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These tubes were used as RF power amplifiers in some of the SCR-274 and AN/ARC-5 "command set" transmitters of WW2. Postwar, 1625 tubes flooded the surplus market, and were available for pennies apiece. Surplus 1625s found some commercial use, notably the use of a pair as modulator tubes in the Heathkit DX-100 amateur transmitter.
A pair of 833A's with adequate forced air cooling can deliver 1000 watts of CCS RF power operating as a class C amplifier plate modulated stage. A pair of tubes used in a class B modulator can deliver 1800 watts of "peak" AF power in ICAS service with speech, or 1600 watts in CCS service with music or high duty cycle operation. Two 833A's are ...
(acquired the broadcast rights in 2015) The National Dog Show (since 2002) Macy's Fourth of July Spectacular (earliest records are from 1996) Shrek the Halls (acquired the broadcast rights in 2023) Frosty the Snowman (acquired the broadcast rights in 2024) Rudolph the Red-Nosed Reindeer (acquired the broadcast rights in 2024)
The name was unfamiliar to many Filipinos. NBC TV 41 used to be MTV Philippines. MTV ("Music Television") is a cable TV network which was originally devoted to music videos, especially popular rock music. MTV later became an outlet for a variety of material aimed at adolescents and young adults.
The term All American Five (abbreviated AA5) is a colloquial name for mass-produced, superheterodyne radio receivers that used five vacuum tubes in their design. These radio sets were designed to receive amplitude modulation (AM) broadcasts in the medium wave band, and were manufactured in the United States from the mid-1930s until the early 1960s.
On April 28 and 29, the entire Today cast and crew broadcast the entire show from London, broadcasting all four hours live from London on the 28, and on the 29th, the Today show was expanded to seven hours, broadcasting beginning 4 am ET (9 am GMT) and the cast and crew broadcast all seven hours live from London. [29]
Now defunct since 2020 as DWRR-FM due to expired broadcast franchise with its frequency and broadcast stations were being acquired and used by Anchor Radio 101.9 in San Pedro, Laguna. RPN. DZKB-TV 9; DWWW 630 - Frequency returned to ABS-CBN Corporation in 1986 as DZMM. Now known as DWPM. [3] IBC. DZTV-TV 13; DWKW 1280/DZTV-AM 1386 - Defunct in ...
Since the amplifier is usually at the top of the combo, the tubes often hang upside down facing the body of the enclosure. They may be held in with clips. Most modern valve guitar amplifiers use a class AB1 push-pull circuit with a pair of power pentodes or beam tetrodes, 6L6 or EL34 but occasionally KT88 , 6550 , or the lower-power EL84 in ...