[alexc]

Hang in there ..it does happen ..  re   'roadbloacks'   along the way.

Keep going thru the schemo and your build  ..  make sure things are mostly OK and go from there.

The result is well worth the travel.

Good luck with it ...

[andow]

Sorry if this is obvious, but how do you calculate the current through the Zener diode replacing the neon bulb in the meter circuit? 

[dbonin]

Sorry if this is obvious, but how do you calculate the current through the Zener diode replacing the neon bulb in the meter circuit? 

https://groupdiy.com/index.php?topic=3278.2440


its all there... I asked the same question awhile back! 

[andow]

https://groupdiy.com/index.php?topic=3278.2440


its all there... I asked the same question awhile back! 

Thanks! I don't know how I missed that....

[andow]

I guess it's just semantics, but in the manual by Universal Audio it says about the side-chain pre-emphasis:

This potentiometer is factory set for a “flat” side-chain response (clockwise). Increasing
the resistance of this potentiometer by turning it counter clockwise will result in
compression which is increasingly more sensitive to the higher frequencies.

Looking at the schematics however, the response for high frequencies stays the same and compression gets less sensitive to lower frequencies.

Am I reading the schematics correct?

[dmp]

Yes,  the pot in parallel with the cap make a HPF.
It does make the compression more sensitive to high frequencies, as the low frequencies are filtered out.
To maintain the same amount of compression as the pot is turned up, the peak reduction would have to be turned up.

[andow]

Yes,  the pot in parallel with the cap make a HPF.
It does make the compression more sensitive to high frequencies, as the low frequencies are filtered out.
To maintain the same amount of compression as the pot is turned up, the peak reduction would have to be turned up.

Thanks for the confirmation! 

From small things big things come!

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