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...

Jus checked the pot connection again.. shld be right =X frustrating.. still playing 1 channeled.

Alps RH27 50Kohm should have the same pin configuration I tink.. I checked it with the DMM =x

Quote: Originally Posted by FallenAngel What does -12V show? I'm trying to get at correct transformer wiring. If you hooked it up 15-15-0 vs 15-0-15 you might see this. Oh, and I'm hoping -12.6V part shows -12.5 to ground, not positive, right Another thing, can you double check...

Sorry guys for the late reply, here are wat I tried getting from ur replies. thanks Quote: Originally Posted by dBel84 15-0-15 12VA gives 400mA to play with which should be suitable for the basic SOHA. Nothing strikes me on the images except that I am curious how high you can adjust...

Hi guys, some voltage problem seeking advice.. The attached picture shows my voltage reading.. apparently 1 of the +40V point is wrong. I followed mb3k list and instructions.. I'm using the J113 Jfet configuration (no LND150 in Singapore) JRC4560 for opamp, 12VA 15V transformer and a RH27...

maybe the weight is the matter? Own MS2i n had MS1 for a period of time.

Tempting.. I have a MS2i, and I have problem coping with the weight till now.. will it be too much of a downgrade to this? am interested to know where is a place to get them?

Guess so =P DIY is fun, U can make what U want.. but over here ain't the best place to get supplies.. anyway, for your future DIYs.. this is a nice aussie site to get supplies =) http://www.diyaudiostore.com/wire/wire.htm anyway, its darn late.. goin to bed. nights Quote...

Capunk those are thick copper braids U have there.. looks like speaker cables.. 20gauge copper each?

Quote: Originally Posted by 450 Not trying to be rude or anything, but in this case wouldn't a $20 AV-710 be better? Is the Audigy 4 bit perfect? Was thinking the same thing, since he is going to use a external DAC anyway. but since he has already gotten the Audigy4....