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K4AXF USA flag USA

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Ten-Tec Model 260 power supplyTen-Tec Corsair Model 560 HF transceiver
 

 

ATTN CW OPS: THE SUNRISE NET ON 7123 KHZ AT 1300Z DAILY - DROP IN AND JOIN US FOR FUN AND FELLOWSHIP

 

My name is Jim and I first caught the radio bug when I got a Rocket Radio, a little crystal set built into a red and white plastic rocket ship. It tuned by position of a rod which slid in and out of the nosecone. I spent many wonderful hours listening to the "Joy Boys of Radio" show with Willard Scott and Ed Walker, their humerous patter and the great daily skit, "As the Worm Turns - brought to you by Stop No More". Later in the evening was Felix Grant with his jazz program "The Album Sound". Terrific radio entertainment that continued to the last days of that golden era.

My interest in shortwave radio began when I discovered a Zenith Transoceanic radio in an upstairs storage closet. It had been presented to my Dad when he left Korea. I began punching different bands buttons and tuning around. Wow! I heard all kinds of really neat stuff - including ham radio operators. I was hooked! And the obsession has never let up.

Zenith Transoceanic

I got my Conditional Class license in late 1962 at age 14, while living in Germany. The CW part was easy, because, for months I'd been "bootlegging" CW QSOs using the station and callsign belonging to my friend, andfellow teenage ham,Bill. With this license in hand, I was issued a DL4- callsign. For the next two years I was active on 40-meter CW from Stuttgart, Germany where my first setup was a 40-meter dipole, my Dad's Zenith Transoceanic(I tuned a transistor SW radio up/down 455 KHz to act as a BFO) and Johnson Challenger transmitter, on loan from Bill, DL4WS/K4ZVT, who lived across the street. Just up the street was yet another teenage ham, Jim WA6SCK /DL4HG (now K4RGR). These two guys were my ham radio mentors.

Within a few months I had my own rig, an Eico 723 and Hallicrafters SX-110. Upon returning to the states in 1964 the family moved from Maryland to Virginia at which time the FCC assigned me my current callsign. I've been an active SWL/Ham ever since. I upgraded to Extra class sometime in the mid-1970's. Over the years I've had a lot of different equipment in my shack - for me, getting to know new gear is half the fun.

_ . . . _

 

 

MY CURRENT STATION

 

My current station includes:

Grundig Satellit 500

Ten-Tec Corsair Model 560 HF transceiver

LDG AT-100Pro auto antenna tuner

Ten-Tec Model 260 power supply

Vibrokeyer single-lever paddle

E.F. Johnson Speed-X bug 

Hi-Mound HK-706 straight key

Homebrew electronic keyer

 

I operate mostly low power, 50-watts or less - often QRP which is 5 watts and under. It's amazing how little power is necessary on CW. I've even worked 44 states using 0.8 watts or less. My favorite activities are QRP Fox Hunts (www.qrpfoxhunt.org), Straight Key Century Club events (www.skccgroup.com), shortwave listening, and the Sunrise Net where I serve as Net Control/Host on Friday mornings (www.qsl.net/srn).

_ . . . _

More about my current equipment lineup . . .

The "Cool Blue" Corsair
 
Ten-Tec Model 560 Corsair  My favorite rig of all time is the Ten-Tec Corsair, a vintage 1982 rig with 85-100 watt output CW-SSB, covering the HF amateur bands, 160-10m, including 30, 17, and 12m. It has an 8-pole, 2.4 KHz crystal filter in the 1st IF. In the 2nd IF are 2.4 KHz, 1.8 KHz, 500 Hz, and 250 Hz crystal filters, yielding 12-16 poles of filtering. Many mods, including; ALC mod to allow adjustment of transmit power down to 0.5 watts, mod to silence amp relay, TX audio improvement mod, replaced LED display with backlit LCD display, and replaced PTO with direct digital synthesizer. The Corsair's receiver is outstanding, very sharp and sensitive for CW and very nice-sounding on SSB. Superbly crafted and undeniably beautiful, the Corsair has got to be the coolest rig ever!

_ . . . _

 

Grundig Satellit 500

 

Grundig Satellit 500 I recently acquired this beauty and have am thoroughly enjoying the quality and performance of this genuine Grundig.  The sound of this receiver is nothing short of excellent and shortwave performance is excellent.  Listening to foreign broadcasts and HF air traffic control is great.  It's also great for listening to ham radio stations on SSB.  The AMers on 7295 khz sound terrific on this receiver.  As you may be aware, the Chinese company that makes Kaito, Tecsun, and Eton radios acquired the Grundig name a while back and sells radios under that name.  These are fine radios - I own a Tecsun PL-880 - don't quite measure up to German Grundig's quality and performance. 

 

_ . . . _

 

In March 2010 my wife Pam, KA4EWG, and I moved to our retirement home just outside Grottoes, VA. We're in a no-antenna community; nevertheless, I put up a "stealth" 80-10 meter G5RV dipole in the trees at the edge of the woods behind our house. The antenna is impossible to see from the street and even very difficult to spot, up close. I used black-jacketed #18 stranded wire and painted the end and center insulators with OD camouflage paint. The 60-foot run of coax is buried from the tree to the back of the house.

For shortwave listening I connect my SWL receivers to the metal soffits/eaves. I used external tooth star washers at all overlaps in the sheet metal to ensure good connection all the way around the house. I've even made a couple of contacts on low power using this "antenna".

 

BTW, Pam built that wall out of rocks collected in, and dug out of, the yard. She stacked 50 per day over three summers. It's now comprised of over 11,500 rocks.

_ . . . _

Pam and I were active from the Virginia suburbs of Washington, DC, from 1964 to 2001 and now live in the Shenandoah Valley with our Shetland Sheepdog, Shadow, and Sheltie-Corgi mix, Ginger.  We adpted Shadow and Ginger from Northern Virginia Sheltie Rescue, see http://www.nvsr.org.  That's us in the picture below.  

 

_ . . . _

 

HOMEBREW

In 2002-2003, I built a six-tube regen receiver based on a series of articles written by Bruce Vaughan, NR5Q (now SK), which appeared in Electric Radio Magazine. I included a Select-o-Ject circuit from the 1964 ARRL Handbook to help sort out signals. The resulting receiver, built in two cabinets, is shown above. Using this receiver with a Johnson Adventurer transmitter, I had hundreds and hundreds of enjoyable CW ragchews on 40 and 80m. This receiver now resides in the antique radio collection of Ron Lawrence W4RON and is featured on his website:
http://radioheaven.homestead.com.
http://radioheaven.homestead.com/NRQ-62_The_Ultimate_Regen.html

Two more of my more photogenic homebrew projects: Mini-Mountaineer (photo by Alan Walters), a 40-meter, 750 mw CW transceiver adapted from a Wes Hayward W7ZOI design . . .

Photo:  Alan Waltersregenerative receiver, 2-tubes, 2-13 MHz

. . . and my first homebrew regenerative receiver, comprised of two dual-triode tubes. I got the circuit from Secrets of Homebuilt Regenerative Receivers,by C.F. Rockey. Coverage: 3-20 MHz.

_ . . . _
 
Corsair Modifications
 
After the original LED frequency display bit the dust, I searched around for a replacement and found the Almost All Digital Electronics (AADE) site where several replacement display options were available. I chose the blue backlit display and found installation to be easy and quick. Some metal work was required, but my Dremel cut-off tool did the trick.

The VFO in my Corsair was drifty. While not a problem in normal operation, during my 2-hour plus stint as Friday morning net control station for the Sunrise Net, the rig would drift 300 to 400 Hz, much to the amusement of the fellows on the Net. So, rather than send the rig to Ten-Tec for tweaking, I opted to spend the money on replacing the archaic PTO with a direct digital synthesize VFO. The N4YG DDS VFO looked like the best bet and the installation turned out to be well within my technical abilities. The result has been outstanding. Now I have very good stability, readout to 10 Hz, A/B VFO, and split-frequency capability.
 
The first picture shows the digital encoder mounted under the display/DDS housing. The encoder shaft goes to a 1/4" to 3/16" shaft-reducer and through the front panel to the VFO knob. I used the tuning shaft from the old PTO to go to the knob and I made the mounting bracket from the covers off the old PTO.  
 
In the second picture below you can see the DDS board to the rear of the U-shaped subchassis and the digital display assembly right behind the front panel. The size of the display requried that I move the status LED driver board from the front panel to the side of the enclosure. 
 
 
I have since added a cover to the u-shaped subchassis for shielding.
_ . . . _
 
Over the almost 52 years I've been on the air, I've owned quite a variety of rigs.  My fondest memories are of the Johnson Navigator/SP600 setup I had as a high-schooler.  I had many enjoyable hours shortwave listening using several outstanding receivers, notably the Hammarlund SP-600 and HQ-120 and the Collins 51S1.  
 

My special little guy, Teddy, 2001-2013

R.I.P.

 
 
73, Jim

 

1133290 Last modified: 2014-07-27 15:24:40, 28017 bytes

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