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Old 11th February 2013, 09:47 PM   #1
tony Ma is offline tony Ma  United States
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Default PS design for tube pre-amp

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
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Old 11th February 2013, 10:25 PM   #2
DF96 is offline DF96  England
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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.
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Old 11th February 2013, 10:51 PM   #3
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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 ?
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Old 12th February 2013, 02:34 AM   #4
tony Ma is offline tony Ma  United States
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@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
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Old 12th February 2013, 06:45 AM   #5
Elvee is offline Elvee  Belgium
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If your figures are right, your transformer is about three times too small for that application
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Old 31st March 2013, 05:39 PM   #6
tony Ma is offline tony Ma  United States
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Any one?
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Old 31st March 2013, 06:04 PM   #7
JMFahey is offline JMFahey  Argentina
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Quote:
What the Pre-amp tube are 400V AC(100mA)
How do you know your preamp needs 400V DC and needs 100mA current?

Quote:
and one two 12.6V AC(1A)
"one two?"
How many and which tubes does your preamp use?

Hint: a schematic would be useful.
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Old 31st March 2013, 06:09 PM   #8
tony Ma is offline tony Ma  United States
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[QUOTE=JMFahey;3435605]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.

Is there any thing wrong with this design
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Old 31st March 2013, 08:45 PM   #9
JMFahey is offline JMFahey  Argentina
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[QUOTE=tony Ma;3435611]
Quote:
Originally Posted by JMFahey View Post
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
Quote:
help me design pre-amp tube
How can you have a user manual for something that's not yet designed?
Quote:
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.
Quote:
Hint: a schematic would be useful.

Is there any thing wrong with this design
Sorry, no Preamp schematic to be found there.
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Old 2nd April 2013, 08:42 AM   #10
tony Ma is offline tony Ma  United States
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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/Var...r%20Manual.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
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