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Old 24th September 2018, 06:09 PM   #11
Nelson Pass is offline Nelson Pass  United States
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LateSit
Yes, great bench.

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Old 26th September 2018, 05:22 AM   #12
Pascal Nguyen is offline Pascal Nguyen  Australia
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Default Have Patience

Quote:
Originally Posted by juanitox View Post
i try to be patient
do you need gain or just a buffer to drive the amp ?
what is the value of the two zener ?
Hi Juanito,
Seems you are an expert in trench combat, hihi.
Get a piece of copper plate, cut it, drill holes, tape threads then polish it to perfection.
It is my interpretation of having patience.
For the DN2540, I drive it directly with my android phone, you might tailored it to suit your needs.
Zener, any will do with value higher than your source voltage and lesser than Vgs breakdown, I use 2 x 5V zener in série.


Cheers
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Old 26th September 2018, 05:26 AM   #13
Pascal Nguyen is offline Pascal Nguyen  Australia
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Quote:
Originally Posted by aspringv View Post
10/10 loving this just for the photos of your workbench.

The project looks pretty great too.
Not 10/10 yet, only 6/10 from my evaluation, I do need much better speakers and EMI free.
I need to have a tactfully negotiation with my superior to get some aluminium foil from her cupboard for shielding.

Cheers
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Old 26th September 2018, 05:31 AM   #14
Pascal Nguyen is offline Pascal Nguyen  Australia
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Quote:
Originally Posted by Nelson Pass View Post
Yes, great bench.

Thanks Mr Pass,

It is a result of copying Mr MR’bench, hi Michael.
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Old 26th September 2018, 05:35 AM   #15
Pascal Nguyen is offline Pascal Nguyen  Australia
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Location: Sydney
Default Preliminary test

I opted for DN2540 driver, the 6JP1 has to be on hold until EBay delivery for another 8$ populated board.
The circuit attached is not finalised yet, very simple to build.

Cheers


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Old 26th September 2018, 07:54 AM   #16
Chul is offline Chul  South Korea
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LateSit
Quote:
Originally Posted by Pascal Nguyen View Post
Hi Juanito,
Seems you are an expert in trench combat, hihi.
Get a piece of copper plate, cut it, drill holes, tape threads then polish it to perfection.
It is my interpretation of having patience.
For the DN2540, I drive it directly with my android phone, you might tailored it to suit your needs.
Zener, any will do with value higher than your source voltage and lesser than Vgs breakdown, I use 2 x 5V zener in série.


Cheers
Hi Pascal, that is a nice set of tapping screw you have!
Does the pink candle with tapping screws on it have some purpose?
I can't help my curiosity..

BTW the ground is connected to V+ and also the Source of lower DN2540 bias resistor. Is this done on purpose too?
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Last edited by Chul; 26th September 2018 at 07:57 AM.
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Old 26th September 2018, 05:05 PM   #17
juanitox is offline juanitox  France
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R3 must be linked to the negative supply ? something i don't understand
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Old 26th September 2018, 05:53 PM   #18
Zen Mod is online now Zen Mod  Serbia
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LateSit
yup

mistake with grounds in drawing

3 most left ones , need to go to neg. supply
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Old 26th September 2018, 08:30 PM   #19
Pascal Nguyen is offline Pascal Nguyen  Australia
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Quote:
Originally Posted by Chul View Post
Hi Pascal, that is a nice set of tapping screw you have!
Does the pink candle with tapping screws on it have some purpose?
I can't help my curiosity..

BTW the ground is connected to V+ and also the Source of lower DN2540 bias resistor. Is this done on purpose too?
Hi Chul,

Hawk eyed wise man

Pink candle, haha, poor man lubricants for threading and bicycle chain.

Source of lower DN2540 bias resistor to ground purposely, not an error.


Cheers



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Old 26th September 2018, 08:31 PM   #20
Pascal Nguyen is offline Pascal Nguyen  Australia
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Join Date: Sep 2016
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Default Having patience

Quote:
Originally Posted by juanitox View Post
R3 must be linked to the negative supply ? something i don't understand
If I can so do you
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