Yes pavel, it brings dust, but it is only for in case that.
I have no problems with cooling. Reasons to mount the fan: I had the little fan in stock and i had some time to mount it.
So i do not think the fan will work ever.
I have no problems with cooling. Reasons to mount the fan: I had the little fan in stock and i had some time to mount it.
So i do not think the fan will work ever.
Ok. Third Amp finished with same results: relays close but no sound->input problem.
What do I do wrong?
1. Is a regular cd player output is ok as input?
2. + is connected in the first pin second row. - is connected to the first pin first row (groud).
3. A jumper is inserted to shortcut the - and ground.
4. Output is connected to the wago connectors related to the same input (jp5 pins 1,2).
Any help?
What do I do wrong?
1. Is a regular cd player output is ok as input?
2. + is connected in the first pin second row. - is connected to the first pin first row (groud).
3. A jumper is inserted to shortcut the - and ground.
4. Output is connected to the wago connectors related to the same input (jp5 pins 1,2).
Any help?
I took out the omron relay and put jp4 jumper.
I connected a balanced input (active xover) and now I could hear a loud noise, which is caused of the amp groud not connected to the house ground, but still no sound.
I connected a balanced input (active xover) and now I could hear a loud noise, which is caused of the amp groud not connected to the house ground, but still no sound.
peranders said:
Both, yes.
Upupa Epops said:
correction: -11.5V.
I use 18Vac toroid.
The tp1,tp2 voltage is 23.9V.
Op amps are opa134pa (TI).
At TP1,2 you must have +/- 12 V DC ! If not, something is wrong ! Are you sure, that voltage regulators are at correct position ? Read again setup instructions !
Another thing: The other channel's opamp is getting very hot and there is a white noise on the outside, but if I thouch its input it doesn't affect anything (not like the right/lower) input.
-> I replaced its opamp and it's like the other input now.
-> I replaced its opamp and it's like the other input now.
At outputs of opamps, you must have DC voltage near zero ( +/- a few milivolts ). Which is this value ?
So all is OK, problem is probably only in input connection... Which DC voltage are at TP 3 and 4 ?
Look at photo in the middle at P-A page and make jumpers the same. If touch + pin beside left or right jumper by finger, you must hear hum from speakers...