Simple DiodeBridge Compressor
- Thread starter richiyobs
- Start date
Help Support GroupDIY Audio Forum:
The depends at what level you need your lowest threshold to be. I think the best solution would be not to connect the 100k resistors to ground but to a small positive voltage. For example put 10k resistor and schottky diode from +15V to ground and this will give you a 0.2V - 0.4V voltage where to connect the 100k resistors.
That transformer has pretty terrible frequency response. I have used similar transformer in a fuzz/octaver pedal where limited frequency response is actually wanted.
www.acsoundstudio.com/DIY/midsidepassive.gif
I d like to have a look at this schematic
But missing link
I d like to have a look at this schematic
But missing link
tryed Ms circuit to sum 2 ch into SC...
the sum point, sc input, out vs SC input
just to compare and verify phase shifting
on Nyquist plot i now see same figure but offset in gain as should be
hoping in this way to affect compression as is working in a stereo behavior
so to reduce the energy created by the sum
1- not so expert to judge
2- not sure the Ms is right
thanks for your attention
best
richi
the sum point, sc input, out vs SC input
just to compare and verify phase shifting
on Nyquist plot i now see same figure but offset in gain as should be
hoping in this way to affect compression as is working in a stereo behavior
so to reduce the energy created by the sum
1- not so expert to judge
2- not sure the Ms is right
thanks for your attention
best
richi
Attachments
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Schematic with all adviced updates
hope everything s fine....
omitted bypass switch, and 2x6 Lorlin for HPF.... directly wired to front panel
for the blend part i m splitting only the positive pole of the signal, for the moment....i ll add a proper line driver when a i get time
best
richi
hope everything s fine....
omitted bypass switch, and 2x6 Lorlin for HPF.... directly wired to front panel
for the blend part i m splitting only the positive pole of the signal, for the moment....i ll add a proper line driver when a i get time
best
richi
into AML52F50 they re using 4148 too for diode bridge
Audio Maintenance Limited AML-17-048 - 52F50 Full Kit - (500 series Compressor)
i believe is the remake of the old 2264/54
Audio Maintenance Limited AML-17-048 - 52F50 Full Kit - (500 series Compressor)
i believe is the remake of the old 2264/54
That's real DIY.
R48 in the signal path... Is 3k3
The side-chain i divided into 2 boards
The first one for opa buffer, hpf and detector, the 2one the controls....
This way you can add a second buffered detector for stereo version, for different tracking mode
The switch sw1 in the side chain can be not wired if you build a stereo unit with one control board
Sw2 and 3 are a double pole switch….. it s autorelease, here I did an error!
Forgot to wire sw3 to ground when not engaged in the pcb , so just wire from switch to ground since the footprint in the pcb is not wired ( the squared one ), and the other 2 have to be reverse wired
For calibration I did this:
Sidechain trim totally Cw
Set meter trim to have needle to zero
Now turn ccw the SC trim till needle goes down... Now set it again to zero rotating cw the same trim
Measuring Cv out i get 0.5mV
hope everythign is fine
Next step i ll try 8 diode as Heikki did in his unit
Best
Richi
The side-chain i divided into 2 boards
The first one for opa buffer, hpf and detector, the 2one the controls....
This way you can add a second buffered detector for stereo version, for different tracking mode
The switch sw1 in the side chain can be not wired if you build a stereo unit with one control board
Sw2 and 3 are a double pole switch….. it s autorelease, here I did an error!
Forgot to wire sw3 to ground when not engaged in the pcb , so just wire from switch to ground since the footprint in the pcb is not wired ( the squared one ), and the other 2 have to be reverse wired
For calibration I did this:
Sidechain trim totally Cw
Set meter trim to have needle to zero
Now turn ccw the SC trim till needle goes down... Now set it again to zero rotating cw the same trim
Measuring Cv out i get 0.5mV
hope everythign is fine
Next step i ll try 8 diode as Heikki did in his unit
Best
Richi
Sidechian pcb has another error...
100uF in the timing net must be reversed.... When I did Gerber I was using a np cap in kikad! But the schematics were well updated
So the print is wrong for that component... Sorry!
Best
Richi
100uF in the timing net must be reversed.... When I did Gerber I was using a np cap in kikad! But the schematics were well updated
So the print is wrong for that component... Sorry!
Best
Richi
