Grid position and amplification in three electrode tubes
A historical note explains grid relative position to filament and plate, mesh size effects, and the relation between grid voltage and plate current. It discusses the amplification factor IX, with examples where 40 volts on the plate corresponds to five volts on the grid, and how mesh fineness or coarseness alters the required grid potential. It also covers symmetric grid-drive behavior, the use of a grid bias battery designated O, and how these factors affect detector and amplifier operation in amateur radio tubes.
Big Ships Radio Equipment On Paris And Lafayette
The ships Paris and Lafayette feature a five kilowatt transmitter with a 2000 to 9000 meters wave range and a motor generator for plate high tension and filament heating. Each carries a radio range finder or goniometer, a radio compass. Messages from the Paris have covered 3400 kilometers safely.
MENTIONED IN THIS ARTICLE
Paris
Lafayette
Radio for Animal Training at the Trippodrome
George Power, elephant trainer, will conduct radiophone experiments at the Trippodrome in New York to test if his big pets can follow orders on stage in his absence. The project aims to determine future feasibility of remote instruction for animal performers.
MENTIONED IN THIS ARTICLE
Trippodrome
New York
Ery
George Power
Professor Bell Keeps Teasing Radio With Telephone
Alexander Graham Bell at seventy five remains engrossed in listening to and experimenting with the telephonic device he helped create. Friends say he is ardent about the radiophone and not tired of trial and error, despite moving the telephone from his home after it annoyed him.
MENTIONED IN THIS ARTICLE
Professor Bell
Alexander Graham Bell
Mr. Bell
Radio circuit tuning cautions for oscillation stability
The guide warns that equal strength oscillation over a wide range needs near constant L to C ratio when tuning, and that matching natural periods of trekler and grid circuits is essential. It cautions against placing the variometer tight to the grid coil, using high impedance tubes in low impedance circuits, and suggests trying multiple detectors with a soft gas tube for detection and a hard tube for oscillation. It also warns against shellac for inductors due to moisture absorption.
Notice of auditor and administrator in Indiana estate cases
The auditor LEB. MILLER announces he will attend duties at Savings & Trust Co building Indiana on Monday July 17 1922 for the estate of eagl E Mitchell. Also letters of administration granted for James G Cribbs estate South Mahoning township, claimants to present and debtors to pay promptly.
MENTIONED IN THIS ARTICLE
Uditor
Qrabians' Court of
Indiana
Couny
A. W. Mason
Eagl E. Mitchell
Tate
Tudlana Thorougly
Savings & Trust Co
Borough of
Pan
Wakerlock
Breper
Leb. Miller
James G. Cribbs
South Mahoning Township
Pennsylvania
W. D. Mecleary
GG. Gahagan
W. 8. Smith
T. J. Jackson
J. J. King
North F Coal Mining Company
Henry I, Wilson
Indiana, Indiana Co
J. Telford
Willam M. Rogers
East Wheatfield Township
Jennie Hill Rogers
Dxecntrix
Seward
Thomas Kerr
Grant Township
Alph Kerr
Harry Kerr
Marion Center
Joseph C. Macro
Orphans’ Court
Indiana County
Mouey
Guiseppe Gallo
Antonio
Tony) Provenzano
Young Township
Hits
Savings & Trust Building
Wilmer H H. Wood
W. C. Chapman
Andrew P. Clark
Lnte
West Wheatfield Township
Tolan
W. ¢. Chapman
James Chapin
North Mihoning Township
David F, Chapman
Smicksburg
R. J
Wallace
Chapman
Tnodlana
S.J. Telford
Sue E. Cooper
Harry Cooper
Livermore
Also Mentioned on This Page
The
Marshall Bldg
Indiana, Pa
Westinghouse
Clymer
Carrol D. Oakes
JM Stewart
BIO Warehouse
Woodburn Granite Works
Barre
Pennsylvania Railroad
Main and
Church Sts
Vogel Electric CO
Bear Graff's Meat Market
Westinghouse Teries
Faattiva
Radio Don ES
Wireless
de Forest
Clapp-Eastman
Western Electric
Radiotron
Cunningham
Federal
Willard
Lightcap Electric Co
Vesta Battery Service
Bell
D. J. Means
Nixon Alley
Sutton-Miller Co
Telford
Winietrapor
Claud M. Cribes
Mary E. Cribbs
Saicksburg
Ths
Park Lytle
Radio Club of Indiana
Radiola
West Penn Radio CO
Pittsburgh
Jes M. Lutman
N. 12Th St
Wilson Banka
TH Mellwood
Cherryhill Township
Samue Cen Treculon
Thomas Pealer
Indina, Pa
This is just the beginning! Our collection holds over 300 years of history, including rare newspapers, obituaries, marriage records, birth records, and so much more—most of which you won’t find anywhere else!