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WILLIS KINGSLEY WING .... Editor KEITH HENNEY . Director of the Laboratory HOWARD E. RHODES . . Technical Editor EDGAR H. FELIX . . . Contributing Editor
RADIO BROADCAST
PUBLISHED FOR THE RADIO INDUSTRY
VOL. XV. NO. 6
Contents for October, 1929
MERCHANDISING SECTION
The Telephone Rings the Doorbell Everett M. Walker 317
Features That Sell Radio ---- Dudley Walford 319
Are Used Sets Like Used Cars? - - - - 320
Clippings - - - What Radio Men Say 322
Saving the Summer Slump --------- 323
Have You Personality? Then Sell It Howard W. Dickinson 324
A Merchandising Plan That Sells Sets ------ 326
Keeping Service Sold ----- John S. Dunham 328
Tested Sales Ideas ---- Merchandising Shorts 330
Cooperative Dealer Broadcasting Novel Window Display
Sell Your Golf Clubs Receivers Building a Prospect List
Striking Window Display Dramatizing Battery Set's Uselessness
Value of Good Delivery Trucks Selling the Farmer
The Radio Dealer's Advertising Dollar ------ 332
The March of Radio An Editorial Interpretation 334
How About the Jobber's Place? A Medal for Commissioner Lafount Improving the Dealer's Position Courts Strengthen Commission's Position
Professionally Speaking ------ Keith Henney 336
We Still Have Growing Pains New Features for 1930 Sets
The Tube Business News of the Tube Industry 337
News of the Radio Industry --------- 338
In the Radio Marketplace Offerings of Manufacturers 342
The Serviceman's Corner - - - - - 344
ENGINEERING SECTION Strays from the Laboratory Technical Shorts 349
Regarding Band-Pass Circuits Engineering Limits
Efficiency of Crystal Control New Government Books
Data on Pentodes Cost of Quartz Crystals
Eight Good Slogans Badio Sets for the Farm
Grid-Leak Vs. Grid-Bias Detection J. M. Stinchfield 350 "Radio Broadcast's" Set Data Sheets ------ 353
The Edison Model C-l The Fada Models 55 and 77
The Steinite Model 40 The Buckingham Model 80
Automatic Volume Control Virgil M. Graham 355
Design of the Colonial 32A.C. Fulton Cutting 358
An English Output Tube, the Pentode -W.T. Cocking 360 Radio Broadcast Laboratory Information Sheets
Howard E. Rhodes 364
No. 301. Output Transformer No. 303. "Power" and "Lin
Ratios ear" Detection
No. 302. Output Transformer Ratios
The contents of this magazine is indexed in The Benders' Guide to Periodical Literature, which is on file at all public libraries
among other things
This month we take a few lines to quote the plaint of a dealer who has the problem of selling radio in a rural community. His shop is in North Dakota. He says: "Have the radio manufacturers forgotten there is a rural population? I do not know of a commercial receiver that is practical and at the same time economical in operation for the user of batteries that can even approach the satisfactory performance of the modern socket-powered sets.
As a dealer in a rural community I expect approximately fifty per cent, of my business from the rural population who have no electric light service, and I have to get along with magnetic loud speakers and the power output of a 112a tube, unless they can afford an extensive outlay of B batteries and continual charging of storage batteries to operate a larger power tube and dynamic loud speaker.
It is my impression that any manufacturer who would market a practical four or five-tube screen-grid set with a low plate-current consumption and the volume level of a 171a tube or more would be amply rewarded for his efforts. As it is, sales on battery sets will be bound to slump badly and a large potential market is being sadly neglected."
Let the rural dealers take heart. It will not be long that the battery-user will be penalized for his lack of electric power service. Some sets are already on the market to meet this requirement — and it is a real one — and more are on the way. We should not be surprised to see new tube design contribute greatly within the next twelvemonth to a more complete answer to this need.
The Rochester, Buffalo-Niagara, Cleveland, and Toronto sections of the Institute of Radio Engineers are sponsoring a district convention to be held in Rochester, N. Y., November 18 and 19. Papers will be delivered by A. Hoyt Taylor, W. A. MacDonald, W. C. White, and others.
— Willis Kingsley Wing.
TERMS: $4.00 a year; single copies 35 cents; All rights reserved. Copyright, 1929, in the United Stales, Newfoundland, Greal Britain, Canada, andother countries by
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MAGAZINES Country Life
Radio Broadcast
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Le Petit Journal
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314 •
• OCTOBER 1 929 •