radiomuseum.org

 
Please click your language flag. Bitte Sprachflagge klicken.

GRDIII

Information - Help 
ID = 49851
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Triode, vacuum 
  Ca. 1925 up to 1945 rare.
Identical to GRDIII = 4603_PHILIPS

Base Europe 4-Pin (A, 4A, B4, since 1914)
Filament Direct
 
nl_grdiii4603.jpg
GRDIII: own collection
John Koster

 


Forum contributions about this tube
GRDIII
Threads: 1 | Posts: 3
Hits: 1585     Replies: 2
GRDIII (GRDIII)
John Koster
23.Dec.10
  1

GRD-tubes were used in municipal wire broadcasting networks (G.R.D., Gemeentelijke Radio Distributie) in the 1920s and 1930s in the Netherlands. It als bears the Philips number 4603. These were a series of tubes in the range 4600-4700 for professional use.

Emilio Ciardiello
23.Dec.10
  2

Dear John,

it is not clear whether GRDIII was a tube or a radiocontrolled distribution system based upon professional 4600-4700 series Philips tubes.

In the text you refer to a series of tubes in the range 4600-4700. But you also write of GRD tubes and all the text is linked to a single GRDIII tube. Do you have more details about?

Many thanks,

Emilio

John Koster
23.Dec.10
  3
Dear Emillio,
 
All Philips GRD (followed by a Roman figure, e.g. II or IV) tubes were used in municipal wire distribution systems in the Netherlands. Most of them were also part of a series of Philips tubes numbered from 4600 to 4700. The GRDIII is also a 4603 tube. The tubes in the 4600 to 4700 range were made for professional use. Some of them have a commercial equivalent. For instance 4610 = E442 and 4693= EF8.
 
Regards,
 
John
 
GRDIII
End of forum contributions about this tube

You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]
  
rmXorg