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--r..ta U 8H NEW G&G CATALOG! MILITARY ELECTRONICS 24 PAGES crammed wit h Gov't Surplus Electronic Gear-cthe Biggest Bargain Buys in America! It will pay you to SEND 25__ for your copy -- Refunded with your First Order! BC-645 TRANSCEIVER. 15 tubes, 4 3~ to 500 Mc. Easily adapted for 2 wi.JV voice or code on Ham. Mobile, Tele· vision El(penmental and Citizens' Bands, With tubes. less power supply in factory carton. Brand new , $16.95 SPECIAL PACKAGE OFFER : " ', ....... , ,7,7I"I,v..,,,. - , ~ /' ~'~"'2"·,,-: .."·'..'6.. _ '""""" ,.... VARIABl.E C PACITORS TUBES • pc 'S 25 K ~ ' Su.... 2AP ' _ S I3.9 5 2!>OTH-25OO Me 200 50 cap 20uul SUP ' _ l ol 95 30
In your interesting article on Tesla you mentioned some references. Where? What did you do with them? Owen Thompson, WA4NXA I never thought you'd ask...here they are...ed. Prodigal Genius: The Life of Nikola Tesla, John J . O'Neill, Ives Washburn, Inc. 1944. Experiments with Alternate Currents of High Potential and High Freq uency, Nikola Tesla, McGraw-Hill 1904. Nikola Tesla: Lectures, Patents, Articles, NikoJa Tesla Museum, Beograd, Yugoslavia 1956. "Tesla's Oscillator and Other Inventions," Thomas Commerford Martin, Century, April, 1895. "The Tesla Steam Turbine:" Scientific American, Sept. 30, 19 11. "Nikola Tesla," Kenneth M. Swezey. Science, 16 May, 1958. UMy Inventions," Nikola Tesla, Electrical Experimenter, a series begun February, 1919. " Some Personal Recollecti ons," Nikola Tesla, Scientific American, June 5, 1915. "The Problem ofIncreasing Human Energy," Nikola Tesla, Century, Ma y, 1900. "Nikola Testa- Last of the Pioneers?" Leland L. Anderson, Journal of Engineering Education, June, 1959. It has been a number of years since I have written to you, nevertheless, I buy 73 and read de W2NSD/l your editorials beat any o ther Ham Radio magazine on the market from QST to them all. I particularly have enjoyed your excursion around differents part of the globe. especially Europe. I would like to call your attention to January's issue on page 100, European VHF , by Lee Grimes, who is stationed there in Berlin. This article was one of the best I ever read; it was most informative. I am sure that there are thousands of us who enjoyed this article. The Editorial Liberties in the February issue brought some snickers about the ARRL requesting charac ter references from some other Hams in order to renew your license or obtain a Ham license. Your article on Nikola Testa and his contribution to electronics was well appreciated; however, I kn ow I will never have the brains to pass th e Extra Class exam. I am satisfied with th e small amount of the frequency band that I'm allowed to operate on. I agree that the incentive deal didn't change the picture one iota as far as I can see. Kenneth Mahoney. K60PG Reference is made to your letter o f 7 February 1969 concerning amateur radio operations from Navassa Island. Navassa Island is a small, rocky island with sheer sides extremely inhospitable in nature. It is uninhabited, lacks any source of potable water, and the terrain is rough and broken. The only installation on the island is an automated lighthou se maintained by the Coast Guard. A landing can o nly be accomplished from a small boat and requires scaling a 40 foot Jacobs ladder, which is an especially hazardous undertaking. While we recognize that a well outfitted and organized group could reduce the hazards of visiti ng Navassa to some extent, we would not be able to supe rvise the operations proposed to the degree that would be necessary to assure the reasonable safety of the individuals concerned. Since the island is under the jurisdiction of the Coast Guard, BACK ISSUE GUNSMOKE ! 30, count 'em 30 , stupendous tremendous (more handbooks than magazines) fascinating enormous devastating incredibly enervating back issues of 73 . ONLY $5.00 p ostp ai d w orldwide Yes...yes..• yes...here is a go lden o p p o rt u nit y t o blow y our mind on 30 bac k issues of 73. You send us $5 in negotiable sec u rities, cash or c h eck and we will send you an unbelievable miscellany o f thirty d ifferent lall dlf f erentl b ack Issues, all f rom t h e 1960-1966 era. T hese are all rare c ollect o rs it em s. Every o n e c ould likely be worth a fort u n e to you. Who knows, you might even f ind a rare January 1961 in this pileI We don't even know what IS i n these packages. To keep co st s down we have had these magazines packed into slo p py b u ndles by the Chimps f ro m B enson' s W ild A nim al F arm ( nearby). W atch out for banana skins. - If you w ant specific issu es of 7 3 t hey ar e available at the low lo w ( h igh) price of $ 1 each. Unless we don't have t h em, in w hich case the price is h ipher. - H ow about send ing a bundle to a O X friend ? Back issues of 73 are worth their weight in unicorn dung In most c o u n tri es. - M o n ey received w it h o u t a shipping address will be used for beer. 73 Magazine Peterborough NH 03458 HAMS! DON'T BUY USED TUBES COMPARE OUR PRICES FOR NEW TUBES RCA-{lE-EIMAC-AMPEREX-ETC. 811A-4.75, 4-125A-28.00, 4-65A-12.00 5R4G Y- 1.7 5, 807-1.75, WE350(807)-1.25 4-400A - 37.50, 813 - 20.95, 4X-1 50A-19.95 4-250A - 36.50, 4-1000A-80.00, 4PR60B- 555 4CX250B- 21.00 , 8236-1 2.95 , 2E26-2.50 1625(807-1 2v fil1-1.10, 4 17A-2.25, 404A-2.2 5 6 146-2.50, 6360-3.00, 2X2-.50, ODHJC3-.75 5879-1.75, 5881-3.25, WE-eV677 1000 WATT TETRODE-5.95, EIMAC-MACHLETT VT-158 1200-3000 WATT BOTTL E- READ MARCH 1969 ISSUE 73 HOW GREAT THIS IS-9.95! 12V 20A MP DIODE POWE R SUPPLY (LESS XFO RMER)-4.95. SEND FOR OU R LI ST Of OVE R 3000 TY PES OF AMERICA N, BRITISH AND EUROPEAN IMPORTED TU BES. LAR GEST STOCK OF X~t1TTING TUBES IN THE WOR LD. SEND rOR OUR lAR GE PARTS CATALOG (OUR PRICES ARE THE LOWEST IN TH E US A). UNITED RADIO COMPANY 56-A FERRY STREET NEWARK, NEW JERSEY 07105 MAY 1969 137
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WORLD'S LARGEST INDEPENDENT HAM MAG
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MAGAZINE 73 Magazine 11'104 , May 1
Page 5 and 6:
.. .. .... .", , , .. ...... ."'"".
Page 7 and 8:
Here are several hams who have achi
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New 500-Watt 5-Bander from NRCI You
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, I ....- , 0 0 ====j .- .'Q ' 0, .
Page 13 and 14:
ohm coaxial cable off ce nte r will
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Now your transmitter can work . •
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e AC and DC SUPPLI ES BU ILT IN! e5
Page 19 and 20:
If you're thinking about boning up
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y t hose whom I thought were of hig
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(Sometimes, when I make like an SWL
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-e,-,"' '.-- j - - , . .... .' 1 ,.
Page 27 and 28:
preselectors, it is a fine investme
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WHAT IS THE BEST ". CO'. TO SET ,,'
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I ,~ - Gel more receiver than you p
Page 33 and 34:
the boom, shorting all loops so tha
Page 35 and 36:
The lassie 36 With Patent Approved'
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look (electrical) at il. I took my
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ROHN, as the largest tower manufaot
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• ,~, • • • ••• 1>00"
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transmission line or the rf voltage
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sumed. A signal generator of suffic
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may not have enough rf available to
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cuitry developed through the earlie
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The Super SS Clifford Klinert 520 D
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present one, a boornless quad, was
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HOWARD W. SAMS Famous Editors & Eng
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declared that they " are and have s
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and the state regulating agencies.
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'0' '" '0. Fig. 2. T he direct r ea
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2 A 7/ I 1/2 ). ----~I/~--- 2 1/ 8
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0000 O' A"'( TE ll " • "'''''' 10
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Add This Simple Decimal Readout to
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THE STELLAR - CASE STATION IS NOW A
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\ 1/ r------- - TO l(lollTlil " P I
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Step 4: In actual practice, VBE wil
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F ig. 1A (II SPLIC E C E ~ T E R CO
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How to Fly YOur Kite M. B. Crowley,
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Boulder Antenna 18 28 38 48 58 Tabl
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MH z. and consequently less paths a
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30 a ~ ~ , I , I ~ V ' - 0 z I .' <
Page 86 and 87: 0 2 1!i0 'O!iV 8+ F ig. 2 . GAG7 Am
Page 88 and 89: I Telephone Beeper The following is
Page 90 and 91: the 20's and 30's the phone transmi
Page 92 and 93: • A Kilowatt Dummy Antenna •
Page 94 and 95: Mini-Bomb • Bill Brown 11".pSYK 2
Page 96 and 97: • DX'ing rom Joseph D. Burn ett ,
Page 98 and 99: Kalashi Nose, KH6IJ/l J0 Cam bridge
Page 100 and 101: Getting Your Extra Class License Pa
Page 102 and 103: - stage o f the game, it's a major
Page 104 and 105: e-radiation produced by the molecul
Page 106 and 107: and direction usually undergo chang
Page 108 and 109: Just to complicate things, most aur
Page 110 and 111: ----- ---- o F[EO------- - - ---- -
Page 112 and 113: corner reflector is sometimes incor
Page 114 and 115: known that almost any spaci ng (wit
Page 116 and 117: NEW BOOKS Electronics for Technicia
Page 118 and 119: Economy Ed Baker, W0EDO 993 7 Truma
Page 120 and 121: 4 x 150 Sockets Larry Jack, WA3AQS
Page 122 and 123: Alan Shawsmith. V K 4SS 35 Whynol S
Page 124 and 125: Handbook is easy to use and accurat
Page 126 and 127: TEST E UIPMENT 'IIi\IATUHE TEST L\U
Page 128 and 129: SQUEEZE ACTION TOOL A MUST FOR THE
Page 130 and 131: Adapting A Mobile Antenna System or
Page 132 and 133: LETTERS This is in response to your
Page 134 and 135: Also, I thought that the ta x-exemp
Page 138 and 139: we would retain responsibility for
Page 140 and 141: LARGEST SELECTION In United State.
Page 142 and 143: HAMFEST sponsored by Lancaster & Fa
Page 144 and 145: JOHN MESHNA JR. 19 ALLERTON. ST., L
Page 146 and 147: LIBERTY PAYS MORE! LIBERTY OFFERS M
Page 148: NEW DRAKE MODEL • TR·B 6-M SIDEB
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