!!!Newbie topic ;-) 12v to 9v regulator

[naca5]

Hi,

I would like to run a 9vdc powered preamp with a 12v car battery.
I guess a need a voltage regulator? right?

Any advice for assembled one?

Thanks
C

 

[AndrewT]

Does the preamp only work with a 9Vdc supply?

 

[JonSnell Electronic]

I would use a 7809 regulator. 100uF and 0.1uF 25v input to ground. 0.1uF output to ground. The ground is the tab and 2nd pin.No need for anything more complicated. In the example forget the bridge rectifier as that will be your battery input.
Design of 9 V regulator using 7809 with circuit diagram and schematics

 

[naca5]

Does the preamp only work with a 9Vdc supply?

Yes only 9vdc, it's a tiny one
[IMGDEAD]http://www.head-fi.org/content/type/61/id/1020610/width/500/height/1000/flags/LL[/IMGDEAD]

 

[naca5]

I would use a 7809 regulator. 100uF and 0.1uF 25v input to ground. 0.1uF output to ground. The ground is the tab and 2nd pin.No need for anything more complicated. In the example forget the bridge rectifier as that will be your battery input.
Design of 9 V regulator using 7809 with circuit diagram and schematics

Thanks Jon, but I'm not able to solder such thing ...

 

[sreten]

Hi,

They claim input voltage must be 9V +/- 10%, 8V to 10V.
I guess that must be because of the valve heater supply.

Its relatively trivial to knock up the required regulator,
in a small box, wired into the connecting cable. If you
can't do it ask someone here, someone probably will.

Personally I am suspicious of most of the guff.

rgds, sreten.

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[rayma]

I would like to run a 9vdc powered preamp with a 12v car battery.

These should work. You'll need to add suitable connectors to the wires.
Waterproof DC DC Converter 12V Step Down to 9V 3A 15W Power Supply Module | eBay
Waterproof DC DC Converter 12V Step Down to 9V 3A 15W Power Supply Module | eBay

 

[naca5]

thanks for your inputs guys, will try with this chinese thing.

 

[fabrice63]

be care of the overal performance given by these "chinese stuff" , a good LDO and low noise regulator will better fit ;-)

the sound quality depends on the supply quality ;-)


.

 

[rayma]

thanks for your inputs guys, will try with this chinese thing.

Be very careful in hooking it up. Observe the DC voltage polarity at both the input and output,
and if you have a meter double check with that, before connecting to your circuit.

 

[naca5]

thanks for advices and tricks ;-)
At the opposite of Chinese stuff what do you think about this one?
Rather expansive isn't it?

 

[rayma]

thanks for advices and tricks ;-)
At the opposite of Chinese stuff what do you think about this one?
Rather expansive isn't it?

Forgot your link.
Remember that all of Apple's phones are made in China.

 

[nigelwright7557]

I suspect you will need a heat sink for the regulator too.

 

[naca5]

Forgot your link.
Remember that all of Apple's phones are made in China.

Thanks...

 

[JMFahey]

What is that glass tube thingie in the middle of the PCB supposed to do?
Do you have a schematic?

 

[naca5]

No schematic I'm afraid,
this a tube buffer/preamp based on 5670 valve