regions 2 & 3, which is every one else, using the uplink of 144.49 MHz. Downlown for all will be 145.800 MHz FM. Be sure to be using a wide filter if your radio supports it, as the station uses a 5 Khz FM deviation, so 25 khz channel spacing is recommended.

If you don’t have satellite tracking software installed, you can track the Space Station online at NASA’s Spaceflight website. And, AMSAT UK has a wonderful article on getting started with satellites as well. This is should a fun Jamboree this year. To all the scouts and scout masters, enjoy!

73.

Rich also writes a Tech blog and posts stories every Tuesday and Thursday on Q103, Albany’s #1 Rock Station website, as well as Amateur Radio stories every Monday thru Friday on AmiZed Studios and hosts a podcast called The Kim & Rich Show with his fiance’ Kim Dunne.

I do not spend a lot of time on VHF/UHF FM and have not for many years.  My first radio in 1993 was an Alinco DJ-580T handheld and I’ve thought at various times that a new handheld might suit me well, especially for receiving.  A few weeks ago, as I tend to, I came across a Yaesu VX-3R offered “for parts or repair” on attractive terms and so acquired it—my second handheld ever.  The problem seemed straightforward enough:  full TX power, but no RX on amateur bands.  RX on FM broadcast OK.  The seller assured me, after I had agreed to purchase based on his description, that “somebody” had told him that this problem occurs when “only one component is bad.”

Based on the seller’s description of the problem and a thorough reading of the Technical Supplement, I developed a short list of candidate failure modes, components, and sources.  Fortunately, all of the components could be sourced easily from the usual sources.

When the radio arrived, I gave it a functional check and it indeed exhibited the problem that the seller had advertised.  I quickly popped it open and noticed a small red sticker in the lower right-hand (when facing the device like you would operate it) corner of the Main Unit (Side A, per the Technical Supplement’s notation).  A neatly hand-drawn arrow pointed to component Q1025, which upon closer inspection, was clearly damaged.

So, I quickly set about identifying the component and procuring a replacement.  It was a NJU7007F3 operational amplifier.  Huh…it did not contribute to any of the failure modes I had initially suspected.  However, a careful reading of the Technical Supplement indicated that this op amp drives varactor diodes in a tracking preselector—so, if it does not work, the radio will exhibit varying degrees of deafness in the amateur bands.  I found out later that the “somebody” was actually a Yaesu technician who had seen the radio for repair at the behest of a previous owner and left the sticker for me.  At any rate, this component clearly would have to be replaced if I were to fix the radio, so I set about looking for a source.

Mouser listed it in their catalog but wanted me to buy a reel of 3000.  No thanks.  At least they had it listed.  So, I did the next most logical thing—I made a list of other parts that I needed and called Yaesu.  The part was back-ordered to Japan for 4-6 weeks, but only cost 0.42 USD.  I bought three.

After however many weeks it has been, a package from Yaesu showed up on my doorstep tonight.  After repairing a damaged PCB trace (non trivial on something this small), I was able to replace it.  The little black speck in the middle of this photograph is the removed component.  For my non-US readers, the US 0.01 USD coin (“Penny”) is about 19 mm in diameter.

The radio fired right up and received NOAA/NWS right away.  The entire repair once I had the parts was about 30 minutes.  There are still two unbuilt SoftRock kits, an IC-290A with an unlocking PLL, and W1GHZ transverters for 903 and 1296 to be worked on…maybe tomorrow…