AmateurRadio.com

The Model One has been a huge success. But in many ways it is a daring retro design judging from all the features that are missing in this radio. I am thinking of features such as a customizable equalizer, a digital display, and memory presets. It just has a plain old analog tuning dial for FM and AM.

The radio could as far as I can tell just as well have been made in the 70’s except for some of the IC’s which are used. Actually it is easy to see the similarity with the even older KLH Model 18 from the 60’s, and yes – Henry Kloss played a role in both radio designs. But that makes for easy repairs, such as a seemingly common fault in the FM tuning capacitor, which over time may develop contact problems.

The radio is in many respects exceptionally well made. The tuning dial has a quality vernier drive. The audio section is well built with a powerful amplifier, a strong magnet for the loudspeaker, and a bass port design for the wooden cabinet. All are factors which contribute to its reputation for good audio. If one can trust measurements on the web, it has been equalized for enhanced bass and treble with the mid’s some 6 dB down. These are well-known tricks for getting a warm and crisp sound with universal appeal. Internally the tuner section, which is built around the TEA5711T chip, is well shielded for frequency stability as seen in image 2.

One weakness which manifested itself after only 3-4 years in this particular radio is that it became hard to tune, scratchy, and unstable on FM due to intermittent contacts in the tuning capacitor. According to the TEA5711T datasheet it is a varicon which for AM has 140/82 pF, for FM 2 x 20 pF, and for trimmers 4 x 8 pF. This particular unit had a Mitsumi varicon. Some say, when this fault occurs, that the varicon must be replaced and others say it can be cleaned. Who do you think I sided with?

Disassembling the radio is quite straightforward if you are used to this kind of work. The tuner is enclosed in shielding on both sides of the PCB. The shields can carefully be desoldered as shown in image 3. That exposes the varicon, and its plastic casing can be lifted as shown in the last image.

I sprayed it with contact spray and the radio came back to life. The only problem was that the tuning on FM had shifted so that a station on 100 MHz now appeared on 107 MHz. A little detective work around the circuit showed which trimmer that was for the FM oscillator and which one that was for the FM RF circuit (marked O and R in image 2). Since the oscillator trimmer was set for its maximum capacitance with the plates covering each other, it was easy to reduce the value and get the FM dial back to normal again, and then to peak the RF trimmer.

It got me wondering though to see that it had been necessary in the first place to have the oscillator trimmer set at its maximum value. It was just as if the tuning capacitor never had had its full value, even in the factory, and that it finally got it after my cleaning.

Sverre Holm, LA3ZA, is a regular contributor to AmateurRadio.com and writes from Norway. Contact him at [email protected].

As we move past the peak of this current solar cycle it seems that we are enjoying some of the best conditions on the high bands in several years. However, there does seem to be a sense of urgency to enjoy 10 meter DX since these conditions will likely last a few weeks rather than a year or two as in past cycles. I remember when I received my Novice license in 1989 that 10 meters was so busy you could hardly find a spot to call CQ in the Novice band, 28.300 - 28.500.

Since the flux has been in the 160 -170 range lately, last week's 10 meter contest was full of activity. It was a great opportunity for me to increase my QRP DXCC count which was at 160 entities worked going into the weekend. The bottom line, with the exception of V55V on SSB, I was able to work everyone I chased. It was harder work that I thought it would be, which is a testament to how busy the band was.

So with the band hopping, I fired up the KX3 and went hunting. I was able to work TK5EP, 4O3A, OX3XR on CW and ZS1TMJ on SSB. It was Saturday morning when I made these QSO's, so it was still early in the contest, I'm sure on Sunday, these stations would have been a little easier to work. I picked up four new counters on 10m and threw in FG5FR on 15m to get my QRP DXCC to 165. It was a fun weekend and it's good to hear some much activity on 10m.

So, go have a look at 10 meters, better yet, call CQ. You mght be surprised who comes back.
Mike Crownover, AD5A, is a regular contributor to AmateurRadio.com and writes from Texas, USA. Contact him at [email protected].

AmateurLogic.TV Episode 61 is now available for download.

It’s the AmateurLogic Christmas Spectacular. Join the crew and special guest for a festive holiday event.

Peter hacks his Degen SW Receiver. Tommy puts the Arduino on TV. George trudges on in his effort to use the Raspberry Pi as an Echolink node. And a hilarious look at the 2013 ALTV Holiday Gift Guide.

A 1:13:08 AmateurLogic celebration of the season and other good stuff.

Download

View in web browser: YouTube

George Thomas, W5JDX, is co-host of AmateurLogic.TV, an original amateur radio video program hosted by George Thomas (W5JDX), Tommy Martin (N5ZNO), Peter Berrett (VK3PB), and Emile Diodene (KE5QKR). Contact him at [email protected].

It seems to have evolved that the time I think of doing some DSTAR operating is when I’m out in the garden on a Sunday morning doing whatever chores are possible or needed (possible relates to the winter weather!). This morning, I popped out to clean out the henhouse for the girls and booted up the Raspberry Pi and DVAP.  Happily it came up straightaway, which isn’t always the case and I ventured out.

As usual, there were some nice QSOs to be had; Tom AA8RT in Dallas, talking about the winter storm they’d had last week, Ian VK6SKY who, at the other end of the temperature scale was having a really hot summer with over 40C. Another really nice QSO was with John LA2QAA on Frei Island.

John is kind enough to read this blog (hello John!) and it was interesting to talk to him about some of his satellite experiences, as a control station for Oscar-7 as well as how difficult it is to use the SO-50 satellite from his high latitude.

After I’d finished the nice QSO with John, it just came onto rain, so I finished off freshening the henhouse and ventured in.

I took the opportunity to update the G4KLX ircDDBGateway and DVAPNode software on my Raspberry Pi to the latest versions (20131001 and 20130904 respectively) as it was a little while since I’d done that.

Tim Kirby, G4VXE, is a regular contributor to AmateurRadio.com and writes from Oxfordshire, England. Contact him at [email protected].

Series Six Episode Twenty-Five of the ICQ Amateur / Ham Radio Podcast has been released. The latest news and Martin reviews which digital mode to use.

• Summits on the Air revitalised by involvement from "Down Under"
• Comet ISON disintegrates, no lives!
• GB3EB new Eastbourne 2m VHF repeater
• Kerry Amateur Radio Group repeater move
• New VK6RIO beacon on 144.950 MHz to beam at South Africa
• Latvian Special Prefix
• December is Ham Radio YOTA month!
• VHF Communications magazine closes
• Radio microphones changes in NZ
• Vandalism at Australian amateur radio club
• ARRL granted use of W100AW for League’s centennial
• RSGB IET Lectures available
• Could you write software for IOTA?

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

Series Six Episode Twenty-Five of the ICQ Amateur / Ham Radio Podcast has been released. The latest news and Martin reviews which digital mode to use.

• Summits on the Air revitalised by involvement from "Down Under"
• Comet ISON disintegrates, no lives!
• GB3EB new Eastbourne 2m VHF repeater
• Kerry Amateur Radio Group repeater move
• New VK6RIO beacon on 144.950 MHz to beam at South Africa
• Latvian Special Prefix
• December is Ham Radio YOTA month!
• VHF Communications magazine closes
• Radio microphones changes in NZ
• Vandalism at Australian amateur radio club
• ARRL granted use of W100AW for League’s centennial
• RSGB IET Lectures available
• Could you write software for IOTA?

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

Christmas Eve dawned, bright and sunny. George and Davy took the money that the club had donated, and went out to buy gifts for the adults that would be attending the Christmas Eve dinner at the soup kitchen. They bought nothing extravagant. But they did come back with plenty of toiletries, warm socks, hats and pairs of gloves, some cosmetics for the women. All basic necessities that a lot of these people could not afford to buy for themselves.

Donna started her day by visiting the Church. She knelt down and prayed before the manger scene that had been set up, “Lord, today is Christmas Eve, and tonight we’re going to try and take care of some of the least of your people.  You know what I had planned and You also know what happened to those plans.  I’m really worried about tonight, Lord.  I know that Jason, Davy and his radio friends have promised to help, but I am worried that not having done anything like this before, that they’re in way over their heads. I am worried there will not be enough, and that these folks will come and be disappointed.  But I am going to lay this before you, Lord.  I trust that You will bring it all to a good end, but I could sure use a Christmas miracle”

The day flew by quickly, and Davy, Jason and Jimmy met Donna and Maria at the soup kitchen at 2:00 PM sharp. They began warming up the food that was to be served that evening.  On the menu was a traditional Christmas dinner of roasted turkey (donated by a local restaurant – the owner was a close friend of Chuck  WB2MSV)  along with sweet potatoes, dressing, cranberry sauce, peas and carrots, pumpkin and apple pies and ice cream.

“So Jason, where are all these helpers you promised?” Donna asked.

Davy answered for his father. “Don’t worry Mrs. Pescarelli, they’ll all be here.”

Then as if on cue, a caravan of car after car after car pulled into the parking lot. Hams, their wives and their children came, bearing cookies, desserts, toys for the kids, and coats – warm winter coats. Another one of Chuck’s friends from a local thrift shop had provided donated coats for kids, coats for adults…coats for anyone who needed one. Some of the coats were never used and still had their store tags on them.  Donna was overwhelmed by the outpouring of generosity. By the time everything was collected to be handed out, she realized that she now had two or three times the amount that was stolen.

True to fashion, the Radio Amateurs jumped in and took over. Not only did they help to finish setting up,  but they rolled up their sleeves and stayed to help to with preparing the food. They welcomed the guests and served dinner. Afterwards, yet another TCARC club member, Charlie N2LHD, came dressed as Santa, and handed out the toys to the kids. There were enough presents so that each child got not just one, but two or three things that were on their lists. In addition, the Ham’s wives, or XYLs, as they were affectionately known, went to each adult and handed out bags containing home made cookies, socks, toiletries, and other personal items. Anyone who needed or wanted a new coat, hat, or gloves was welcomed to a side room where they could pick out their size from the donated items.

For several hours, there was merriment and joy in the air as food was eaten, gifts were opened, fellowship was enjoyed and Christmas Carols were sung. As the St. Nicholas Soup Kitchen Christmas party was winding down, Donna went up to Santa to thank him.

“Don’t thank me, Ma’am” Charlie explained. “If anyone deserves thanks, it’s George, Davy and Jimmy, and our Club President, Chuck Phillips.  They are the ones who pulled this off.”

Chuck WB2MSV started talking with Donna, “You see Ma’am, we Hams have a favorite saying that we’re ready for “When all else fails.” George, Davy and Jimmy explained your situation to us at our last club meeting, and it sure looked to us like you had a real emergency on your hands. Well, we Hams seem to do our best when the chips are down, and we weren’t about to stand by when you needed help the most. We might not have been responding to a blackout or a storm, but the chance to save Christmas for a bunch of good folks was more than we could pass up. And besides, isn’t this the time of year for giving?”

Donna answered by giving Chuck, Charlie, Jason, George, Davy and Jimmy a great big hug. “You are all wonderful in my book. When we were robbed, it really threw me.  I just about lost all my faith that people would still do good things these days. But I took Jason’s advice and said a prayer to ask God for a Christmas miracle. It looks like He gave me one, along with a bunch of Christmas radio angels,  And believe me, both I and these people sorely needed you. God bless you all .. and Merry Christmas!”

As they were leaving the building and heading for home, a light snow began to fall.  As they were walking to their car, Jason looked at Davy and said, “C’mon over here, Bud”.

“What’s up, Dad?” Davy asked.

His father gave him a big hug. “You’re not too old for one of these from your Old Man, are you?”

“Never, Dad” Davy replied, grinning.

“Davy, I just want you to know how proud of you I am. You’re turning into quite the young man.”

“Thanks, Dad. Merry Christmas. Let’s go home”.

“Sounds good to me. Merry Christmas, Davy”

The End

Author’s Note – some of the names and some of the call signs used in this story are actual names and calls of some of the finest Hams I have had the privilege to know, and who are now Silent Keys. One or two of the calls may have been re-issued through the Vanity Call Sign Program, but being remembered here in a special way are the original holders:

Chuck Phillips WB2MSV
Charlie Laterra N2LHD
Mark Rosenwald N2EBA
Julius Kardos WV2O
George Miller K2FD
Norm Bendel KB2SBB

These gentlemen listed above were selfless to a fault and would give you the shirt off  their backs, if they saw the need. Had the circumstances of this story been real, these gentlemen would have been first in line to lend a helping hand.

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].