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-   -   What is screen tap of transformer? (http://www.diyaudio.com/forums/tubes-valves/200612-what-screen-tap-transformer.html)

diyroger 16th November 2011 12:21 PM

What is screen tap of transformer?
 
Hello I'm new to tube. Now I'm planning to build my first tubeamp. The most difficult part of building a tube amp is wiring the transformers. Can any one tell me what is screen tap of a output transformer? I read this in an artical about how to make transformer, but don't have idea about what it is at all.

20to20 16th November 2011 12:34 PM

Search for info on the subject of "Ultra-Linear". The origins are from Acro Products.

toprepairman 16th November 2011 12:47 PM

Perhaps something a bit simpler and less potentially (in both senses) lethal might be a wise approach to learning something new.

FullRangeMan 16th November 2011 02:29 PM

It is the output of the electrostatic shield to be grounded.

aeandm 16th November 2011 02:32 PM

Quote:

Originally Posted by diyroger (Post 2783893)
Hello I'm new to tube. Now I'm planning to build my first tubeamp. The most difficult part of building a tube amp is wiring the transformers. Can any one tell me what is screen tap of a output transformer? I read this in an artical about how to make transformer, but don't have idea about what it is at all.

Hello, this is difficult .

Only mode is putting power transformer a great distance away .
Axis all transformers 90degree .

atandm

DF96 16th November 2011 03:06 PM

Quote:

It is the output of the electrostatic shield to be grounded.
No. Screen tap is a winding tap for the output valve screen grid, also known as g2.

Wiring the transformers is not the most difficult part of building a valve amp. Proper grounding, for both safety and noise, is probably the part which people most often get wrong. The mains side of the transformer is the most important part to get right, as getting this wrong can have serious life-threatening consequences.

FullRangeMan 16th November 2011 03:44 PM

Quote:

Originally Posted by DF96 (Post 2784086)
No. Screen tap is a winding tap for the output valve screen grid, also known as g2.

Wiring the transformers is not the most difficult part of building a valve amp. Proper grounding, for both safety and noise, is probably the part which people most often get wrong. The mains side of the transformer is the most important part to get right, as getting this wrong can have serious life-threatening consequences.

Thanks for informing.

speakerfritz 16th November 2011 07:53 PM

to keep things simple...PP output transformers can have 3 primary taps or 5 primary taps. Transformers that only have 3 primary taps are not capable of being used in amps configured for ultra-linear mode unless resistors are used between g1 and g2. transformer with 5 primary taps allow the amp to run in ultra-linear mode by connecting the 40% tap to g2. Not all designs require transformers that can support ultra-linear mode.

aeandm 16th November 2011 08:36 PM

Excuse me,I think You speak screening fields around transformers.
On power You make sectional is important for "out power". When You Uanode=1000V+600induction V between coil winding must are electrical strength
or screen. Here isn't simple solutions.

aeandm

payitforwardeddie 17th November 2011 09:03 AM

I am surprised that people are not killed attempting this.


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