JAMES 0 WALDO, JR
Electrician at Spanish Pt Dr, El Paso, TX
License number
Texas 381102
Expiration Date
Sep 28, 2017
Category
Apprentice Electrician
Address
Address
14653 Spanish Point Dr, El Paso, TX 79938
Phone
(808) 729-1635
Professional information
Apparatus And Method For Tamper Resistant Channel Attenuation In Subscription Television Converter
US Patent:
4286288, Aug 25, 1981
Filed:
May 25, 1979
Appl. No.:
6/042355
Inventors:
James K. Waldo - El Paso TX
Assignee:
Teleprompter Corporation - New York NY
International Classification:
H04N 716
US Classification:
358114
Abstract:
A tamper resistant subscription television converter is made by connecting a bandstop filter in the Radio Frequency circuit of the converter. The filter, for attenuating one or more preselected subscription television channels is connected in series at a location in the Radio Frequency circuit such that tampering with it would affect the converter's alignment. The filter is tuned to obtain maximum attenuation of the preselected channels and the converter is aligned for proper reception of the remaining channels. Any attempt to disable the attenuator results in unacceptable reception of all channels. A preferred bandstop filter is a constant K, T section L-C filter.