History of the manufacturer
Clapp-Eastham Co.; Cambridge, MA
As a member you can upload pictures (but not
single models please) and add text.
Both will display your name after an officer has activated your content, and will be displayed under «Further details ...» plus the text also in the forum.
Both will display your name after an officer has activated your content, and will be displayed under «Further details ...» plus the text also in the forum.
| Name: | Clapp-Eastham Co.; Cambridge, MA (USA) |
| Brand: |
 |
| Abbreviation: | clapp-east |
| Products: | Model types |
| Summary: |
Clapp-Eastham Company, 136 Main Street, Cambridge, Massachusetts was founded 1908 to manufacture C-ray equipment and wireless sets (from 1912). Clapp-Eastham moved to Brooklyn, NY about mid 1925. The company went out of business in 1929. |
| Founded: | 1908 |
| Closed: | 1929 |
| Production: | 1912 - |
| History: |
Clapp-Eastham Co.; 136 Mainstreet, Cambridge, Massachusetts - Trade name Radak. Clapp-Eastham made quite early sets like the Blitzen Receiver, Blitzen Tuner or D Receiver and D Tuner. Still during First World War they made also a Loose Coupler Navy Type and the Blitzen Short Wave Tuner, followed by their Radak receivers for Broadcasting, beginning 1922.
Probably the latest model was teh "Baby Emerson Loud Speaker Set" with the Mulivalve, as did Standard with its "Standardyne Multivalve Radio". |
Some models:
| Country | Year | Name | 1st Tube | Notes |
|---|---|---|---|---|
| USA | 12–15 | Blitzen Rotary Variable Condenser [1912 version] | ||
| USA | 23 | Radak A23 | RF amplifier and Det.(Audion). Needs Tuner with reaction (Radak R23 or similar). | |
| USA | 24 | Radak RHM (RH Macy) [.] | actually sold for $69.75. | |
| USA | 23 | Radak A4 [.] | more than one box matching amp. for the A4, to drive a horn speaker. | |
| USA | 23 | Radak C23 | UV201A | Three dials: OSC. CONTROL, ANT. IND., and R.F. CONTROL all used for tuning. Three rheos... |
| USA | 23 | Radak C3 | Three dials (primary tuning control knobs) | |
| USA | 23 | Radak C64 [.] | Three dials (primary tuning control knobs). "The set iscomplete, containing as it does a b... | |
| USA | 23 | Radak C63 [.] | Three dials (primary tuning control knobs) | |
| USA | 25 | Radak DD [.] | UV201A | Two dials (primary tuning control knobs) |
| USA | 27/28 | Baby Emerson Loud Speaker Set [.] | Multivalve | The Baby Emerson Loud Speaker Set uses the "Emerson Multivalve", a triple triode with a co... |
| USA | 24/25 | Radak Gold Seal | Two dials (primary tuning control knobs) | |
| USA | 22 | Radak HZ | Matches HR; oak box (mahogany version 40.-USD); |
[rmxhdet-en]
Further details for this manufacturer by the members (rmfiorg):
June 1922 Radio Broadcast magazine
July 1919 Electrical Experimenter magazine advertisement page 270 This advertisement mentions Bulletin Y which would then date the undated Clapp-Eastham Bulletin Y to 1919
June 1924 Radio News magazine advertisement page 1835
| Data Compliance | More Information |