Paradise Builders

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deadhead

Member
Joined 2008
deadhead said:
Whilst on the subject of swaps...

In my GB bag i did not receive any 147K resistors but I did get 4x 2k resistors that I don't think are anywhere on the boards. I also received 16x 150k when I only needed 4x.

Did anyone get more 147k than they needed and could they swap with me or if you don't need any swaps could you send me their spare 147's please?
Click to expand...


Does anyone have any spare Dale 147k that I could buy from them please.
 
B

brozatus

Member
Joined 2006
Hello,

I would be very happy if anyone of you finds the time to check the values of Joachims schematic or can verify them.

Can you try to simulate JG's circuit?

My testing transformators are only nominal 2x24 volts but I think there is something wrong?

I do not want to burn my Paradise,

Thank you very much,
Christoph
 
RCruz

RCruz

Member
Joined 2006
Paid Member
brozatus said:
I also have plus/minus 81,5 V AC between plus/minus vdc and ground and
163 V AC between plus vdc and minus vdc
Click to expand...

Please explain.

Do you mean you measured AC volts after the rectifiers ?

The circuit you are using is very good... there is no way you can get AC after the rectifiers.

You posted you measured 27 AC volts before the rectifiers... that would give you 37VDC after the rectifiers.... seems ok but as the paradise runs with 18VDC, the shutnts will need to "burn" 20VDC n heat.... maybe you should "loose" some volts with an RC circuit.
 
studeb

studeb

Member
Joined 2008
So between the red and black, you have AC?
Between the black and blue you have AC?

Can you post a picture of your pre-reg?

Is the black gound tied to anything, or is it floating?
 

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B

brozatus

Member
Joined 2006
Hello Studeb,

thanks for your helping!

Yes, I have ~81v ac between red and black, the same between black and blue.
After putting 540R to red and black I measure ~64v ac in parallel.

"Is the black gound tied to anything, or is it floating"
Sorry, my english is too bad, I'm not sure about "floating",
the black ground is connected like is is in the schematic.

Regards,
Christoph
 
RCruz

RCruz

Member
Joined 2006
Paid Member
brozatus said:
@Rcruz,

yes, as I said, I measure AC volts after the rectifiers.

see the schematic:

I have about 81 ac between plus vdc and ground, 163 v ac between plus vdc and minus vdc.

@studeb,

please look at the schematic, it is exactly as I explained it.

Thanks a lot,
Christoph
Click to expand...

That is very strange.... can you measure again with a different DMM ?

Maybe your DMM is plying tricks with you :confused:

Please check the rectifiers.

A picture of your setup would help enourmously :)
 
B

brozatus

Member
Joined 2006
Hello Rcruz,

I have no second dmm

First time I try to get some pictures in here
Topside
IMGP2930-11.jpg
[/url][/IMG]

Underside, next time I will do better
IMGP2938.JPG
[/url][/IMG]

DC on output
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DC across the resistor
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AC across the resistor
url]


AC on output
url]


Did some mistakes putting pics in, they are in my photo gallery.

Regards,
Christoph
 
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RCruz

RCruz

Member
Joined 2006
Paid Member
What are those yellow / black wires coming from the sides of the board ?

What is the AC voltage in the input ? (TX secondaries).

Please build a simple diode bridge, connect it to the TX and make the same measurements... (test the diodes continuity befor build just to be sure they are ok)

If the diodes are ok, and you still measure AC after the bridge... something is wrong with the DMM
 
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RCruz

RCruz

Member
Joined 2006
Paid Member
If AC input is 27Vac, there is no way you could get 80Vac after the rectifiers.... Something must be wrong with the DMM.

Try loading the output of the board with a 1000ohm and measure the voltage across... then lift one leg of the resistor and measure the current throu it with the dmm.
 
Bksabath

Bksabath

Banned
Joined 2007
brozatus said:
Hello Rcruz,

the yellow and blacks are the cables of the chokes.

AC input voltage is 27 v

Tomorrow i will try to build the diode bridge and do the measurements.

Thanks a lot for helping,
Christoph
Click to expand...

Just a couple of comments while You fault find on boards nothing major but Paradise is realy good and worth the effort

Can you draw/post SCH of your circuit.
I wuld reccomend you use 2 rectifiers board to suply Pardise
I posted a picture of my BETA PSU the top board uses the same telema common mode cokes
Can you etch your own boards as if you need I can post the PCB lay out as I am using it
Could you get better diodes?
I have posted picture of beta PSU

The AC there as shown by your multymeter is definetley wrong
 

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PMA

PMA

Member
Joined 2002
pmacura.cz/audiopage.html
Paid Member
RCruz said:
If AC input is 27Vac, there is no way you could get 80Vac after the rectifiers.... Something must be wrong with the DMM.

Try loading the output of the board with a 1000ohm and measure the voltage across... then lift one leg of the resistor and measure the current throu it with the dmm.
Click to expand...

There is ....

As you are saying, he has to load output of the power supply board. Plus Vdc vs. ground and Minus Vdc vs. ground with something like 1 kohm - 10 kohm. Without this load, the output capacitors with inductors in series may create resonant circuit and the DMM may either measure voltage on the overcharged capacitor or it is fooled by resonance. With output reasonably loaded, everything should be OK.
 
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