Variocoupler |
1910 ?? |
mod-pre26 |
|
3 |
 |
|
|
|
Variable Air Condenser 246L |
1912 ?? |
Radio part |
|
2 |
 |
|
|
$ |
Air Condenser 120 A |
1916 ? |
Radio part |
|
2 |
 |
|
|
|
BC14A |
1918 |
Crystal |
|
15 |
 |
|
|
$ |
1-Step Amplifier Type 206 |
1919 |
Ampl/Mixer |
1 |
1 |
 |
|
|
|
Audibility Meter Type 122 |
1919 ? |
Equipment |
|
1 |
 |
|
|
|
Constant Impedance Audibility Meter Type 164 |
1919 ? |
Equipment |
|
1 |
 |
|
|
|
Direct-Reading Wave-Meter Type 145 |
1919 ? |
Equipment |
|
1 |
 |
|
|
|
Direct Reading Wave-Meter Type 174 |
1919 ? |
Equipment |
|
5 |
 |
5S |
1F |
|
Vacuum Tube Detector Type 211 |
1919 ? |
mod-pre26 |
1 |
1 |
 |
|
|
|
Variable Air Condenser Type 101 |
1919 ? |
Radio part |
|
1 |
 |
|
|
|
Variable Air Condenser Type 182 |
1919 ? |
Radio part |
|
3 |
 |
|
|
$ |
Vernier Condenser Type 169 |
1919 ? |
Radio part |
|
1 |
 |
|
|
|
Phantom Antenna A 50 |
1919 ?? |
Equipment |
|
|
|
|
|
|
Two Step Amplifier 215 |
1920 |
Ampl/Mixer |
2 |
7 |
 |
1S |
|
$ |
Audio Oscillator 1000 Hz 213-B |
1920 ? |
Equipment |
|
4 |
 |
5S |
|
$ |
AF Transformer 231-A |
1921 |
Radio part |
|
10 |
 |
5S |
|
$ |
Variable Air Condenser |
1922 |
Radio part |
|
1 |
 |
|
|
$ |
Amplifier Unit Type 300 C |
1923 |
Ampl/Mixer |
1 - WD11 |
1 |
 |
1S |
|
|
Amplifier Unit Type 300 D |
1923 |
Ampl/Mixer |
1 - UV201A |
9 |
 |
1S |
|
$ |
Power Amplifier Type 272 |
1923 |
Ampl/Mixer |
2 |
1 |
 |
|
|
|
Wavemeter and Filter 247 (247-W) |
1923 ?? |
mod-pre26 |
|
18 |
 |
4S |
|
$ |
Medium Frequency Transformer 271 |
1924 |
Radio part |
|
1 |
 |
|
|
|
Rheostat 301 |
1924 |
Radio part |
|
1 |
 |
|
|
|
Variable Condenser 247-H , 247-F |
1924 |
Radio part |
|
3 |
 |
|
|
$ |
Vario Coupler Type 268 |
1924 |
Radio part |
|
6 |
 |
2S |
|
$ |
Decade Resistance Box 102G |
1924 ?? |
Equipment |
|
5 |
 |
|
|
|
AF Transformer 285 |
1925 |
Radio part |
|
1 |
 |
|
|
|
Filter 247 (247-W) |
1925 |
mod-pre26 |
|
1 |
 |
4S |
|
|
Straightline Frequency Condenser 374 |
1925 |
Radio part |
|
1 |
 |
|
|
|
Straightline Wavelength Condenser 334 |
1925 |
Radio part |
|
1 |
 |
|
|
|
Variable Air Condenser 239-E |
1925 ?? |
Radio part |
|
3 |
 |
|
|
|
Direct-Reading Wavemeter 574 |
1925–42 ? |
Equipment |
|
5 |
 |
2S |
|
|
B-Eliminator Kit |
1926 |
Kit |
1 - BH |
1 |
 |
|
|
|
Coupling Impedance 369 |
1926 |
Radio part |
|
1 |
 |
|
|
|
Filter Choke 366 |
1926 |
Radio part |
|
2 |
 |
|
|
|
Hudson Big 6 |
1926 |
Radio |
6 |
|
|
|
|
|
Rectifier Transformer 365 |
1926 |
Radio part |
|
2 |
 |
|
|
|
Universal |
1926 |
Kit |
4 |
1 |
 |
|
|
|
3 dials |
1926 |
Radio |
6 |
|
|
|
|
|
Tube Tester 361-B |
1926 ? |
Equipment |
|
|
|
1S |
|
|
B Eliminator |
1926 ?? |
Power-S |
1 - BH |
|
|
1S |
|
|
Amplifier Transformer 585 585-D, 585-II, 585H |
1928 |
Radio part |
|
1 |
 |
|
|
|
Wavemeter 358 |
1928 ?? |
mod-past25 |
|
14 |
 |
|
|
$ |
Power Amplifier and Plate Supply Type 400 |
1929 |
Power-S |
2 - UX213 |
1 |
 |
4S |
|
|
Power Amplifier and Plate Supply Type 420 |
1929 |
Ampl/Mixer |
2 - UX213 |
|
|
|
|
|
Output Meter 483 |
1930 |
Equipment |
|
2 |
 |
|
|
|
Test Oscillator 360 |
1930 |
Equipment |
1 - UX112A |
2 |
 |
2S |
|
$ |
Audio Oscillator 400 Hz 213-C |
1930 ? |
Military |
|
5 |
 |
1S |
|
|
Amplifier 210 |
1930 ?? |
Ampl/Mixer |
5 - 26 |
|
|
1S |
|
|
Amplifier 250 |
1930 ?? |
Ampl/Mixer |
3 - 27 |
|
|
1S |
|
|
Modulating Oscillator 403-C |
1930 ?? |
Equipment |
2 - unknown_Tube |
1 |
 |
1S |
|
|
Oscillator 320 |
1930 ?? |
Equipment |
1 - 12A |
1 |
 |
1S |
|
|
Oscillator 360-A |
1930 ?? |
Equipment |
1 - 112A |
|
|
1S |
|
|
Rectron "B" Eliminator 390 |
1930 ?? |
Power-S |
2 - UX213 |
|
|
1S |
|
|
Test-Signal Generator 404 |
1930 ?? |
Equipment |
|
2 |
 |
|
|
|
Variable Air Condenser 539-B |
1930 ?? |
Radio part |
|
7 |
 |
|
|
$ |
Variometer 269 |
1930 ?? |
Radio part |
|
2 |
 |
1S |
|
$ |
Amplifier 514-A |
1931 |
Equipment |
3 - 230 |
2 |
 |
3S |
|
|
Decade Resistance Box 602-J |
1931 |
Equipment |
|
4 |
 |
|
|
|
Dummy Antenna 418-B |
1931 |
Misc |
|
1 |
 |
1S |
|
|
Frequency Meter 434-B |
1931 |
Equipment |
|
1 |
 |
2S |
|
|
Oscillator 508-A |
1931 |
Equipment |
2 - UX245 |
6 |
 |
3S |
|
|
Rectifier - Type Wavemeter 419-A |
1931 |
Equipment |
1 - 230 |
1 |
 |
9S |
|
|
Resistor 500 |
1931 |
Radio part |
|
2 |
 |
2S |
|
|
Universal Bridge 293-A |
1931 |
Equipment |
|
1 |
 |
3S |
|
|
Variable Air Condenser 568 |
1931 |
Radio part |
|
1 |
 |
1S |
|
|
Volume control 652 |
1931 |
Radio part |
|
1 |
 |
2S |
|
|
Distortion Factor Meter 536 A |
1931 ? |
Equipment |
|
1 |
 |
|
|
|
Standard Signal Generator 603-A |
1932 |
Equipment |
2 - 30 |
11 |
 |
5S |
|
|
Test Signal Generator 604-B |
1932 ? |
Equipment |
2 - 31 |
2 |
 |
2S |
|
|
Vacuum Tube Bridge 561-A |
1932 ?? |
Equipment |
|
8 |
 |
|
|
|
Variac 200-CU (Baker) |
1933 |
Equipment |
|
5 |
 |
|
|
|
Wave Analyzer 636A |
1933 |
Equipment |
6 - 41 |
2 |
 |
11S |
|
|
Modulated Oscillator 484 & 484A |
1933 ? |
Equipment |
2 - 230 |
15 |
 |
1S |
|
|
Microphone Hummer (oscillator) 572-B |
1933 ?? |
Equipment |
|
3 |
 |
|
|
|
Audio Oscillator 813-A |
1935 ? |
Equipment |
|
4 |
 |
1S |
|
|
Amateur Band Frequency Meter 558-P |
1935 ?? |
Equipment |
|
4 |
 |
|
|
|
Decade Resistance Box 602-D |
1935 ?? |
Equipment |
|
1 |
 |
|
|
|
Decade Resistance Box 602-E |
1935 ?? |
Equipment |
|
|
|
|
|
|
Decade Resistance Box 602-F |
1935 ?? |
Equipment |
|
1 |
 |
|
|
|
Decade Resistance Box 602-G |
1935 ?? |
Equipment |
|
1 |
 |
|
|
|
Decade Resistance Box 602-K |
1935 ?? |
Equipment |
|
1 |
 |
|
|
|
Decade Resistance Box 602-L |
1935 ?? |
Equipment |
|
1 |
 |
|
|
|
Decade Resistance Box 602-M |
1935 ?? |
Equipment |
|
1 |
 |
|
|
|
Decade Resistance Box 602-N |
1935 ?? |
Equipment |
|
9 |
 |
|
|
$ |
Oxide Rectifier 492A |
1935 ?? |
Power-S |
|
4 |
 |
|
|
|
Precision Condenser 2225 |
1935 ?? |
Equipment |
|
|
|
|
|
|
Wavemeter 566-A |
1935 ?? |
Equipment |
|
3 |
 |
|
|
$ |
Strobotac 631-A |
1935–39 ? |
Equipment |
3 - 631P1 |
1 |
 |
|
|
|
Signal generator 605-A [All Versions] |
1936 |
Equipment |
5 - 76 |
1 |
 |
23S |
|
|
Variac 200B |
1936 |
Equipment |
|
3 |
 |
1S |
|
|
Vacuum-Tube Voltmeter (Thermionic) 726-A [75] |
1936–38 |
Equipment |
3 - 955 |
12 |
 |
1S |
|
|
Heterodyne Frequency Meter 620-A [Rack Model] |
1937 |
Equipment |
|
2 |
 |
15S |
|
$ |
Modulated Oscillator 684-A [Battery] |
1937 |
Equipment |
|
1 |
 |
|
|
|
Modulated Oscillator 684A [AC supply] |
1937 |
Equipment |
|
1 |
 |
1S |
|
|
Heterodyne Frequency Meter 620-A [Portable Model] |
1937–53 |
Equipment |
|
1 |
 |
18S |
|
|
Megohm Bridge 544-B |
1937–61 |
Equipment |
|
8 |
 |
23S |
|
|
Signal generator 605-B [All Versions] |
1938 ? |
Equipment |
5 - 76 |
19 |
 |
1S |
|
$ |
Oscillator 608-A |
1938 ?? |
Equipment |
4 - 6F5G |
5 |
 |
8S |
|
|