QRP and Home Brews presentation at the 2008 W.V.A.R.A. HAMFEST March 8, 2008 .


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QRP and Home Brews presentation at the 2008 W.V.A.R.A. HAMFEST March 8, 2008. John Swez KC9JPZ. URL for download of this Presentation newton.indstate.edu/swez. This talk consists of four parts. An introduction to QRP An introduction to the speaker
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Slide 1

QRP and Home Brews presentation at the 2008 W.V.A.R.A. HAMFEST March 8, 2008 John Swez KC9JPZ URL for download of this Presentation newton.indstate.edu/swez

Slide 2

This discussion comprises of four sections A prologue to QRP A prologue to the speaker The RAMSEY 40 meter low power unit and testing Small Magnet Noise Reduction Antenna and testing

Slide 3

January 24 th on eHam.net So Now You\'re HF-Active KE5FRF urges you to even now learn Morse Code. So Now You\'re HF-Active Reply by WA0ZZG on January 18, 2007 Mail this to a companion! The previous winter, on a night that was beneath zero, I was tuning around 40 meters on a little QRP CW fix. Found a moderate station, not extremely solid, calling CQ. I did a reversal to him. Spoken for around 45 minutes to a more established respectable man from Atlanta. I liked reaching just four watts, so I let him know how much power I was running. He totally emptied my inflatable by returning and letting me know "that\'s OK I am running one half watt." Dave WA0ZZG To be named QRP your energy level must not surpass 5 watts yield when transmitting a CW flag.

Slide 4

"Obtained From" New Jersey QRP Club http://www.njqrp.org/whyqrp/2.htm

Slide 5

One of the main Commandments of QRPing K.I.S.S. Utilize a straightforward dipole up in the tree Reference: Same article as past slide Look! In the event that you just got a couple of watts, ensure it gets up into the sky! Most QRP QSOs are CW QSOs (we will discuss QRP Math later

Slide 6

Another Introduction to QRP from a notable HAM "Welcome to the domain of QRP, a place where less RF power is more diversion for the administrator! As a rule, QRP administrators utilize gear that weighs less, consumes up less room, costs less and is less reliant on air conditioning power than the regular ham station of 50 watts or more. Consequently, QRP devotees get flexibility - opportunity to convey a total station, with frill and radio wire, in an attaché. A run of the mill QRP station is sufficiently little to bring in the midst of some recreation in an auto brimming with family, via air or exploring. Your QRP station can work from batteries for long stretches when the power falls flat, or uncertainly from strange power sources, for example, private hydroelectric, wind or sun based power frameworks. Flexibility is satisfying, however better still is the feeling of achievement that originates from working hardware you assembled yourself. You may best love the inclination when that first CQ from your home-manufactured transmitter is replied - or the way a grin takes onto your face when that 1-KW station gives your 1-W transmitter a 599 report." - Dave Sumner, K1ZZ -

Slide 7

"What spurs the low-control (QRP) novice administrator? This question does not have a straightforward reply. An immense number of QRPers are "turned on" by the relative straightforwardness of most home-made QRP hardware. Straightforward apparatus is anything but difficult to develop and work, as well as it is genuinely modest to assemble. This has an exceptional engage the individuals who need specialized foundations and have yet to build up their abilities. Besides, a large number of distributed QRP circuits might be amassed on a PC (printed circuit) board that is accessible via mail from at least one PC-board sellers. The parts-arrangement control for a given venture is by and large distributed in the related article. Mystery is along these lines wiped out generally." "Different novices can plan their own particular circuits. QRP gear offers a transient practice in the workshop in light of the fact that a large number of the tasks are basic. This empowers an experimenter to attempt new circuits in a night or inside several days. He can attempt new thoughts and get quick results 1 . He may keep on working with his new circuit until it is idealized at which time a last model can be manufactured, housed in a bureau and utilized as a part of his station." 1 I (KC9JPZ) suggest Experimental Methods in RF Design - by Wes Hayward, W7ZOI, Rick Campbell, KK7B, and Bob Larkin, W7PUA distributed by ARRL It makes planning a snap. From VE6BPR\'s Home Page http://www.qsl.net/ve6bpr/About QRPer\'s

Slide 8

"Different QRPers are caught by the sentimentality that takes them back to the beginning of Amateur Radio, when hams, through need, utilized just a couple of watts of RF power for imparting. At the end of the day, they needed to do things the most difficult way possible. Each fruitful QSO was logged as an accomplishment! Pride went with home-made rigging and the capacity to be heard at incredible separations. When all is said in done, QRPers are an exceptional type of well disposed administrators. You have much to pick up by getting required in this developing movement." - Doug DeMaw, W1FB - In 1954 I was authorized as W3HUK. I got a contingent class permit since in those days you needed to go to a city with a FCC inspector. My composed and 13 wpm code test was given to me from my cousin W3OAQ. My hardware comprised of a Hallicrafters SX28A recipient (Super Sky-Rider) and a Heathkit DX 35 transmitter. Despite the fact that my 6146 last intensifier was fit for 65 Watts I more often than not ran 50 Watts contribution to the last stage. I manufactured the Heathkit DX 35 as a unit by sparing a great deal of hard earned tasks cash while living on a ranch in Union Dale, PA. I first constructed a power supply starting with no outside help as my first practice in welding. I recollect the first occasion when I turned it on "the plates gleamed red". My cousin when quickly after observing this instructed me to "close it off!" He later found an extinguished Pi arrange capacitor since I had chosen too low of a voltage! Hello there Hi! I improved the DX-35. I gathered the entire thing yet it didn\'t work. No RF yield. In any case, the main misstep I made was applying a lot of patching warmth to the RG-58U persuade nourish to the amphenol yield associated on the back of the undercarriage. Not awful for a homestead kid!

Slide 9

My apparatus in 1954 Heathkit DX-35 ARRL Field Day around 195? W3HUK W3OAQ Hallicrafters SX-28A Super Skyrider

Slide 10

International directions state: "All stations might just utilize the base power required for viable communications." My Dad\'s ranch was situated in Northeastern Pennsylvania toward the east of Elk Mountain in Union Dale, PA. Our rise was around 1,500 ft on the east incline. In this way I had a reasonable shot confronting New Jersey and New York City. My 80 meter and 40 meter dipoles and my 50 Watts would blow "cool kilowatters" transmitting from loft structures in New York City "right out of the sky".

Slide 11

How I (KC9JPZ) got once again into Ham Radio in 2006 I was at my typical Tuesday night sell off at the Shadow Auction Barn (1517 Maple Ave., Terre Haute) around two years back. I had quite recently arrived. There were two sell-offs going ahead in the "back room". A youthful companion (Andrew) hollered out to me when I arrived. "Hello Doc! They\'re unloading a radio right now!" I glanced around on my right side and saw the salesperson holding up a Drake R8 Communications Receiver. I held up my hand and got it for $3. The R8 Speaker went next. I needed to pay $5 for that! I took it home, snared a short wire to it, and connected it to. Low and observe the LCD screen lit up and clamor left the speaker. It worked! I got a manual off the Web. The following day I discovered there was not one thing amiss with this beneficiary. Drake R8\'s go on eBay for about $500 (on the off chance that you can discover one!). Following a year or so of listening to it and particularly the HAM groups, my code returned and I was snared once more. I was authorized as KC9JPZ in Summer of 2006. In fact,I took my General Class exam at W.V.A.R.A. 2006 Field Day

Slide 12

How I got into QRP and why I picked Ramsey Kits I did a considerable amount of Ham Radio between the season of 1954 (8 th grade) and High School. I set up numerous contacts. I think I recollect nearly getting my WAS and having a considerable amount of DXing for my DXCC. My pride and satisfaction was my QSL card from Eritrea (a little nation only north of Ethiopia). Sadly, after secondary school I entered Penn State University and truly did not lose enthusiasm for Ham Radio but rather lost all my time for it. Sometime down the road I was caught up with acquiring a living. In the end I lost my permit. After my resurgence once more into Ham Radio, I thought "why not do it once more" but rather this time make it additionally energizing and "QRP it." Although I bought an ICOM 718 amid the Fort Wayne Hamfest a year ago (which can be conformed to low power) as my primary apparatus, my QRP attempts would be left to pack constructing and dragging my Drake R8 every so often into the field outdoors with a decent profound cycle battery. In my "more youthful days" I worked a considerable measure of the 40 meter band. I then obtained the Ramsey QRP 40 meter transmitter on the grounds that "The unit looked appealing".

Slide 13

Reference http://www.qsl.net/ve6bpr/qrpfreq.htm

Slide 14

To See The Enormous Growing Popularity of QRP Go to http://www.qsl.net/miqrpclub/links.html the "chain locker" of the Michigan QRP Club (to see a rundown of clubs and unit providers for QRP) QRP isn\'t just about utilizing low power, it\'s about utilizing basic gear (and basic radio wires.

Slide 15

Reference same as past slide

Slide 16

CW versus SSB Graph again cordiality of New Jersey QRP Club http://www.njqrp.org/and http://www.njqrp.org/whyqrp/whyqrp.htm (why QRP?)

Slide 17

Here\'s a decent bend: a tube QRP Rig (shine bug) http://home.stny.rr.com/wa2ntk/qrp_1.htm W2NTK circuits

Slide 18

Ramsey 40 m QRPc Rig Picture from Ramsey Home Page Manual at: http://www.ramseyelectronics.com/downloads/manuals/QRP40.pdf Transistor circuit, oscillator, RF amp chain, and clean keying stage RF yield approx 1 Watt (.75W for QRP-20) Pi-arrange yield for good coordinating and symphonious concealment Provision for two interior precious stones, front board exchanging VCXO tuning, recurrence can be tuned approx 7kHz around xtal freq. (3.22 kHz with our apparatus)

Slide 19

My Ramsey QRP 40 Rig after manufacture

Slide 20

Copied from Ramsey QRP 40 manual (Copyright Ramsey, Inc.) Ramsey QRP40 transmitter Block Diagram

Slide 21

54.3 Ohm Attenuator Used to Measure RF

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