Still eagerly waiting.. Where to queue? nLOL

Eagerly Awaiting~~

another thing to point out.. Apparently after putting everything together, found out that the ground of all jacks are common (aka electrical connected) since all of them touches case. and so is the Earth connection. will the above post a Big Problem?

One of switch is the input, and another is for the output.. Its build to have 3 inputs and 3 outputs. my Soha is tied to 1 of the outputs. 1) I have tied the ground of each pair of Jacks together. so its a 3 wire config per pair, L signal/R signal/shared ground.

Have just 'completed' my Soha, its mounted in the same case with a switch setup. Having some problem: 1) When I turn up the volume, even not in the same channel to the Soha, I still can hear the music.. 2) My soha is not very quiet and crisp.. somehow muffled. any idea how to...

Fellow Head Fiers!! Finally troubleshoot the signal path.. and found the cause!! unexpectedly its the board.. theres no connection between the U2 opamp output to the Left channel R16 input.. (Shall post pic of the patch work later) Thanks to all the helpful Head-fier! especially dBel84 for...

Quote: Originally Posted by tomb It's possible the tube is bad. Can you see both heaters glow? There are two in a 12AU7 - both should appear as a small vertical rod that runs almost the length of the tube in the center of each set of plates. An EI 12AU7 will light up like a Christmas...

Anyone =o

Quote: Originally Posted by dBel84 Yes, you are right. The only colour coded resistors I use are the old ohmite little devils and they use a 3 bar code , yours obviously use the the 4 with the 5th being the tolerance, hence 1-5-0-0 ( the final brown indicating the number of zeros = 1 )...

It is Brown-green-black-brown-brown.. and both reads 1.5K on my DMM, weird but true =o As for the J113, checked a couple of common local brands.. most have the same GSD, shld be correct then.. =(

My B+ is 58.5V not far from the 60V mark, the 40V are far off.. and getting even further. Cos I'm using the J113 configuration, most bros in CONUS aren't, so not much examples to look at.. especially for the resistors.. thats y I attached a pix of it =X.. thanks for all the efforts.. any...

Just received a new tube, a GE5963.. but still no go!! Same as before, other then the 2 +40 points, the rest of the voltage is reasonable. the 2 +40 points shows a highest of around 30V.. no higher can it go. Whats the problem this time.. becos of the voltage, I dare not plug my headphones...

tried another opamp, still 1 channeled.. Hmm.. voltage still stucked at 36.5V ~

Quote: Originally Posted by FallenAngel Do you have another tube to test with? Jus ordered another tube, may take a couple of days for it to reach thou. very upset, but thanks alot guys =)

Quote: Originally Posted by dBel84 I agree with FA's thinking here - sound like something else is causing the problem , not the CCS. If all the voltages measure correctly at their point of operation ( ie for the tube - check the actual plate pins on the tube socket and the opamp pins...