Judge — October 28, 1922 — page 32: what you’re looking at

Machine-transcribed from the original scan — historical spelling and the odd misread are preserved.

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PRESS CLIPPINGS potte,tnem for soe baslaam, your nlvare, roar hobbies, ‘eratieation or for any other motive. * Multiply your owa facilities for getting ‘valuable informa. tlon out of wewspapers by taking advantage of our SERVICE. 1108 K. of P. Bide. Citoping, Service, Ind. Subscribers to Senor are invited to turn to us for advice regarding the selection, installation, operation and care of radio receiving sets. No charge ts made for this sereice. Address alt letters to Radio Editor, Juvar, 627 Weat 43d Street, New York, giving full name and exact street address, In ‘case an answer by mail is desired a tweo-cent postage stamp should be | tnelosed. For information concerning | the technical details of construction of receivers and transmitters the reader is referred to the acveral very excellent technical radio journals which are to be found everychere to-day, Radio Department Conducted by William H. Easton, Ph.D. Grand Opera ERE is an extremely interesting | H communication on dead spots from F. Kruse, New Orleans, La. “In the August 26 issue of Jupce I note a request for more information as to ‘dead spots.” “The phenomenon known as | spot is hardly as simple as the p | rel ‘fel rred to would lead one to bel | “The dead spot that is dead to all wave | lengths from any sending station is not | existent as far as I know. Dead spots | are all dead only to certain wave lengths or with reference to certain localitie: “In the range of extremely long the dead spot is not an annoying or fr quent affair. Stations like Annapolis and Nauen get into the deadest of the dead spots with little diminution. “At the longer ship wave lengths (1,000 to 3,000 meters) the dead spot begins to be evident in undeniable form and com- munication between certain points is most difficult. “On the commonest ship 600, the number of dead spots is legian, ‘Some of them are fixed dead spots that are completely dead to all 600 meter wave stuff of whatever origin. Notable ex- amples of this are found halfway from Port Arthur to H id about two- the dead ragraph | coastal station, thirds from Frisco to FE ii, ‘Then thei vable dead spots and fin there are spots that are dead with respect to some points only, For instance the NBZ, at Baltimore and the Washington Navy yard, NLL, drop out with amazing rapidity when one pro- ceeds down Chesapeake Bay while at the same time other Atlantic Coast stations and ships both in and out of the Bay are coming in normally. “There are further many pairs of in- land points that are dead with respect to each other on 600 meters but have per- fectly normal communication on other waves and in some cases have even ab- normally perfect transmission of some other wave. Such pairs are Washington- Baltimore, Washington-Philadelphia, Chi- cago-Kansas City. More About Dead Spots “On the broadcast and ape ial amateur we 360, 375 things appear but in still more aggravated form. pringfield, Mass. (WBZ) is. very nearly inaudible at Boston with the best of receivers; KDKA, at Pittsburgh (by far the best of all the broadcasting sta- tions), is weak and erratic all over the third radio district; KYW in Chicago is virtually never heard at Indianapolis; WAAC, New Orleans, reaches to the Great Lakes on the north but has a limited western range. “When the amateur wave length of 200 is considered, all of these things are re- peated in an extremely marked form but with new combinations of localities and with some additional variations. “Scranton, Pa., long had a reputation as a complete 200 meter dead spot but lately it has developed that it too can work to certain points. “The entire first and third radio dis- tricts swarm with points that cannot communicate at all well, Philadelphia Norfolk, Washington-Baltimore, Hart- ford-Boston, Springficld-Worcester, Rich- mond-) orfolk, but without exception these places and all others which can be similar! listed have good communication to other and far more distant. points. Thus it is not possible to work Hartford- Boston but it is perfectly and easily pos- sible to work Hartford-New York-Boston and while it is a matter of the utmost difficulty to work Chicago-Indianapolis it sible to work Chicago- apolis. a perfectly safe thing to say that there is no such thing as an unmodified dead spot. If any radiophone listener has that impression he is either confining his attempts te one particular station or else is listening entirely on wave length, let him try tuning for NOF on 1,100 meters or for WWX on 8,400 and the supposed ‘dead’ spot will suddenly de- velop life.” Baltimore-Ind “Tei