Techtalk

ok.

but what should i do now

no ihave no different tubes

is - 50 dbu good or worse ?

ok. then i need new tubes, which should i prefer?

great volker

maybe this is an idea?

i use jj ECC803 and 12bh7 from electroharmonix all brand new

..also did the grid stopper mod...nothing happens highvoltages for the tubes: v101: pin 1: 119 pin 6: 123 v102: pin1: 104 pin6: 230 v103: pin1: 94 pin6: 95 v104: pin5: 196 pin6: 76 i think they are in the normal range. :oops: DAMM the comp works sound good but the fucking hum peak 105hz @ -74db is t...

ok i found a 22k pot and assembled it. gain range is better now, but hum is still there.

now i measure the voltage of the tube pins

whats about with this "grid stopper" thing?

i read a lot in prodpro forum. should i try it?

http://www.prodigy-pro.com/forum/viewtopic.php?p=258781

cool volker, i order such pots.

tomorrow i will measure some voltages, maybe there is afault

thx...

but can i also use a 25k log pot? where should iconnect the 75kr resistor?

here u can see and listen to my hum

direct patch the output of one side in my motu hd192 converter

http://www.waldorfcave.com/humla2a.wav

7805 is isolated, i checked without heatsink... shielded wire for pots and xlr, output tranny has no shielded wire... i disconnected the ac heaters from other side and nothing happens rewireing of the ac heater not helped for info: hum is there also when nothing is connected to input later i will me...

hum is to loud, not normal

hum is constant not gain depended.

rewire my ac heaters and check in one minute

...change the retrifiers still hum

yes on both channels, exact the same

in the motherforum someone changed the rectifiers , and then his hum disapeares

ok...this thing is running and compressing. :lol: gain ratio have to be tuned like volker said (i use sowters) i do it later.... one problem is, that my unit hums a bit. more then it is ok for me :-( it comes not from the powertransformer, i can move it from side to side and nothing happens. maybe t...

hi joachim,

keine ahnung wo die kühlkörper her sind ...
hab ich vergessen