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HRO-7 T HRO-7-T

HRO-7 T HRO-7-T; National Company; (ID = 1429175) Amateur-R
 
HRO-7 T HRO-7-T; National Company; (ID = 1429176) Amateur-R
 
HRO-7 T HRO-7-T; National Company; (ID = 1429177) Amateur-R
 
HRO-7 T HRO-7-T; National Company; (ID = 1429178) Amateur-R
 
HRO-7 T HRO-7-T; National Company; (ID = 1429179) Amateur-R
 
HRO-7 T HRO-7-T; National Company; (ID = 1429181) Amateur-R
 
HRO-7 T HRO-7-T; National Company; (ID = 1429182) Amateur-R
 
HRO-7 T HRO-7-T; National Company; (ID = 1429183) Amateur-R
 
HRO-7 T HRO-7-T; National Company; (ID = 1429185) Amateur-R
 
HRO-7 T HRO-7-T; National Company; (ID = 1429186) Amateur-R
HRO-7 T HRO-7-T; National Company; (ID = 965939) Amateur-R HRO-7 T HRO-7-T; National Company; (ID = 965943) Amateur-R
HRO-7 T HRO-7-T; National Company; (ID = 965940) Amateur-R HRO-7 T HRO-7-T; National Company; (ID = 137931) Amateur-R
HRO-7 T HRO-7-T; National Company; (ID = 965941) Amateur-R HRO-7 T HRO-7-T; National Company; (ID = 965942) Amateur-R
HRO-7 T HRO-7-T; National Company; (ID = 965944) Amateur-R HRO-7 T HRO-7-T; National Company; (ID = 965945) Amateur-R
HRO-7 T HRO-7-T; National Company; (ID = 1429174) Amateur-R  
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HRO-7 T HRO-7-T; National Company; (ID = 965939) Amateur-R
National Company;: HRO-7 T HRO-7-T [Amateur-R] ID = 965939 933x597
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For model HRO-7 T HRO-7-T, National Company; Cambridge & Malden (MA)
 
Country:  United States of America (USA)
Manufacturer / Brand:  National Company; Cambridge & Malden (MA)
alternative name
 
National Toy Co.
Brand
Thrillbox
Year: 1947–1949 Category: Amateur-Receiver (amateur bands, may include broadcast bands)
Valves / Tubes 11: 6K7 6K7 6J7 6C4 6K7 6K7 6H6 6H6 6SJ7 6V6GT 6J7 0A2
Main principle Superhet with RF-stage; ZF/IF 456 kHz; 2 AF stage(s)
Wave bands Broadcast, Long Wave and more than two Short Wave bands.
Details
Power type and voltage Alternating Current supply (AC) / 115 / 230 Volt
Loudspeaker - For headphones or amp.
Power out 1.5 W (unknown quality)
from Radiomuseum.org Model: HRO-7 T HRO-7-T - National Company; Cambridge &
Material Metal case
Shape Boatanchor (heavy military or commercial set).
Notes coverage 0,05 - 30 MHz (9 ganged coil sets 50-100 / 100-200 / 180-430 / 480-960 / 900-2050 kHz / 1,7-4 / 3,5-7,3 / 7-14,4 / 14-30 MHz, bandspread in HAM bands), AM/CW/SSB (BFO);
new streamlined cabinet, integrated noise limiter, grey micrometer dial and coil sets with linear marks;
external power supply 697 (voltages: filaments 6,3V B+ 240V), optional external speaker MCR or HRO-7TS.
Price in first year of sale 311.00 $
Collectors' prices  
Source of data Communications Receivers
Mentioned in Shortwave Receivers - Past & Present (3rd ed.) (3rd ed., p. 292)
Literature/Schematics (1) Photofact Folder, Howard W. SAMS (4820-12 Set 50 Folder 12)

Model page created by a member from A. See "Data change" for further contributors.



All listed radios etc. from National Company; Cambridge & Malden (MA)
Here you find 430 models, 275 with images and 162 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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