PS design for tube pre-amp

[tony Ma]

Hi there any one can help me design pre-amp tube

What the Pre-amp tube are 400V AC(100mA) and one two 12.6V AC(1A)

The transformer can supply 320V(100mA) and 0-18V(1A)

Tks

 

[DF96]

I assume you mean 400V DC at 100mA? That seems a lot for a preamp, and too much for your transformer. A 320V 100mA AC secondary will provide perhaps 40mA DC from a capacitor input PSU.

 

[nigelwright7557]

I designed a disco valve mixer and used 110VDC. 110VDC is safer to work with for a newbie but will still bite a bit.

Do you want valve rectification or solid state ?

 

[tony Ma]

@DF96 : Yes, the pre-amp input V are in DC

@nigelwright7557, I am guessing better with Valve rectification? What do you think?

To be honest I am just looking design that cheapest and very good PS (lol...)

Help me please.... I am learning a lot from this site

 

[Elvee]

If your figures are right, your transformer is about three times too small for that application

 

[tony Ma]

Any one?

 

[JMFahey]

What the Pre-amp tube are 400V AC(100mA)

How do you know your preamp needs 400V DC and needs 100mA current?

and one two 12.6V AC(1A)

"one two?" 😕
How many and which tubes does your preamp use?

Hint: a schematic would be useful.

 

[tony Ma]

How do you know your preamp needs 400V DC and needs 100mA current?

This is what i got from the user manual


"one two?" 😕

Meaning there is also one output (from PS PCB) and going to TWO (in for Pre-amp PCB)


How many and which tubes does your preamp use? (6 Pcs. this is clone of JP200)

Hint: a schematic would be useful.

http://www.diyaudio.com/forums/power-supplies/230726-there-any-thing-wrong-design.html

 

[JMFahey]

How do you know your preamp needs 400V DC and needs 100mA current?

This is what i got from the user manual

Sorry but which user manual?
On your OP you refer to

help me design pre-amp tube

How can you have a user manual for something that's not yet designed?😕

How many and which tubes does your preamp use? (6 Pcs. this is clone of JP200)

"6 pcs" ..... of *what*?
Don't know what a JP200 is, that's why I asked a schematic of what you are building.

Hint: a schematic would be useful.

http://www.diyaudio.com/forums/power-supplies/230726-there-any-thing-wrong-design.html

Sorry, no Preamp schematic to be found there.

 

[tony Ma]

I have this pre-amp as DIY kid from analog metric

My first experience building the kit

it was horrible the original kit that they have (a lot of hum)

so I decided to follow this guy Norbert R

Tube DIY Asylum

I change all the resistor, capacitor and sound become so amazing .... way better than original one

but I still have the problem with the Power supply. In Norbert R, he has PS200 ( http://analogmetric.com/download/Variable Tube Voltage Regulator PS200 User Manual.pdf ) and I have regular one ( HV400 Variable High Voltage Regulator Kit (100-300V 0.1A & 0-30V 5A)_Power Supply Kit_Analog Metric - DIY Audio Kit )

Well at that time I did not know much about which PS I should use and they send me the kit

here is the link for user manual
Pre-amp
Tube DIY Asylum

I hope this will clear up