Soeren_DK

G9 HELP THREAD!
« on: November 07, 2005, 01:55:49 AM »
I thought we could make a big thread. Its easyer to find..

I got this problem with voltage in my g9.

I have replaced the to caps cause I had some hum with only 100u. Thought it could be that so I put some 220U caps and 4 0.6W 400ohm paralled over the + on the caps. But the hum was still there and louder.

This are the voltage Iam been reading....  :shock:  :shock:




Best regards
Soeren
Quote from: idylldon
...it works like a champ and is as quiet as a mouse pissing on a cotton ball.

http://www.soundcloud.com/doctorsclub


EZ81

G9 HELP THREAD!
« Reply #1 on: November 07, 2005, 05:12:32 AM »
Are the Zeners and the 1N4004 installed in the right direction?

Viitalahde

G9 HELP THREAD!
« Reply #2 on: November 07, 2005, 05:28:05 AM »
You have the resistors paralleled like what? The hum shouldn't get any louder.

Is your filtering done like this:

--->rect. AC--->220uF to gnd--->resistors---->220uF to gnd----->DC out

 :?:

Viitalahde

G9 HELP THREAD!
« Reply #3 on: November 07, 2005, 05:33:14 AM »
Hey, I think you don't have enough voltage before the regulator in the first place. 282v before and 280v after that 470ohm resistor?

Soeren_DK

G9 HELP THREAD!
« Reply #4 on: November 07, 2005, 08:53:57 AM »
Quote from: "V11TALAEHD3"
You have the resistors paralleled like what? The hum shouldn't get any louder.

Is your filtering done like this:

--->rect. AC--->220uF to gnd--->resistors---->220uF to gnd----->DC out

 :?:


No... Bummer. The resistor was placed direct over the to + connetores on the caps. I removed it.. Hmmm... Now I am reading 300V on C14 and 241V on C15... And there is still humm...  :shock:
Quote from: idylldon
...it works like a champ and is as quiet as a mouse pissing on a cotton ball.

http://www.soundcloud.com/doctorsclub

Soeren_DK

G9 HELP THREAD!
« Reply #5 on: November 09, 2005, 07:52:12 AM »
Could it be some bad diodes???
Quote from: idylldon
...it works like a champ and is as quiet as a mouse pissing on a cotton ball.

http://www.soundcloud.com/doctorsclub


 

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