Trust, the most delicious Dx Amplifier

[destroyer X]

Supply voltage to the Trust amplifier is 36 volts

So, no condenser or capacitor will need more insulating voltage than 35 Volts.... if you want some more insulating voltage you can use of course...but really not needed.

I told that bootstrap electrolitic and zobel needed higher insulating voltage but was my mistake.

Nothing there needs more than 35 volts.

regards,

Carlos

An externally hosted image should be here but it was not working when we last tested it.

 

[taj]

Okay,

I think this has everything.

Alex, there are some additional capacitors and trimpots here, so you will have to modify your PCB design.

..Todd

 

[taj]

Disregard the earlier ones that El Carlos "Quickdraw" posted.


Here's photo of him shooting flies. It's actually a video, but he's so fast you can't see him move.

..Todd

 

[Greg Erskine]

Note to self (me not Doug): Never send Carlos preliminary schematics, because he posts them with problems and that causes endless confusion. I will put big "DRAFT ONLY - DO NOT POST" markings on it. Making them too big is a good idea, but it doesn't stop him. 😎

The final one is not ready yet, but it will be uploaded here when the QC department has approved it.


..Todd

ha ha 😀

Note 2: There is no QC department.

ha ha

See you april.


regards

 

[destroyer X]

You were my quality department..but you decide to abandon

big fat crazy Charlie..... a pitty.

ahahahahahah!

regards,

Carlos

 

[destroyer X]

I gonna post a lot of images that i could obtain from some Alexmm files

attached 1

regards,

Carlos

 

[Juergen Knoop]

Please, do not even try to discuss theories not to atract boring theorists to come here...

no problem Carlos!
The link was just for your circuit collection. I know you are an addict 😉
One of the related designers, Mr. Haas, has written books and articles about audio electronics and runs a small audio-kit selling company.
regards

 

[destroyer X]

Another image.

I will post, after the end of those illustrative images, my own idea about with dimensions.

regards,

Carlos

 

[destroyer X]

Alles gut her Juergen.

Kein problem.. alles blau unt alles gut.

Auf wiederlehsen

Karl


..............................................................

No problem... it is all rigth... everything blue and everything fine

Bye

Carlos

 

[destroyer X]

Here attached the third image

regards,

Carlos

 

[destroyer X]

Now i will attach the fouth image.

after wait the forum timing between pictures (boring that thing)

regards,

Carlos

 

[destroyer X]

The fifth one

Alex sent me a viewer...and the files... and i had to discover those things.

Was difficult to me..he is busy..and i do not know how to do those things...was not easy..but seems i could do it.

regards,

Carlos

 

[destroyer X]

This is the last image extracted from the viewer Alexmm sent me

so... i will enter with my vision about those things and my files about,

regards,

Carlos

 

[destroyer X]

I found that copper lines has different dimensions compared to the whole board

So i had to measure once again and prepare those informs to you.

This image shows the copper lines only..but board is bigger..we need room to parts that are fat (electrolitic condensers goes out from the board if it is small).... also trimpots.... also transistors need space (power units)...also we need room for holes to attach board to the chassis or heatsink using screws.

regards,

Carlos

 

[destroyer X]

Into this image i am explaining the details

Because there are two main dimensions...the copper tracks area and the fiberglass board area..... so...there are two dimensions..one to cut your board..and other to order printer to prepare your transparence or lazer printer copy to hot iron transference.

regards,

Carlos

 

[destroyer X]

Here you have the image from the copper track are only

The copper track dimensions are:

Heigth 60 milimeters
Width 77 milimeters


The board dimensions are:

Heigth 91 milimeters
Width 60 milimeters


regards,

Carlos

 

[destroyer X]

Thank you by the new wonderfull schematic you have prepared to us

dear Todd Johnson (TAJ)

regards,

Carlos

 

[mjd_tech]

Hi Carlos,
Not trying to be a "theorist" here. Just curious.
Why all the 7.5pf caps on the output transistors?
I guess they have something to do with stability, to prevent oscillation.
Or maybe to allow various transistor types to be substituted.
Or maybe they roll off some higher harmonics to give warm lush tone...

Regards,
Mike

 

[destroyer X]

To prevent oscilation.

regards,

Carlos

 

[destroyer X]

The two extra capacitors we have included into the official schematic published by

dear Todd are usefull but you can survive without them if you need.

Also you can install them under the board as they are small ceramic 104 capacitors.

The trimpot can be substituted by two resistances in series if needed.

So, do not worry about board... the one made by Alex mm is good enougth to be used... this is a DIY circuit... also a DIY board.... not a challenge to perfection....so.... some small capacitors under the board can be used.

Also paralell resistances if needed can be used too... the musical and sonic "spirit" will not disappear without a perfect construction...do not worry with those small things.... better to worry about speakers as they are a hell bad things we have.

Ancient air pumps that distorts a lot!

regards,

Carlos