Yahoo Groups archive

Doepfer

Index last updated: 2026-04-29 00:15 UTC

Message

Re: Changing the LFO speeds/crossover points (lo,med,hi)

2007-05-22 by Stu Grimshaw

okay, that's what i was hoping to hear. thanks for taking the time to answer my question 
dieter.

given that adding a capacitor is easier than removing one - never did get the hang of 
those solder suckers - do two equal capacitors in parallel produce half the capacitance, 
like resistances ?

and another question to the group generally (in case someone's still reading): can anyone 
recommend a good supplier of reliable electronic parts in germany ? there's a conrad 
round the corner, but i've been dissatisfied with so much that i've bought there. this 
should be a new post n'est-ce pas ?

thanks for the help,

stu




--- In Doepfer_a100@yahoogroups.com, "ddoepfer" <hardware@...> wrote:
>
> > hi people, and in this case, especiallly dieter,
> > 
> > i received a few days ago an a-146 LFO 2, and i'm a little
> frustrated at the point at which i 
> > need to switch from one range to the next. bang in the middle of the
> range of what i 
> > would use to produce "normal" expressive effects, i need to flip the
> switch and twiddle the 
> > knob :)
> > the first half of the medium range is not something i would use as
> an expressive device, 
> > ditto for the upper half of the hi range (i'm naturally not
> suggesting that there are no uses 
> > for these speeds).
> > 
> > so my question is: is there a way to either a) change the crossover
> points or b) get all three 
> > ranges to start at zero and cover the range up to their respective
> maxima ?
> > 
> > cheers,
> > 
> > stu
> 
> Sorry for my late reply but I was not in the office last week and had
> problems with the Yahoo messages (probably because of the installed
> autoresponder) and did not receive some messages.
> 
> There are three capacitors on the A-146 pc board. C1 (680pF high
> range), C2 (100nF mid range) and C3+C4 (both 2.2u, low range). If the
> value of a capacitor is increased the corresponding frequency range
> becomes lower and vice versa. If you e.g. double C1 to 1nF the high
> frequency range goes down about 1 octave (i.e. the period time
> doubles). The capacitors are just behind the frequency control and
> marked clearly C1, C2, C3 and C4.
> 
> Best wishes
> Dieter Doepfer
>

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.