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A tube which is not known by Google

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Jacob Roschy Ernst Erb Martin Renz Bernhard Nagel 
 
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Forum » Valves / tubes - Semiconductors » Very rare valves or unknown (not in RMorg) » A tube which is not known by Google
           
Ottó Jancsek
Ottó Jancsek
 
H  Articles: 7
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Pict.: 10
01.Nov.19 18:51

Count of Thanks: 2
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Does anybody know about this guy?

It's a full wawe rectifier, made by Tungsram. The base is Europe 4-Pin. Similar to the PV 200/600 but the plate is shorter:42mm->34mm. The sign clearly says 4Ц188C and 4C188. But this type isn't known by Google.

Otto

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Jacob Roschy
Jacob Roschy
Moderator
D  Articles: 1617
Schem.: 17
Pict.: 69
02.Nov.19 17:33
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Hello Ottó,

unfortunately I don't know anything about this tube, but I have introduced tube pages for both types 4Ц188С and 4C188. You can upload pictures there.

Best Regards,
Jacob

 

 

 

 

Jacob Roschy
Jacob Roschy
Moderator
D  Articles: 1617
Schem.: 17
Pict.: 69
02.Nov.19 21:09
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I suspect this a Tungsram version of the ВО-188. Can you check the heater current at 4 V ?

Best Regards,
Jacob

Gabriel Toth
Gabriel Toth
Editor
CZ  Articles: 110
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Pict.: 484
02.Nov.19 22:15
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Dear Colleagues,

I have the same feeling, that in reality it is tube ВО(VO)-188. On end of 30`s in USSR have been started a new system of tube coding. Until 1937 abbreviation ВО meant "oxid-rectifier", ВО-188 is a 4V dual rectifier, since 1937 first label should be heating voltage - 4, second label rectifier - "Ц" and the rest of old number, "С" on end like stjeklo-glas. But in case of old, existing tubes this coding was not used at all, at newly introduced tubes only...

Gabriel 

This article was edited 02.Nov.19 22:28 by Gabriel Toth .

Ottó Jancsek
Ottó Jancsek
 
H  Articles: 7
Schem.:
Pict.: 10
03.Nov.19 01:48

Count of Thanks: 2
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Hello Jacob,

Your idea about BO188 looks right. I measured 2.27A heater current @4V.

Best regards,

Ottó

Jacob Roschy
Jacob Roschy
Moderator
D  Articles: 1617
Schem.: 17
Pict.: 69
04.Nov.19 10:35
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Hello to all,

I can't imagine that this 4Ц188С is anything else then an equivalent to the ВО-188.
The number 188 was not chosen at random.

Best Regards,
Jacob

 

Ottó Jancsek
Ottó Jancsek
 
H  Articles: 7
Schem.:
Pict.: 10
04.Nov.19 18:12

Count of Thanks: 1
Reply  |  You aren't logged in. (Guest)   7

Hello all,

Thank You for your help.

Best regards,

Ottó

  
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