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Radak HR

Radak HR; Clapp-Eastham Co.; (ID = 2377122) Radio Radak HR; Clapp-Eastham Co.; (ID = 690925) Radio
Radak HR; Clapp-Eastham Co.; (ID = 690927) Radio Radak HR; Clapp-Eastham Co.; (ID = 690928) Radio
Radak HR; Clapp-Eastham Co.; (ID = 230183) Radio Radak HR; Clapp-Eastham Co.; (ID = 230184) Radio
Radak HR; Clapp-Eastham Co.; (ID = 266589) Radio Radak HR; Clapp-Eastham Co.; (ID = 524923) Radio
Radak HR; Clapp-Eastham Co.; (ID = 524932) Radio Radak HR; Clapp-Eastham Co.; (ID = 690931) Radio
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Radak HR; Clapp-Eastham Co.; (ID = 2377122) Radio
Clapp-Eastham Co.;: Radak HR [Radio] ID = 2377122 1400x1459
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For model Radak HR, Clapp-Eastham Co.; Cambridge, MA:
Collection privée (réf.: 0102, 640)
Country:  United States of America (USA)
Manufacturer / Brand:  Clapp-Eastham Co.; Cambridge, MA
Year: 1921/1922 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 1:
schematic requested
Main principle TRF with regeneration
Tuned circuits 1 AM circuit(s)
Wave bands Broadcast only (MW).
Power type and voltage Storage and/or dry batteries
Loudspeaker - For headphones or amp.
Power out
from Model: Radak HR - Clapp-Eastham Co.; Cambridge,
Material Wooden case
Shape Tablemodel, Box - most often with Lid (NOT slant panel).
Notes Two dials (primary tuning control knobs) ; oak box(mahogany version 40.-USD); matching amplifier Radak HZ;
Price in first year of sale 35.00 $
Collectors' prices  
External source of data Ernst Erb
Source of data Radio Collector`s Guide 1921-1932
Mentioned in Collector's Guide to Antique Radios 4. Edition
Literature/Schematics (1) Radio Manufacturers of the 1920s, Vol 1

All listed radios etc. from Clapp-Eastham Co.; Cambridge, MA
Here you find 125 models, 98 with images and 2 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.


Forum contributions about this model
Clapp-Eastham Co.;: Radak HR
Threads: 1 | Posts: 2
Hits: 1958     Replies: 1
HR Clapp-Eastham Radio question
Rob Huiskamp


I just purchased a Clapp-Eastham Radio HR type 1 tube. I don't know what type of tube was used. Also the two dials are numbered 100 (Left side)  0 (Right side)  would these be original? Most pictures have the opposite 0 (Left side) 100 Right side). Any schematics availabe? I still very new to this hobby any help would be appreciated. Thanks. Rob

Alan Scott Douglas † 16.11.15

Usually a UV200 was used, or whatever the owner might already have or could afford (VT1, bootleg tubes, an Audiotron in an adapter, etc.)


If the dials are marked "condenser" and "tickler" they are original. If not, they probably aren't.  I have never seen a Clapp-Eastham dial with reverse numbering. 


If you need details of wiring that aren't visible in the photos already on the model page, I can upload more.

Clapp-Eastham Co.;: Radak HR
End of forum contributions about this model