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Full text of "Erv Rasmussen Interviews with Douglas Perham (Abstract)"

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2 . 


June, 1963, at the New Alraaden Museum, New Almaden 




Tape 1, Side 2 



Item 73. Leyden .jars. 19 units. From old spark ship 
set, 1910, 

Item 76. Stanley meters . Original meters from Herroid' s 
Garden City Bank Bldg, station. 

Item 77. Couplin g unit . Conical helix. Pet theory of 
Dr. Herroid. "Smitty," a technician at University of Santa 
Clara, who died in 1962, built these helixes for Herroid. 

45 item 81. Herroid oscillatox* . A copy of Poulsen's arc. 

Perhara explains operation of an arc. Pilled atmosphere with 
"mush. " The 30 kw Poulsen arc in museum collection could 
interfere with t elevision within a radius of 1,000 miles, if 
used today. This Herroid oscillator borrowed by Marconi Co. 
then demonstrated it as its own in New York, and England. 

consulting engineer with National Wireless, 

148 Correspondence from archives . Between W.W. Hanscomb/and Golden, (?) 

attorney for National Radio Co, formerly National Wireless 
Telephone and Telegraph Co. To Wolverton from Hanscornb. To 
stockholders. Period from 1914 to 1920. 

447 Item 85. Multi carbon micro phone/ ^&ildd to modulate arcs. 

Patented by Herroid. 

Item 87. Lightning arrester . Made by Herroid. 

Item 85. Marble base key . Used by Herroid. 

Item 89. Two choppers. Used by Herroid. Operation described 
by Perhara. 

item 92. 500 volt chopper . 

515 Item 90. Loose coupler . Used from 1910—1925. Herroid furnished 

people in valley with crystal receiving sets so he would have 
audience . 

Item 91. Tuning coil . Two sliders. 

Item 93. Murdock telephones . On market about 1910. 

Item 94, 95. Westen voltmeter, ammeter . 

Item 96, 97. Tuning condensers, variable inductance rea ctors 
used at herrold's station. — — 









Abstract, Tape 1, Side 2 — 2 

Item 98, Set of pictures and documents . An official inventory 
Herrold's material prepared for new company. Blue print of 
original oscillator. Photo of Emil Portal who started own 
broadcasting station in Los Altos, which was later under Colin 
B. Kennedy Co. Kennedy Co. making marine receivers at old 
Auzerais (?) house in 1919. Dr. Leonard Fuller, partner and 
financial backer. Saunders was Herrold’s operator, living now 
in Manteca. Letter from Herrold and Portal to Manseomb, March 
3, 1916. News story in Pacific Radio News, January 19, 1921 
on recently incorporated Colin B. Kennedy company. Kennedy, 
President; Harry J. Rathbun, Vice President; Nathan J, Bowers, 
Secretary; Emil Portal, Treasurer; and Dr. Leonard Fuller, 

Board member. Comments on these men. 


Doug Perhara reads highlights of de Forest’s life from 1873 to 

1957* Also reads an introduction he wrote for occasion honoring 

de Forest. Discussion of de Forest. 

Item 100, 38 tubular audions . This collection covers de Forest’s 

early work. Candle labra base s . Reference to letter in archives 
from de Forest stating that ’’this is his original tube. V. a 
cylindrical tube, candlelabra base. Discussion of various de 
Forest tubes. 


Perforated metal/tubes made by Moorehead. Type R tubes. Moore- 
head and de Forest collaborated in manufacturing tubes. Friendly 
patent suits. 

1916. De Forest shotgun suit against Moorehead, Elmer Cunningham 
and Hyde. Injunction denied. 

Cunningham records in Perhara’ s archives. 

Item 102. Singertype audions. Medium powered transmitting tubes. 
Could be used in an oscillating device at audio frequencies. 

Item 1C 3. H. tube . 100 w transmitting tube used in mid ’20s or 
early ’30s. $18.00 from the De Forest Radio Company, New Jersey. 

Item 104. Fleming valve . Rarest of tubes in collection. Discussion 
of Edison’s work, Lippincott (patent attorney), Ben Cromey (?) 

Legal battles between Fleming and Marconi v.s. de Forest. 

Item 105. 48 miscellaneous Marconi, de Forest and Moorehead tubes . 

Three-way deal. Story of Otis Moorehead, born 1893 in San Fran- 
cisco. Died 1923. Patent suits. Letters from archives. 

Moorehead became largest manufacturer of vacuum tubes in U.S. — - 
factory in S.F. 1919 — de Forest, Marconi, Cunningham and Moore- 
head combined to make tubes. Sales, royalties, etc. RCA formed 
in raid 1920. . Brochure of Moorehead Company of 1919; Bankrupt 
in 1920. 

Abstract, Tape 1, Side 2 — 3 





Comment on Harry Roome of Los Angeles . Sold vacuum tubes under 
name of oseillitron for about 2 years. 

Item 107. Two de Forest detector units . Built by de Forest by 
hand at 913 Emerson Street. Used for experiments. 

Item 108. De Forest navy detector . Sliding tuner designed by 
de Forest before he invented vacuum tube. Compared to "Responder" 
which is about \ size of detector. Responder very rare — Smithsonian 
recently bought one for $250. from Paul Giganti/ The detector 
was prototype of the RJ4 and RJ5 which came along commercially . 

Item 109. YT 20s . Made by de Forest first without a getter, six 
months later with one... 1920. 

Item 110. Edison lamp made by McCandless . Bamboo filament: showing 
the "Edison effect." 

Item 111, 500 watt transmitter tube. Built by de Forest about 

1918-1919. ' 

Item 112. Transmitting tube . I kilowatt oscillion. Listed in 
old de Forest catalog of Lee de Forest, Incorporated, 451 Third 
Street, S.F. Prior to May, 1920, Describes the Singer tube 
with tungsten wires. (Catalog autographed by de Forest on December 
15, 1956 when he visited Perhara) Oscillion tubes described. 

Lee de Forest, Inc. was marketing organization on the West Coast 
for the De Forest Radio Co. of New Jersey. 

Item 114. De Forest tube cans . De Forest sold receiving tubes in 
cans ±n mid- 1 20s „ DL and DV series shipped in cans with screw 
tops. Early ones without labels. 

Item 115. Be Forest fan switch . Ingenious. Comments on lack of 
business sense. 

Items 118, 119. 120. De Forest receivers, D7, D12, D17. D7 has a 
reflex crystal detector. .description. 

Item, 121. DT600 crystal set . "Everyman's radio." 

Item. 122. Two dynatherm units . De Forest diathermy machines. 

Built in 1930s. 

Item 123. De Forest variable condenser. 

Item 124. De Forest receiver — D6 . Not complete. 

Item 117 . 16 framed documents and photos. Feud on between Mrs. 

Cogswell, secretary of Palo Alto Historical Society and Dr. de 
Forest and Doug Perham re the sign in front of 913 Emerson Street. 


/ ' / 

’ -index 





Abstract, Tape 1, Side 2 — 4 

Sign states 913 is "the birthplace of electronics." First radio 
communication in Palo Alto took place at Elwell 's home on Cowper 
Street and Middlefield Hoad— —1551 Gcwper. Elwell had a receiving 
station in Los Altos. 

Discussion of de Forest and Fleming conflict? feud between de 
Forest and Armstrong; Ralph Heintz and patent suits; RCA tube 
stranglehold. Comments on Cyril Elwell, Terman, Chaskin. 

Item 125. WE 212b. Large transmitting tube from KCBS. 

End of Tape 1, Side 2.