spiftacu1ar
Head-Fier
- Joined
- Aug 7, 2007
- Posts
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Hello,
I just finished building my ck2III. I did the initial setup as per the directions, getting the final voltage through r23 and r43 to be about 14.2mv. (and I have the outputs heatsinked). I also have a ground loop breaker consisting of a resistor and capacitor as recommended.
However, there are two problems when I power it on for use. Firstly, its extremely loud: at minimum volume, its at about listening volume, (I am running hd650's on the output, and the gamma2 on the input). Secondly, it buzzes a lot. If I remove the cable from the input, the buzzing goes away, but if I have the cable connected, and not connected to the gamma2 (so open on one end), the buzzing is still there. Also, if I remove the cable, and crank the volume up, the buzzing can still be heard.
The ONLY thing I did that is not in the directions is that I have a 3.5mm jack wired in parallel with the rca jacks, which means the left and right ground are shorted together (could this cause it?). I checked the resistance between the chassis and the signal ground, and it is about 25k ohms, I am not sure if this is normal, but it doesn't seem like its a short. Also, if this counts as a difference, I am using a 27k ohm resistor in front of the led, and a low current, low voltage led that is very dim (I don't like bright led's on the panel)
Thanks for any help. It's most appreciated.
I just finished building my ck2III. I did the initial setup as per the directions, getting the final voltage through r23 and r43 to be about 14.2mv. (and I have the outputs heatsinked). I also have a ground loop breaker consisting of a resistor and capacitor as recommended.
However, there are two problems when I power it on for use. Firstly, its extremely loud: at minimum volume, its at about listening volume, (I am running hd650's on the output, and the gamma2 on the input). Secondly, it buzzes a lot. If I remove the cable from the input, the buzzing goes away, but if I have the cable connected, and not connected to the gamma2 (so open on one end), the buzzing is still there. Also, if I remove the cable, and crank the volume up, the buzzing can still be heard.
The ONLY thing I did that is not in the directions is that I have a 3.5mm jack wired in parallel with the rca jacks, which means the left and right ground are shorted together (could this cause it?). I checked the resistance between the chassis and the signal ground, and it is about 25k ohms, I am not sure if this is normal, but it doesn't seem like its a short. Also, if this counts as a difference, I am using a 27k ohm resistor in front of the led, and a low current, low voltage led that is very dim (I don't like bright led's on the panel)
Thanks for any help. It's most appreciated.
following all those parallel lines in the wiring diagram confused me when I was working late at night.