Jose Master Volume question

novosibir · Post by **novosibir** » Wed Sep 05, 2007 11:15 pm

A 10V zener seems to be a bit too low, 20V zener sounds to me more correct.

Larry

rockstah · Post by **rockstah** » Wed Sep 05, 2007 11:15 pm

rockstah wrote:Larry, u have a part number for the zener diode i need?

im thinking this one? http://www.mouser.com/search/ProductDet ... 3-1N5357BG

novosibir · Post by **novosibir** » Wed Sep 05, 2007 11:27 pm

rockstah wrote:
rockstah wrote:Larry, u have a part number for the zener diode i need?

im thinking this one? http://www.mouser.com/search/ProductDet ... 3-1N5357BG

Sorry, no!

I've done some experiments w/ diodes in the amp layouts in the past. Diodes from the signal path to ground, and also diodes in the cathode circuit of the tubes. But it came up, that I hate diodes in the signal path. That's simply 'not my way'!

What I write now about the use of diodes in the signal path is theory and logic, not experience.

Larry

rockstah · Post by **rockstah** » Wed Sep 05, 2007 11:34 pm

novosibir wrote:
rockstah wrote:
rockstah wrote:Larry, u have a part number for the zener diode i need?

im thinking this one? http://www.mouser.com/search/ProductDet ... 3-1N5357BG
Sorry, no!

I've done some experiments w/ diodes in the amp layouts in the past. Diodes from the signal path to ground, and also diodes in the cathode circuit of the tubes. But it came up, that I hate diodes in the signal path. That's simply 'not my way'!

What I write now about the use of diodes in the signal path is theory and logic, not experience.

Larry

so if at 20v how many watts should it be?

how about? http://www.mouser.com/search/ProductDet ... 10-CZ5357B

novosibir · Post by **novosibir** » Wed Sep 05, 2007 11:36 pm

Is ok! Even a 1W type already wouldt have been plenty!

Larry

rockstah · Post by **rockstah** » Wed Sep 05, 2007 11:38 pm

ok then how about this one! http://www.mouser.com/search/ProductDet ... 78-1N4747A

novosibir · Post by **novosibir** » Wed Sep 05, 2007 11:40 pm

As I've already said - plenty

Larry

rockstah · Post by **rockstah** » Wed Sep 05, 2007 11:42 pm

ok. how much zener current will this diode being handling?

novosibir · Post by **novosibir** » Wed Sep 05, 2007 11:49 pm

rockstah wrote:ok. how much zener current will this diode being handling?

That depends on the voltage 'above' 10V, the diode has to kill.

Again easy to determine with Ohm's law!

P / U = I; I * U = P

Have you already read some books about basic electronics?

Larry

rockstah · Post by **rockstah** » Wed Sep 05, 2007 11:50 pm

this one!! http://www.mouser.com/search/Refine.asp ... r*+*diodes*

no?

MarkCameron · Post by **MarkCameron** » Thu Sep 06, 2007 3:07 am

Look for 1n747a

Anything from 8v to 20v. The lower the volts the more saturation.

1meg pot.....but you can use different values down to 100k

rockstah · Post by **rockstah** » Thu Sep 06, 2007 10:46 am

http://www.mouser.com/search/ProductDet ... 610-1N747A

its 3.6v?

MarkCameron · Post by **MarkCameron** » Thu Sep 06, 2007 11:13 am

rockstah wrote:http://www.mouser.com/search/ProductDet ... 610-1N747A

its 3.6v?

Sorry...... 1n4747a Left out the 4

rockstah · Post by **rockstah** » Thu Sep 06, 2007 12:31 pm

thanks Mark!

rockstah · Post by **rockstah** » Thu Sep 06, 2007 12:35 pm

this one? http://www.mouser.com/search/ProductDet ... -1N4747A-B