Techtalk

Hi Volker, thx for your answer.
The Neon lamp is shining, does this mean it works normally?
I'm gonna see if I have a spare neon lamp in my stock and replace it.

I just noticed something else:
when I power up my unit with the meter in GR mode, le left channel vu meter indicates a "negative" gain reduction (+3 dB) for about 15 seconds and then it goes back to 0... the right channel (the one that is working perfectly) stays to 0 when i power up the unit.

Does ...

i just disconnected both "stereo links"
now i have peak reduction on channel right!

the left channel is still not compressing though. and it has a little hum (right channel is hum-free)

i tried what volker said about RV 103 & 203, but there is no difference.
I'll try to find mistakes in my build ...

The bypass is fine, i measured it and i can hear it too because de "gain" control works fine on both channels.
I also checked the "link" molex's as i was not sure how to wire it.

Now i am checking all the gain reduction stage looking for mistakes on my build...

it happens on both channels so i didn't try to swap both T4B's. I tried to run the unit without T4B's and the same thing happens (obviously!).
I'll double check my PCB.
thx for your answer ;)

Hi,

I am a new member on this forum and i've been making diy audio stuff for4 years.
I've started to build a d-LA2A with volker's board and i'm almost finished.
My unit is wired and I made some tests last week, everything works fine except there is no peak reduction at all.

I'm wondering if my ...