K7DAA — Callsign Lookup by QRZ.COM

25 мая 2015 | Author: | No comments yet »

Member of. ARRL / AMSAT / (#13072) / FISTS (#15314) / Pigs (#2572) / NAQCC (#

Note: If you are in the Morgan Hill, San Gilroy or Hollister areas, stop by the K7DAA repeater sponsored by the Morgan Hill Radio Society (www.MHARS.org ). We two completely independent repeaters, with their own IRLP/Echolink

1). 147.33 MHz, with a kHz shift, and the PL is 103.5 Hz. Its EchoLink ID is or number 9537, and the IRLP number is 7588.

2). 442.975 with a +5 MHz shift, and the PL is 100 Hz. Its EchoLink ID is or number 9536, and the IRLP number is 7662.

The second is 100% solar-powered, and is a wide-area that covers most of the San Peninsula, from parts of San Francisco to as far south as parts of and Seaside. If you are attending a game at Park, you can easily raise the with a handheld on low power! repeaters can be linked together, as are during our weekly net at 9 PM Pacific every Wednesday. Please us via radio if you are local, or via EchoLink the K7DAA-R connection.

It’s a relaxed atmosphere, so feel to chat with anyone you find there! Although systems are fully capable of operation, remember that the majority of the time—it’s not an emergency!

The in the upper right corner shows three amateur operators! In addition to me, K7DAA, is my wife Dede, who decided to get a as close to her husband’s as possible—W7DAA! our younger son in the foreground, is now K7DRN. Eric is David Jr. our older who says he feels plenty of peer pressure to get his license and is planning to do so very soon! our golden retriever, would like you to know that he is licensed as well.

Ham radio has very good to me over the me with an enjoyable hobby, as as a springboard into a very professional life! I wish you and hope that you find it as fun and as I do! Please permit me to tell you a bit who I am, and what I am:

First, a bit of my ham history:

I up in West Covina, California, a of Los Angeles. With the help and of my elmer, Bob Howard (WA6DLI), I got my license (WN6SVQ) at age 10. Upgraded to class a year later. I let my license lapse while I was out of the working as a missionary in Brazil 1972 to late 1974. I got back, I studied up for a week, went down to the Long CA, FCC field office (no Volunteer program back then), my 13wpm code test, as as the General and Advanced written all in the same day. I received my new early 1975.

At the end of 2007 I to change my call from to K7DAA, since it fairly matches my initials, is much and more distinctive to shout at a DX (I think it’s worth an 3 dB over a 6 call!), and because lived on and off in 7 land.

My present QTH is at the southern edge of Valley. Morgan Hill is a pleasant town with a of about 35,000. It shares its border with the much city of San Jose, in southern Clara County, and is approximately by US Highway 101. We are about 75 south of San Francisco.

I was an Advanced ham for most of my adult life, finally decided to make the to Extra, mostly to get the additional 25 kHz CW on 80. 40, 20, and 15 meters—most of the good DX is down in the end of the band. I passed the Extra 4) test with a score of I also hold an FCC General license (was First until the FCC combined the First and together a few years back). I that test also—in That’s so long ago that I I used a slide rule for the

I worked for Apple Inc. for 9 as senior group manager of the Standards Architecture team. It was a bit working in Santa’s toy shop! We and developed the directions for Apple’s and wireless communications technologies get incorporated into Apple’s and desktop computers, as well as fun and interesting things! I retired Apple in late 2011.

If you haven’t tried a Roku box you really should! It is the future of video-over-IP, and presently has over 700 channels, along with the Netflix, Hulu, and other channels. Everything just in over your present to the Internet. unless you are still on (really??).

Anyway, I have RF in my blood, and my ham hobby has greatly and provided direction for my professional

I have 9 issued patents so with several more rattling around somewhere in the of the USPTO. Here are several or products of which I am the inventor:

The 300 MHz SAW circuit that allows all of us to and unlock our cars with keyfobs, or simply by pressing a on the key heads.

The infamous I’ve and I can’t get up! pendants that and the disabled might wear their necks to signal for as well as similar remote hand-held products (lots and of various types of these). of these are on 303.875 MHz. are also on 418 MHz.

The wireless systems used in, among places, the Paul Revere (a US historical landmark) in Boston, MA.

The of the 295 to 433.92 MHz wireless smoke PIR motion detectors, and glass-break used by many of us in our homes or

The Panasonic Gigarange series of 2.4 GHz phones—the first successful use (in of the ISM 2.4 GHz band by consumer-grade cordless products—a huge money-maker for Corporation. I, along with 3 guys (one of which is a ham!) designed a novel, spread-spectrum method, as well as the subsystems that gave product its amazing range and

The pop-out X-Jack 2.4 GHz antenna used by US Robotics and 3Com for wireless LAN and Bluetooth products.

Six assorted antenna and RF patents, for WLAN and Bluetooth products in use all the world today.

A number of coming as a result of my time that I can’t mention

I’m a member of IEEE and Propagation, Communications and Microwave and a past voting member of the 802.11 working group. My is on several of the 802.11 standards, 802.11n.

I also sat on the Board of of the Wi-Fi Alliance until the end of when I left Apple. the ones responsible for giving you all of fun Wi-Fi Internet stuff!

I was in developing the original Bluetooth and led one of the 9 original Bluetooth promoter while senior director of engineering at 3Com Corp when it was a force to be reckoned in the Ethernet and networking markets).

I also designed and built a of ham and commercial VHF and UHF repeaters, remote and Internet control systems. I and sold a small number of sophisticated 65C02-based talking and remote-base controllers for ham groups in the and early 90’s. This was repeater ID’s and other were commonly announced voice—something that’s pretty taken for granted now.

also written tech for 73 and Ham Radio magazines, as well as smaller-circulation ham newsletters.

I’m set up for most of the ham satellites, as well as CW, FM, PSK-31, RTTY, and just any digital mode on 1.8 through 450 For HF, I use Ham Radio Deluxe and DM-780 for the modes, along with a USB Plug-n-Play interface. For satellite I’m usually using one of my Pro laptops and MacDoppler. It can easily to both my FT-847 and my Az-El which uses the LVB Tracker’s USB

I try to keep abreast of new developments, and also enjoyed experimenting station remote control the Internet, VoIP, EchoLink,

When I get really frustrated my poor location and even antenna systems, I operate via a HF base in New Mexico. It’s fun to with differences in propagation Northern California and New Mexico, a of about 1000 miles of here. Using the Internet, able to operate this as well as my own home station, anywhere on the planet.


Yaesu FT-950 My most recent purchase. The filters and IF DSP make this a hot transceiver!

Elecraft K2 — a enjoyable QRP rig to build and operate. I the 100 watt option lid as well as the QRP (10 to 15 watts) configuration with the lead-acid battery option makes it a great portable QRP

Yaesu FT-847 — thru 70 cm transceiver. Great for satellite work. Wouldn’t with it. In some ways to the Kenwood TS-2000, in my humble especially with the Inrad 8 SSB filter installed in place of the IF filter.

Yaesu FT-8800R Very nice dual-band MHz radio. Full duplex and repeat. It works very The only think I don’t about this radio is its cryptic user interface. just something you have to then use. For antennas, I use a Ventenna stealth 146/440 on the roof, or I can also switch in a 3 element 2 meter quad in the that is pointed north. The of this beam allows me to be full quieting into the Alto N6NFI repeater on MHz.

Alinco DR-235 For 1.25 cm FM. Connects to a 4-element 223 MHz yagi in the attic that I to the rafters with nylon I built the yagi with 10 bare copper wire on a 26 inch wooden broomstick for a Total cost was about Also points north the majority of the Silicon Valley

A Kenwood TH-F6 HT. Very unit, and the only tri-band rig on the market that includes the 220 with a full 5 watts It’s my current favorite HT to around.

Kenwood TH-D72 HT A $500 does-everything radio APRS TNC and GPS built-in. Also full-duplex for FM satellite work.

A FT-60R HT — This is my radio of choice if I’m in emergency communications. Very and you can’t beat the fact it can run all day, with a full 5 output, on a set of standard AA-size batteries. Also probably the radio to program.

Yaesu — I just bought one for Dede to throw in her backpack she is working on her music degree at San State, but she’ll have to buy her own as I’m really hooked on tiny little radio! only 1.5 watts output on VHF and 1 on UHF, but that seems to be especially for use about Morgan with the K7DAA repeater the whole Garlic Valley. a very well-designed, cute unit that truly in a shirt pocket. The very of a portable radio in my opinion. By the this radio DOES DTMF, even though it not have a full-size DTMF pad. That was almost a for me until I found out how to do it.


LDG AT-1000Pro auto tuner handles the tuning for my stealthy antenna, and allows me to pump up to 1 KW it. You have to get used to the sound of baby tuning, though! It like someone dropping marbles on a steel box when searching for a match. I routinely get that noise?? questions anyone a room away my office/shack when it’s its thing. No matter—it works

LDG Z-11 Pro auto tuner—works a champ, even with a watt or two of drive! Added the AA batteries, put it in a plastic Tupperware and mounted it at the base of the downspout of my gutter system. This me to use coax feed directly to antenna, and is pretty stealthy.

T-1 QRP auto tuner—works great but much smaller than the LDG

MFJ-948 Versatuner II—some you just can’t beat a manual tuner!

Heil dual-element desktop mike

BY-1 Key

Palm Mini for portable keying. Tiny, and I like their feel. mine from Marshall Emm at He’s a great guy to deal

The cute little American KK-1 hand key, as as its brother, the Porta-Paddle (it rides in the glove box of my car for some mobile CW

Heathkit SB-220 — I the fact that it proclaims it’s a 2 KW Amp on its nameplate, even that’s from back in the when we all measured transmit by the DC input levels. So it’s 2 KW and about 1.4 KW OUTPUT. Plenty for my It was very well-constructed and lightly before I bought it on eBay. then, I’ve completely it with new electrolytic capacitors and all of the Harbach mods—low-voltage PTT, start, new fan, etc. I added a much beefier Dahl 1.3 Amp continuous-duty high-voltage for added OOMPH! Too bad I can’t use it here in this house, but I do use it on occasions (hopefully not when the are home)! Most of the time, I’m using 100 watts or Often it’s far less—note the QRP below.

I have also the K5OOR QRP amplifier kits: the 40 watt HF Packer and the 100 watt Pro amps.

Pacific Antennas mini vertical — little portable antenna!

MP-1 — neat vertical, and very well-made

YP-3 — a three-element yagi for 20 through 6 meters. is a great Field Day antenna, to say the It’s a very manageable without sacrificing much You can easily adjust it to any one band you in just a few minutes. Put it up 20 or more and you’ve got lots of contacts waiting to be made!

DX Engineering Hexbeam. Like the YP-3 it is able to be used for Field Day or outings. Great antenna also works well minimum elevation.

A couple of 1/4-wave aluminum verticals. I them (temporarily on some on a 1.25 inch 10-foot pipe I drove down the grass in the back yard. 10 inches of it protrudes from the making it both a good point, as well as the beginnings of a attachment point for the radials I out onto the grass.

High Sidekick — screwdriver with extended stinger at ground level. I’ve with it, but don’t routinely use it. It seem to be very efficient to my others (strictly in a non-mobile As time goes by, I’ll try different experiments with it and its big the HS-1800/Pro. Those of us that in CCR-land will try anything to get a signal out!

75 foot horizontal loop and about 5 to 15 ft high (a real Works on 40 meters and up. It’s enough that this is my permanent antenna that I to leave in place.

And sometimes, I get really desperate, I even my aluminum rain gutter on 40, 80 and too! Works surprisingly but fairly noisy on receive, and it the south and west—not great you live on the West Coast. at least Hawaii’s no problem!

also been experimenting very small HF loops with copper pipe. So I’ve been very with the results. I may mount a diameter model in the attic for 30 10 meters when I finish the remote tuning motor for its tuning capacitor. It’s efficient, and really gets out I had 5-watt 17 meter SSB contacts both the east coast and within 30 minutes on the first day I building it—mounted about 6 above ground! Both ops running 400-500 watts, and gave me 5-7 to 5-9 signal reports.

For work, I’m using a 11 element 436 MHz yagi, and another 6 element 2 meter yagi. antennas, but I’m working on them for circular polarization. Not pleased with the polarization I’m getting at times on and VO-52.

I’ve designed a 2.4 GHz helical feed (for that will soon be to an old Dish Network 18 reflector.

I made the change to high mobile operation in September Toyota Camry is now QRO, and really enjoying it!

www.ad5x.com/articles.htm and on the article near the top titled QSK Conversion. This mod works for the ALS-600 and ALS-500M. I did mine, and it great!

Little Tarheel HP power) screwdriver antenna the optional 56 inch whip. antenna.

Larsen 2M/440 antenna

Diamond K-400 lip mounts for both antennas

A brew interface that when the screwdriver antenna is adjusted, puts the Yaesu into 10-watt tuning temporarily disconnects the amplifier PTT and holds the tune mode for 2 seconds after you release the up/down switch, allowing the to be quickly adjusted for lowest SWR worries about accidentally 400-500 watts into it tuning (I only did this 4 times in one day before I decided to this interface!)

And in our other two we have the Yaesu FT-7800R and These are good, solid, dual band 146/440 MHz and they are just about except for the power button. We a 7800 installed in my wife’s Toyota Sequoia SUV, and the installed in Eric’s (K7DRN) Avalon.

OHR-500, as well as the fine digital dial, and the excellent analog QRP wattmeter, all from at MorseX.com .

Elecraft KX1—Neat handheld QRP rig that puts out 1.5 to 4 watts on 80, 40, 30 and 20 meters.

Yaesu — Excellent portable all-band rig. Great for QRP and QSO’s. I think that radio is almost perfect, its size. I find it amazing Yaesu managed to pack so features into such a rig. I might buy another for portable operation on the SSB/CW I think I’ll need to another arm to do this effectively, to hold the Arrow antenna at the one to tune the receiver, and another to the transmitter for doppler compensation. Oh, guess I’ll need a arm to hold and key the mike! I’ll to think a bit more about first.

It also seems I have a growing number of QRP homebrew transceivers popping up in the and on the workbench. This is definitely a fun of the ham radio experience. Nothing building your own gear and thrilled to see it working! These are of the kits I’ve been lately:

Rock-Mite 500 mW fixed-frequency conversion transceivers for 20, 30, and 40 meters Small Wonder Labs

neat little ATS-3B. A 5 watt CW rig that fits in an tin!

The Small Wonder — it’s a tunable 40 2.5 Watt CW transceiver: Link to SW+

The PFR-3 portable, trail-friendly, transceiver from Doug at:

BitX20A 20 meter CW/SSB also from Doug at: BitX20A page

I’m on building the MMR-40 right QRPKits MMR-40 page

The QRP club’s 2N2 family for 40, 30 and 20 meters

For the W8DIZ has some great radio modules that you can together in various ways.


My challenge these days, ham is to find a decent enough HF system to satisfy my need for DX, the confines of my typical postage-stamp Bay lot and a handful of neighborhood CCR’s.

Any of you on large lots with of open space for your should definitely understand my and admiration!

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