Ok,Time is running when concentrated on electronics... almost 20h and I must get back to my family life...
Ok I'll put 6,8KΩ in place of 27KΩ tomorrow...
Thanks a lot for all your support Micoals, I will be back 'morrow
so far everything looks good
SE Electronics Z3300a
- Thread starter TornadoTed
- Start date
Help Support GroupDIY Audio Forum:
so far everything looks good
put over R13 a 6.8k in paralel or maybe 1,5...3,3k.
I replace R13 with 6,8KΩ ? or I put 6,8KΩ in // with R13 (27KΩ) ?
I will measure the VR value tomorrow but I think it's very very low since I could not get upper voltage...
put 1,5....6,8KΩ in // with R13 (27KΩ)
A difference of 1v at Upolariz=60v means 1.6% tolerance.
Not even a sound engineer can hear the difference
Not even a sound engineer can hear the difference
let's go "in the middle" with 2,7KΩA difference of 1v at Upolariz=60v means 1.6% tolerance.
No sound engineer can hear that.
the final value R=R13+R14 will be distributed between R13 and R14 because together with capacitors they form anti HF filters,let's go "in the middle" with 2,7KΩ
but only after adjusting the voltage after R5.
Ok... I don't know if you have the polar board schematic...
Anyway have a cool evening
Unfortunately, I did not draw the diagram, in general I make mods even without diagrams.Ok... I don't know if you have the polar board schematic...
Anyway have a cool evening
Have a nice evening!
Replaces the extra 12v Zenner with the previous 9.1v one.
From R13/VR adjust Upolariz to +/- 61v if possible.
Measure the voltage before and after R5.
From R13/VR adjust Upolariz to +/- 61v if possible.
Measure the voltage before and after R5.
in series with zeners D1 and D2 instead of the 12v zenner
what do I do with the VR on R13 which is full CCW ?
This
In Presonus
With zenner 9,1v can you get Upolariz +/- 61v ?
R3 and R4 are now 6.8k matched pair?
nop ! R3 R4 have been reput at the original values since I rebuilt the card > 2,2KΩ
Ok, in Presonus
With zenner 9,1v can you get Upolariz +/- 60,5....61v ?
wait... I'm on it
