What type of limiter is a Telefunken U373a ?

[Rob Flinn]

I always wondered what the gain control element was on this one ??

 

[Michael Krusch]

R7/28 and TR6/8 are building a voltage divider. The transitors are the variable part. You can find a detailed description here: http://www.irt.de/IRT/publikationen/braunbuch/U373A.PDF

 

[Rob Flinn]

Thanks for that Michael, but I cannot speak German.

Is there anyone who could translate or explain the bit I`m interested in please ?

 

[bcarso]

You could try pasting bits of it into babelfish, although I don't know how it will handle technical Deutsch :shock:

Wish there were a schematic. I know a little German but that's a lot of text!

 

[jensenmann]

on kubi´s page you find the schems:
http://www.kubarth.de/cgi-bin/diy/german/index#u
:sam:
Jens

 

[Rob Flinn]

Thanks guy`s

Kubi`s site doesn`t seem to be responding at the moment ??

 

[Guest]

Rob
You have probably seen it already but silent:arts has the following schemo
http://www.silentarts.de/lab/Studiotechnik/TAB/U373_Schematic.pdf
http://www.silentarts.de/lab/Studiotechnik/TAB/U373p_Schematic.pdf

From the index
http://home.datacomm.ch/gronerfamily/DIY/www.silentart.de/links.html

 

[Samuel Groner]

Is there anyone who could translate or explain the bit I`m interested in please?

Just a quick shot from page 2/3:
It's a feedback-topology. They use two transistors as voltage divider configured "push-pull" (if I got that right), which will linearise the characteristics over a wide range. Gain control is done by current injection into the bases.

Samuel

 

[Rob Flinn]

Thanks Samuel, that`s perfect.

 

[thekid777]

Would be glad to ask some help about the calibration of the u373a (schematic attached) anyone would know?
Thanks!

 

[thekid777]

data

 

[opacheco]

R7/28 and TR6/8 are building a voltage divider. The transitors are the variable part. You can find a detailed description here: http://www.irt.de/IRT/publikationen/braunbuch/U373A.PDF

Do someone have this PDF file?

Thanks anticipated!
opacheco

 

[rock soderstrom]

Just for you, opacheco! It is same document as in post #11. You can find old URLs with the waybackmachine.

 

[opacheco]

Just for you, opacheco! It is same document as in post #11. You can find old URLs with the waybackmachine.

rock soderstrom Thanks a lot!!

opacheco