Unknown Tube

[el156]

Hi
I found some of this tubes , but there is nothing that indicates the type, but know pin 4 & 5 are heaters, pin 9 is conected to the shield...any ideas by the photos ?
thanks

 

[Ketje]

Looks something like a ECC88 (or PCC).
Mona

 

[mctavish]

I have some Amperex 6DJ8's that look IDENTICAL to these...

 

[zal]

It may be ECC88/6DJ8, PCC88/7DJ8, ECC189/6ES8/CV5331, PCC189...
CV5531 / ECC189 / 6ES8

 

[Ketje]

I have some Amperex 6DJ8's that look IDENTICAL to these...

A 6DJ8 is a ECC88 🙂
Mona

 

[el156]

Thanks for the replies
maybe the best way to know what they are, would be to conect them to a circuit ,and try to measure the voltages in plate and cathode ? say make the grid voltages -1v ,-2v, -3v, and see the variation in the plate voltage ?

 

[DF96]

It appears to have a Philips-type glass seam on top so it should have an etch code near the bottom.

 

[v4lve lover]

Post a Photo of the codes on the side.

Philips production codes
DJ PCC88
[FONT=Verdana, Arial, Helvetica]Cm [/FONT][FONT=Verdana, Arial, Helvetica]GA ECC88 [/FONT]
[FONT=Verdana, Arial, Helvetica]OP PCC89
[/FONT][FONT=Verdana, Arial, Helvetica]IP PCC189
[/FONT][FONT=Verdana, Arial, Helvetica]IX ECC189[/FONT]