Power supply for JLH2003 & F5 Amplifier

[potstip]

Hello;

I want to build an amplifier which includes 2 amplifier instead;

For Pass F5 and JLH2003, but want to use same power supply for both. -+22v.

JLH2003


F5
1.3A bias 40W 4ohm 25W 8ohm as far as i know.

But i do not know how much amp they draw i think it is important to calculate voltage raiting in troidal.

I do not have any knowledge about electronic but i am good at mechanical things. So i build a case i alittle bit overkill i guess but nevermind my problem is define the secondary voltage troidal transformer according to setup here below;

Input/primary is 220v 50hz
I will use soft start
i will use CLC setup.
Rectifier: 2X IXYS VBE17-06NO7
Capacitor 8x Sikorel B41570E7479Q
Choke: 2X 195J10
Troidal will be 1500VA (750VA for each channel) %4-5 regulation probably.

So;

Can anybody tell me is there something wrong in my setup to run both amplifier with same PSU and what will be the voltage in troidal transformer

 

[Zen Mod]

2x18Vac

meaning - two independent 18Vac secondaries , one bridge per winding

so , dual bridge setup , same as in F5 user/service manual

 

[potstip]

Hello Zen thank you for quick response. Do you think my setup here above is work well?

 

[Zen Mod]

yup

but - be sure that you put all gnd wires on that central bolt (other side from bridges) , including feed from bridges

if you need sketch , say

 

[potstip]

Sorry if my question is annoyying;

1)Do you want me to open a new screw hole in the middle of copper ground (red marked in IMG_2999.jpg picture) or want me to collect other grounds to blue square. Please my stetch in attachments.

2)I try to make simulation with my poor knowledge as see in attachments adsiz.jpg;

If amplifier draw 10A and input is 18V my output seems 19.4V is this normal?

 

[Zen Mod]

F5 will draw ~ 160W both channels
JLH probably less

depending of Rdc of chokes , you'll need slightly more than 18Vac secondaries

if you can live with 20-21Vdc rails , go for 18Vac secs

if you can get custom secondaries for same money , go for 2x20Vac

 

[potstip]

In the spesifications of Choke resistance is 0.07Ohm but I am not sure that resistance will be same in ~20Vdc input.

 

[Zen Mod]

just go for it

regarding PSUD sim - you'll probably have some 3A5 for F5 and some 2A for JLH

that's substantially lower than 10A

 

[AndrewT]

Sorry if my question is annoyying;

1)Do you want me to open a new screw hole in the middle of copper ground (red marked in IMG_2999.jpg picture) or want me to collect other grounds to blue square. Please my stetch in attachments.

2)I try to make simulation with my poor knowledge as see in attachments adsiz.jpg;

If amplifier draw 10A and input is 18V my output seems 19.4V is this normal?

Do not make an extra connection in the middle of that zero volts plate.

Power from the transformer/rectifier comes in at one END. Power leaves to feed the amplifier from the other END.
You can make the Safety Connection to Chassis from this plate, but this could be from many other wires/cables in the assembly.
No other connections are made to the zero volts plate. Just the input and the output at opposite ENDs.

ZenMod's drawing in post6 seems to show different.
Get him to explain why his drawing will not put Hum and Buzz into the amplifier cabling.

 

[Vrystaat]

Andrew, I'm with you on this one.

 

[potstip]

Andrew could you please draw your suggestion. It is so much better for the newbees like me.

 

[AndrewT]

I can certainly draw it.
I have just borrowed a camera and could post a pic, if it can download to my PC.
Maybe later tonight.

 

[potstip]

Any news Andrew

I can certainly draw it.
I have just borrowed a camera and could post a pic, if it can download to my PC.
Maybe later tonight.

Is there any news Andrew. Thanks in advance.

 

[AndrewT]

Not yet.
It is warming up a lot and I am going up on the roof to erect my new TV aerial. 1°C yesterday and 9°C today and enough daylight left to finish the job.

 

[brunogiovs]

Hello;

I want to build an amplifier which includes 2 amplifier instead;

For Pass F5 and JLH2003, but want to use same power supply for both. -+22v.

JLH2003
View attachment 591513

F5
1.3A bias 40W 4ohm 25W 8ohm as far as i know.

But i do not know how much amp they draw i think it is important to calculate voltage raiting in troidal.

I do not have any knowledge about electronic but i am good at mechanical things. So i build a case i alittle bit overkill i guess but nevermind my problem is define the secondary voltage troidal transformer according to setup here below;

Input/primary is 220v 50hz
I will use soft start
i will use CLC setup.
Rectifier: 2X IXYS VBE17-06NO7
Capacitor 8x Sikorel B41570E7479Q
Choke: 2X 195J10
Troidal will be 1500VA (750VA for each channel) %4-5 regulation probably.

So;

Can anybody tell me is there something wrong in my setup to run both amplifier with same PSU and what will be the voltage in troidal transformer

wow... that's a kick *** psu, 1500va ... wow ... why you decided to go so big on the psu?

I'm planning to build a f5 and I was thinking a crc with 300va trans ... may be some more capacitance that recommend...

 

[potstip]

It is a little bit overkill i guess, i just enjoy to look at it

 

[potstip]

Not yet.
It is warming up a lot and I am going up on the roof to erect my new TV aerial. 1°C yesterday and 9°C today and enough daylight left to finish the job.

any news Andrew

 

[AndrewT]

Found the camera. It was mislaid over Christmas.