Anybody help identify these tubes

davew · 12th January 2008, 11:26 PM

Hi, I have been given some Toshiba tubes marked 5B they are 7 pin and come out of a Sony Tape recorder, I was also given a pair of output transformers for these (8ohm sec 2.5k primary).

I would like to build a small iPod amp for my daughter using these.
Can anybody help me with any technical info on the pinouts/specs?

Thanks

Dave

jnb · 13th January 2008, 12:55 AM

You could look here
Duncanamps
for 7-pinners.

davew · 13th January 2008, 08:32 PM

Thanks for the suggestion but unfortunately no luck

If it helps anybody I have found out it was a Sony TC200 tape recorder

wckong · 14th January 2008, 01:15 PM

Hi,
I can find some info in a Japanse tube book about Tube 5B (Electrons) Type : 2R+2R , Ef (V) 2,5 , If (A) 12 , Ep(V) 120
Ip (mA) 5A

I don't know what is 2R+2R ? ? ?

I suppose that "Electrons "is the make , it is not " Toshiba ".

Hope the above info helps...

aroS3 · 14th January 2008, 03:19 PM

I've also the same reel recorder, Sony TC200. I 've never opened the trunk so i don't know either the tube types.
If you find any info's about them or better a service manual, please let us know.
Regards
George

12th January 2008, 11:26 PM	#1
davew diyAudio Member Join Date: Nov 2006	Anybody help identify these tubes Hi, I have been given some Toshiba tubes marked 5B they are 7 pin and come out of a Sony Tape recorder, I was also given a pair of output transformers for these (8ohm sec 2.5k primary). I would like to build a small iPod amp for my daughter using these. Can anybody help me with any technical info on the pinouts/specs? Thanks Dave

14th January 2008, 01:15 PM	#4
wckong diyAudio Member Join Date: Jan 2007 Location: Hong Kong	Tube 5B Hi, I can find some info in a Japanse tube book about Tube 5B (Electrons) Type : 2R+2R , Ef (V) 2,5 , If (A) 12 , Ep(V) 120 Ip (mA) 5A I don't know what is 2R+2R ? ? ? I suppose that "Electrons "is the make , it is not " Toshiba ". Hope the above info helps...

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13th January 2008, 12:55 AM	#2
jnb diyAudio Member Join Date: Dec 2006	You could look here Duncanamps for 7-pinners.

13th January 2008, 08:32 PM	#3
davew diyAudio Member Join Date: Nov 2006	Thanks for the suggestion but unfortunately no luck If it helps anybody I have found out it was a Sony TC200 tape recorder

14th January 2008, 03:19 PM	#5
aroS3 diyAudio Member Join Date: Nov 2005	I've also the same reel recorder, Sony TC200. I 've never opened the trunk so i don't know either the tube types. If you find any info's about them or better a service manual, please let us know. Regards George

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