Construire un compresseur UREI 1176 pour presque rien!

2.75 VAC c'est 2.75 mV ?

divisions d'affichage de mon oscillo

This step sets your meter tracking so if your compressor is compressing by say 10dB, you see -10dB on the meter.

Start by setting your shorting pin back to the “normal position” which connecting the two pins closest to Q13. Your meter will most likely drop. Set it back to zero by using the R71 zero adjust pot on the front panel. DO NOT touch the null adjust, it was set in the last step.

Set controls as follows.

Input = “24″ mid rotation
Output = “24″ mid rotation
Attack = full CW
Release = full CW
Compression ratio = 20:1
Meter mode = “GR”

- Apply a 1 KHz, 0dBu signal, confirmed with your DMM at pin 2 and 3 of the input XLR (0.775 VAC).
Move your DMM to pin 2 and 3 of the output XLR.
- Set output control for 0dBu (0.775 VAC) at the output.
- Set attack full CCW (off position) (déjà j'ai mis 3 heures avant de comprendre que mon Attack off n'était pas opérationnel donc je suis obligé d'appliquer la méthode mnats en ce qui concerne le short-circuit entre le pot 22 et le ground coté line amp). Set input control for +10dBu (2.44 VAC) at your output XLR.
- Turn the attack control ON (Fully CW) and readjust the output level control for “0dBu” if necessary.
- Now lets set the meter to display this 10dBu drop. (moi je n'observe aucun 'drop' le meter ne bouge pas à cette étape) When the attack is “off” (full CCW) and you see +10dBu at the output, set the meter to 0 by using the front panel zero adjust trimmer.
- When the attack control is “on” (full CW) and you see 0dBu at the output, use R44 to set the meter to -10.
-Repeat 6 & 7 until the output drops 10dBu whenever the attack control is turned ON. This can be a bit tricky. You’ll want to anticipate how one control will change the other.

Now lets set the meter to display this 10dBu drop. (moi je n'observe aucun 'drop' le meter ne bouge pas à cette étape)

When the attack is “off” (full CCW) and you see +10dBu at the output, set the meter to 0 by using the front panel zero adjust trimmer.

- When the attack control is “on” (full CW) and you see 0dBu at the output, use R44 to set the meter to -10.

-Repeat 6 & 7 until the output drops 10dBu whenever the attack control is turned ON. This can be a bit tricky.

5- Turn the attack control ON (Fully CW) and readjust the output level control for “0dBu” if necessary.

6- Now lets set the meter to display this 10dBu drop. When the attack is “off” (full CCW) and you see +10dBu at the output, set the meter to 0 by using the front panel zero adjust trimmer.

7- When the attack control is “on” (full CW) and you see 0dBu at the output, use R44 to set the meter to -10.