radiomuseum.org

 
Please click your language flag. Bitte Sprachflagge klicken.

OBC3

Information - Help 
ID = 19812
       
Country:
Argentina
Brand: Philips Argentina, FAPESA, Miniwatt tubes; Buenos Aires
Tube type:  Double Diode-Triode   Audio Frequency 
Identical to OBC3
Similar Tubes
Normally replaceable-slightly different:
  12SQ7GT
Heater different:
  PBC3

Base Octal (Int.Octal, IO) K8A, USA 1935
Was used by Radio/TV-reception etc.
Filament Vf 12.6 Volts / If 0.15 Ampere / Indirect / Parallel / series AC/DC
Information source
 
cv546_so~~3.png
OBC3: ARRL Handbook 1972
Michael Schlör

 
obc3.png
OBC3: H.Weigl
Helmut Weigl


from Just Qvigstad

Usage in Models 1= 1947??

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1

Forum contributions about this tube
OBC3
Threads: 1 | Posts: 3
Hits: 5493     Replies: 2
Mysterious P-, O- and U- tube-series:
Jacob Roschy
07.Oct.07
  1
By doing research in the "Brans Tube Vademecum 1947", as well as in the "Röhren-Codex", I found 3 mysterious tube- series:
 
- an O - series with 0.15 A heater current, consisting of OBC3, OBF2, OCH4, OH4, OF1, OF5, OF9 and OM5.
 
By further investigating I found out, many of them are similar or equal to other better known tube types, some others differ only in heater data.
 
Here are the results as follows:
 
Equivalent types:
 
OBC3
12SQ7(-GT)
OH4
12A8(-GT)
OF1
6S7(-G-GT)
OF5
12K7(-G-GT)

Types with equal characteristics, but different heater voltage ( heater current = 0.15 A ) :

Type
equal charac-teristics to
same base diagram as
heater voltage
OBF2
EBF2
UBL1
8.5
OCH4
UCH4
UCH4
15
OF9
UF9
UF9
8.5
OM5
~UM4
UM4
12.6
 
  
- Next I found a P - series with 0.3 A heater current, consisting of PAB1, PBF2, PF9, PH4 and PM5.
 
Equivalent to other tube types are:
PF9
6K7(-G-GT)
PH4
6A8(-G-GT)
 
Types with equal characteristics, but different base diagram or heater data ( heater current = 0.3 A, voltage = 6.3 V ) :
Type
equal charac-teristics to
same base diagram as
PAB1
EAB1
EAB1
PBF2
~6B8(-G-GT)
6B8(-G-GT)
PM5
OM5
UM4
 
 
- At last I found an U - series with 0.1 A heater current, consisting of UBC1, UBF2, UF8 and UL1:
Types with equal characteristics, but different heater voltage ( heater current = 0.1 A ) :
 
Type
equal charac-teristics to
same base diagram as
heater voltage
UBC1
~UBC41
-
12.6
UBF2
EBF2
UBL1
12.6
UF8
EF8
-
12.6
UL1
~UL41
-
45
 
 
By investigating in the internet about these tubes, I found as follows:
 
 
a Radio type AL4112H, made by PHILIPS INDUSTRIA ARGENTINA is shown, which has the tube lineup: OH4 OF5 OBC1 50L6GT 35Z5GT.
 
The use of these O- types together with 50L6GT and 35Z5GT clearly profes the 0.15 A heater current of the O- tube series, unlike as in the polish "Universal Vademecum", as mentined in
 «Anybody knows this tuning indicator?» post 3 - (see also there).
 
 
 
shows another Philips set, Mod. AL552-H-61 ( 1942 ), also from Philips-Argentina,
tube lineup is: PH4 PF9 PF9 PBF2 PM5 25L6 25Z6.
 
The use of these P- types together with 25L6GT and 25Z5GT clearly profes the 0.3 A heater current of these P- tube series, also unlike as told in the polish "Universal Vademecum".
 
 
These interesting internet finds also shows to the South American market of the Philips company as the origin of these elsewhere mysterious tubes.
By now, I don't know, whether Philips produced these tubes in their mother company in the Netherlands especially for the South American market, or if PHILIPS INDUSTRIA ARGENTINA had an own tube production line there.
 
Best Regards,
Jacob Roschy
Juan Carlos FRANCO
30.Oct.09
  2

Hi Jacob !
sorry for my english.

Afterday i suscribe an new model for Philips Argentina
AL849 H this radio use this tubes !

OH4 OF5 OBC1 35Z5 50L6

Regads,

Juan Carlos Franco
Buenos Aires
Argentina

Jacob Roschy
31.Oct.09
  3

Hi Juan Carlos,

many thanks for this interesting contribution !

This tubes series released by Philips Argentina is still most unknown to the rest of the world, so any information about them is very welcome !

We tube collectors would be very delighted if you could post pictures of these tubes OH4, OF5 and OBC1 into their pages here in the RM.

Tanks in advance and best Regards,

Jacob

 
OBC3
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