you may want to read the description of the module, everything you state
seems normal for 188 modules, that's how they were designed:

from: http://www.doepfer.de/A1882.htm

The A-188-2 uses the same high speed VCO (HSVCO) for the BBD clock as the
A-188-1. The clock and consequently the delay time can be controlled
manually (delay control) and by the two control voltage inputs CV1 and CV2.
The sensitivity of CV1 is approximately 1V/oct. CV2 is equipped with a
polarizer (the new type of potentiometers with center detent too). The HSVCO
has a clock output available that is normalled to the clock input socket.
These sockets can be used to link different BBD modules and to run them with
the same clock. But even other applications with frequency dividers (e.g.
A-163) or PLL (e.g. A-196) are conceivable. A voltage composed of the manual
delay control, CV1 and CV2 is available at the CV out socket, e.g. to
control an external clock suppression filter as the A-188-2 is not equipped
with such a filter (same as for the A-188-1).

Important note (especially for A-188-1 users): The A-188-1 uses single BBD
circuits, which can be adjusted to minimize the clock noise as the outputs
of the used BBD circuits are symmetrical (for details please refer to
A1881_adjustment.pdf, trimming potentiometer P10). By way of contrast the
BBD circuit used in the A-188-2 (MN3011) has six asymmetrical outputs that
cannot be adjusted to minimize the clock noise. In addition the clock noise
of the six outputs adds up. From there the clock noise of the A-188-2 is
more intense than of the A-188-1. This is caused by the properties of the
MN3011 but not a mistake of the module ! If you feel that the clock noise is
too much you have the right to return the unused module within 14 days (i.e.
the module has no scratches or prints, e.g. from srewing into the frame).

On 5/5/07 12:51 PM, "patate_le_mage" < patate.pat@... > wrote:

> Hello everybody,
> my english is not very good but i try to explain my problems.
> when i use the A-188-2, if i try to use the delay knob in his first
> half, all the output give a high frequency ( depend on the delay )
> sound and i can't suppress it without going thru a LP-VCF wich
> drastically modify my sound, A notch filter does'nt supress it because
> it's not a sinus sound. Is this sound the clock sound wich is describe
> in the module's presentation
> My second problem is when i try to use the clock in : what kind of
> signal have i to put in, is it only to chain BBD modules
> Third, i haven't really understood the use of the CV out on this
> module : what exactly is going out.
> thanks for your answer.
>
> Patrick Maurel