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Old 12th January 2008, 11:26 PM   #1
davew is offline davew  United Kingdom
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Default 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?


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Old 13th January 2008, 12:55 AM   #2
jnb is offline jnb  Australia
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You could look here
for 7-pinners.
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Old 13th January 2008, 08:32 PM   #3
davew is offline davew  United Kingdom
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Thanks for the suggestion but unfortunately no luck

If it helps anybody I have found out it was a Sony TC200 tape recorder
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Old 14th January 2008, 01:15 PM   #4
wckong is offline wckong  Hong Kong
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Location: Hong Kong
Question Tube 5B

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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Old 14th January 2008, 03:19 PM   #5
aroS3 is offline aroS3  Greece
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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.
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