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Old 23rd March 2013, 04:33 PM   #1
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Question Mystery Telefunken T9 amp

Hi to all,

I am new to the DIY site. I hope i can give you guys some useful info from what i know of this great audio hobby.
I'm musician and DIY audio technician since my teens (and that was in the 60ies).


Right now i'm busy trying to figure out what unit i am working on. As far as I can find on the web it is a unit from a Telefunken T9 master recorder.
I found it sitting on the attic, waiting for me to restore it..
I remember that the guy that gave it to me many years ago said it had to do with an old Philips EL3500 master recorder that i bought from him. It came together with a headblock and a loose erase head. It might be an erase / bias amp but I am not shure..
Look at a webpage i made that has some images and comments:
telefunken_t9

While you're at it, also look at some links to other tube and audio projects:
EL3500
40watt-stereo-amp

If anyone has a schematic for me I would be very happy.
I took a go at it to draw one myself but the original stuff is always better to have.
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Old 23rd March 2013, 07:47 PM   #2
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Location: near Duesseldorf
Quote:
Originally Posted by adriaanhendrik View Post
Look at a webpage i made that has some images
Hello,

this looks like a head amp V67u (version with one EF804S and two EF12). The UY11 in the sockets are wrong.

Regards Andreas
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Old 23rd March 2013, 08:09 PM   #3
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Default wrong tubes

OK Andreas,

Thank you for the answer. I had my doubts about the UY11's too.
It was written with pen on the chassis next to the sockets. Obviously very wrong!
I will buy the EF12 tubes and put them in. I hope i can get hold of them via my tube provider.

Do you know where to get the original schematics?

Regards..
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Old 24th March 2013, 09:10 AM   #4
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Pls. V67u
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File Type: png V67u.PNG (832.3 KB, 118 views)
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Old 24th March 2013, 11:13 AM   #5
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Default v67u

Great..!! Now i can try to restore the unit. The guy who gave it to me years ago, must have taken all the transformers, relais and choke off the chassis for a DIY project of his own in the past, so now i must try to find the missing parts.. If anyone has them for me?
Anyway thank you very much for the schematics

many regards,
Ad
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Old 25th March 2013, 04:57 PM   #6
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Andreas,

Do you know how to get the right specifications of these in / out transformers so i can maybe order them from Cinemag company? Audio Transformers By Cinemag Inc.

regards,
Ad
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