Hey, I just realised that the line out of my daw interface was at -30dbfs, I've set it up at -18dbfs which corresponds to 0dbu right ? and now I easily get 5db of GR turning the PR knob at something between 20 and 30. So you're right, my input was too low, but now my gain pot is at about 10 no more, to get 0db on vu meter, but I guess it's normal. Alpha pots. I think I'm gonna do the 25K pot / 75k resistor mod.Without a reference 0dB says nothing. Your VU Meter should read 0VU with +4 dBu at the output of the D-LA2A.
If you feed your D-LA2A with +4 dBu 1 kHz signal, and you have to set your gain (RV101) higher than a few degrees to get +4 dBu at the output, your input is probably too low.
What is your input transformers ratio?
Maybe it is wired backwards (4:1 instead of 1:4)?
Is this chasis you're using a 3U? If so, where did you get it if you don't mind me asking?Ok, I found out. It works like a charm ! The 25K pots mod is must have IMO. By the way, I replaced the R37 limiter response trimmers by 2 clarostat and put them on the front to have more flexibility. Also removed the 5V regulator from the PCB and put it on chassis with bigger Heatsink.
In GR mode with no signal present the - lead of the meter has 25VDC and the + side had about 5VDC. I can see VAC coming appropriately from the output trafo to the switch and to the + side of the meter.Hey there, did a handwired build into the Don Audio chassis and have been loving it.
Meter had failed... got a new one and works great. They are goddam expensive though.In GR mode with no signal present the - lead of the meter has 25VDC and the + side had about 5VDC. I can see VAC coming appropriately from the output trafo to the switch and to the + side of the meter.
Feels like the meter failed. Any ideas on if these are repairable, or what would fail? What would cause this failure?
what are you basing this info on?Hi everyone. Just ordered the pcb and I since i have a local transformer manufacturer I trust, I would like to know please, what are the appropriate primaries for EU (has it got to be 2 x 230V ac??? Why not 1x 230V ac larger one?) and secondaries measurements (voltage -Vac- and power rating- VA) of the appropriate torroidal power transformer?