It has been a long time since the last post in this thread.
First, I would like to thank Annalogguru and Dirk Hendrick for their precious information about this SDD3000 preamp.
I finally build my own clone, based on the Veroboard layout provided in this thread.
I have build the 9V version.
The pedal sounds great , but as I am curious I would have some more question for the "specialists" after reading some documentation.
Indeed, the pedals boosts a lot the signal, and I can barely not used setting above 9 o'clock on the level knob . I have discussed with some friends, and it seems to be normal
I use my pedal with the following FX chain
Guitar - HD500 input - Fxloop send - Sdd-3000 - Actone (clone Tech21 liverpool) - FXreturn - HD500 out to monitors or amp.
Of course, I aim to simulate the sound of U2/The edge
First, the preamp schema is very close to original SDD-3000, and we don't have the attenuators. Reading the Owner's manual, the clone pedal should see an "instrument level", with input attenuators at about -10/-30db .
http://www.proun.net/blog/sdd3000_owners_manual.pdf
Is it the case with the clone pedal , or are we in the "+0db/ pretty hot signal" situation ?? (which may explain why we can not go above 9'o'clock without clipping)
Second, I output the SDD3000 into a clone of Tech21 liverpool pedal.
The manual says, that the input should be close to that of a standard electric guitar, -10dbm-250mv.
Once again , as we have no attenuators, what is the situation regarding the output signal of the SDD3000 clone pedal ??
Third, as my SDD3000 and liverpool clone are into my HD500 loop.
HD500 loop have a switch to feed line/stomp level. I suppose I should use stomp position, but what do you think about that ??
Then, The HD500 has the possibility to reduce the send level, and raise the return level of the FXloop, by means of Line 6 Edit.
What would be then your recommandations ?? May I use this feature to simulate the input/output attenuators in some extend??
http://www.tech21nyc.com/support/manual ... ies-OM.pdf
Last but not least, when I see the block diagram of SDD3000, it seems that the first half of the IC1 is "seen" just in case of -30db input attenuator.
Do I understand well or not ??? (I am not at all a "boss" in electronic"
).
As the shema of the SDD3000 clone includes this IC1, what happen if we doesn't have the -30db switch possibility. Is the signal too "hot" because of that ??
(I just would like to understand better)
Hoping you could provide me with some precious information,
Cheers
).
.... that works!
