A tube which is not known by Google

ID: 531316
? A tube which is not known by Google 
01.Nov.19 18:51
79

Ottó Jancsek (H)
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Ottó Jancsek

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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 2
A tube which is not known by Google 
02.Nov.19 17:33
79 from 1601

Jacob Roschy (D)
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Jacob Roschy

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

 

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 3
A tube which is not known by Google 
02.Nov.19 21:09
108 from 1601

Jacob Roschy (D)
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Jacob Roschy

I suspect this a Tungsram version of the ВО-188. Can you check the heater current at 4 V ?

Best Regards,
Jacob

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 4
A tube which is not known by Google 
02.Nov.19 22:15
116 from 1601

Gabriel Toth (CZ)
Editor
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Gabriel Toth

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 

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 5
A tube which is not known by Google 
03.Nov.19 01:48
136 from 1601

Ottó Jancsek (H)
Articles: 49
Count of Thanks: 9
Ottó Jancsek

Hello Jacob,

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

Best regards,

Ottó

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 6
A tube which is not known by Google 
04.Nov.19 10:35
202 from 1601

Jacob Roschy (D)
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Articles: 1778
Count of Thanks: 8
Jacob Roschy

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

 

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 7
A tube which is not known by Google 
04.Nov.19 18:12
239 from 1601

Ottó Jancsek (H)
Articles: 49
Count of Thanks: 7
Ottó Jancsek

Hello all,

Thank You for your help.

Best regards,

Ottó

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