| Hammarlund |
National |
RME |
RCA |
Other |
|
| Jun. 1931 |
RCA-RAB
(1) |
||||
| Sep. 1931 |
SW-3 (Q) |
||||
| Dec. 1931 |
Comet Allwave (2) |
||||
| Apr. 1932 |
Comet Pro Prototype (Q) |
||||
| Aug 1932 |
QST Xtal filter (Q) | ||||
| Sep. 1932 |
Comet Pro
(Q) |
||||
| Oct. 1932 |
AGS
(Q) |
||||
| Nov. 1932 |
Improved Comet Pro (Q) |
||||
| Jan. 1933 |
C-Pro, 57's
& 58's (Q) |
||||
| Feb. 1933 |
AGS bandspread (Q) | H&H Single Sig (Q) | |||
| Mar. 1933 |
Air-tuned IF's (Q) | FB-7 (Q) |
McMurdo Silver 3A Ham Super (Q) |
||
| July 1933 |
Comet Pro Xtal Filter (Q) | FB-X (Q) | |||
| Sep. 1933 |
McMurdo Silver 5A Single-Signal (Q) |
||||
| Oct. 1933 |
C-Pro 10M Coils (Q) | FB-7 Bandspread (Q) | |||
| Nov. 1933 |
C-Pro AVC (Q) | AGS-X (Q) | |||
| Dec. 1933 |
FB-XA (Q) | RME-9 (Q) | |||
| May 1934 |
R-Meter (Q) | ||||
| Oct 1934 |
HRO |
RME-9D (Q) | McMurdo Silver 5C (Q) | ||
| Dec 1934 |
RCA ACR-136 (Q) | ||||
| Jan. 1935 |
Hallicrafters Super-Skyrider (Q) | ||||
| Feb. 1935 |
HRO Bandspread Coils (Q) | ||||
| June 1935 |
Super-Pro Army contract (?) |
RME-9D 10 meters (Q) |
|||
| Sept.
1935 |
Hallicrafters S/SX-9 1936 Super Skyrider (Q) |
||||
| Oct. 1935 |
Breting 12 (Q) | ||||
| Nov. 1935 |
RCA AR-60 (Q) | ||||
| Dec. 1935 |
RME-69 (Q) | Patterson PR-16 (Q) | |||
| Mar. 1936 |
Super-Pro (Q) | BC-224(?) |
|||
| Apr. 1936 |
RCA ACR-175 (Q) | ||||
| Oct. 1936 |
DB-20 Preselector (Q) | Hallicrafters S/SX-11 1937 Super Skyrider (Q) |
|||
| Nov. 1936 |
NC-100 (Q) |