[jtvrdy]

you are right only just touching a little the input pot the crostalk change… maybe I can replace the pot with a rotary switch and resistors

[jtvrdy]

I understand that a little of crosstalk is normal, the other day I was compressing bass in one channel but also feeding a kick on the other channel to make the bass pumping it sounds great but discovered that the kick is leaking into the bass (only 10-12dB lower)

could you indicate which resistors to look and check if they are correct?

thanks.

[jtvrdy]

Sorry but dont received…

[jtvrdy]

could you show me what component modify in order to change the filter, variable would be nice,any schematics?

thanks.

[jtvrdy]

ok thanks Ted, I will send the unit to you, shipping address?

I checked another unit and it has de same noise/hum problem..also some resistors have different values.

if you found an easy solution let me know so I can replicate it on this second unit.

thanks,

http://www.vaporstudio.com/studio/joemeek_pcb03.jpg" />

[jtvrdy]

looking at the output stage,

the A&B resistances are 10k but the C&D are 20K, should not be of the same value?

also the pins 2&5 goes through A&B to ground but the pins 10&13 goes to C&D but not to ground,shoould be connected to ground as A&B?

http://www.vaporstudio.com/studio/joemeek_pcb01.jpg" />

http://www.vaporstudio.com/studio/joemeek_pcb02.jpg" />

[jtvrdy]

checked the input ICs and it is the pin 5 that is connected to ground, linked both pins but no changes…

the noise buzz not follow the input gain pot, if gain increased only white noise goes up the buzz stays at same level, but with the gain output pot it increase/decreases.

[jtvrdy]

first of all thanks for your patience and time.

well, I made a test , on inputs a 600ohm resistance on pins 2&3 and outputs direct to computer,no ground loops,tested with different cables and always same result

http://www.vaporstudio.com/studio/joemeek1.jpg" />

if it would be a power supply, it would be on booth channels no?

[jtvrdy]

I have a low level hum on the rigth output only, any idea where to look ?

[jtvrdy]

the chassis is grounded to mains ground.

the potentiometer shields on the front panel sholud be connected to the chassis ? now the green paint is insulating the connection between them

[jtvrdy]

maybe I take a wrong reference point,

If referenced to the center pin of the 7815 regulator I get +15.4 and -16.7 , but if I take as a reference the audio ground a get +16 and -16.1, is this correct?

also, the chasis ground is connected to audio ground only through the locking screw in the xlr connector?

With the unit opened , measured 64v AC between the chassis ground and audio ground….

[jtvrdy]

I could not find any with a 680ohm between pin 1&2 ,perhaps it is between 6 and 7 ?

[jtvrdy]

the IC7 is near the vu meter trim adjust? or in front of the release potentiometer?

[Author]

Posts