Paradise Builders

[miepa]

thanks Frans. hope you would say so.
FP was my first choice.

[RCruz]

Originally Posted by RCruz

Did you check your caps voltage rating ?

Originally Posted by Libby123

no, as I would saying. I pulled out the plug as I saw the "liquid".

What is the voltage rating of the caps that blew ?

What caps are you using ? (Capacity uF Voltage rating V) it is written in the caps body.

You stated you used different caps because of the footpint...

[Libby123]

Originally Posted by RCruz

What is the voltage rating of the caps that blew ?

What caps are you using ? (Capacity uF Voltage rating V) it is written in the caps body.

You stated you used different caps because of the footpint...

I thougth it were the 6800 from GB that have the worng foot spacing, but it was the 4700 Caps that were wrong. So the "wet-ies" are the ones from GB = 6800/6,3V

[RCruz]

We need some voltage measurements.

I would visualy check all parts, remove the caps, power on and measure voltages on the empty locations of those caps.

[quan]

Originally Posted by hesener

yes exactly

Hi Alfred, change input loading to 22K and no changes in servo offset ie +5V so look like i will leave it at that. I will try to find the appropriate material for the faraday cages and re-do the groundings. Thank you so much. BTW is the picture in the build guide is your R3 ? How do you implement input loading switch if you don't mind me asking?
Quan

[Libby123]

Originally Posted by RCruz

We need some voltage measurements.

I would visualy check all parts, remove the caps, power on and measure voltages on the empty locations of those caps.

So, I take some measurements:

First of all the power supply is +24,96V and -25,09V. OK or Not OK?

The board with the 2x 6800/10V at V+ broken
VCASCH: 14,4V
VCASCL: -14,4V
V+: +18,00V (trimmed)
V-: -18,00V (trimmed)
V- 4700uF -14,4V
V- 6800uF -5,6V
V+ 4700uF +14,4
V+ 6800uF -4V !!!!!!!!!!!!!!

I think thats it. But why?

[FdW]

Originally Posted by Libby123

First of all the power supply is +24,96V and -25,09V. OK or Not OK?

Totaly o.k.!

[FdW]

Originally Posted by Libby123

V+: +18,00V (trimmed)
V-: -18,00V (trimmed)

O.k. to 4 decimals

[hesener]

Originally Posted by quan

Hi Alfred, change input loading to 22K and no changes in servo offset ie +5V so look like i will leave it at that. I will try to find the appropriate material for the faraday cages and re-do the groundings. Thank you so much. BTW is the picture in the build guide is your R3 ? How do you implement input loading switch if you don't mind me asking?
Quan

Hi quan,
thanks for the update, thats ok then. Yes that is my R2 build, working as advertised (in fact I had a great evening yesterday, listening to the Cowboy Junkies).
The input resistances in my case are Dale RN65 resistors (stepped 10 / 50 / 100 / 220 / 470 / 1000 Ohm) through a rotaty switch (C&K, with silver contacts). works just fine.....

[quan]

Originally Posted by hesener

Hi quan,
thanks for the update, thats ok then. Yes that is my R2 build, working as advertised (in fact I had a great evening yesterday, listening to the Cowboy Junkies).
The input resistances in my case are Dale RN65 resistors (stepped 10 / 50 / 100 / 220 / 470 / 1000 Ohm) through a rotaty switch (C&K, with silver contacts). works just fine.....

Thanks Alfred, can you post a picture how it is implemented if it is not too much trouble?
Quan