Doepfer

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

> 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

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
>

--- In Doepfer_a100@yahoogroups.com, "Stu Grimshaw" <grimshaw@...> >
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 ?
> 

Capacitors actually work the opposite to resistors. Two equal value
capacitors in parallel will have double the value, two equal
capacitors in series will have half.

Cheers,
Adam-V

> 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 ?

No it's the opposite. Two equal capacitors in parallel double the capacity
and consequently even double the period (or half the frequency)

> 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 ?

We never had problems with Conrad though we order only very little from
them. And with capacitors there should occur no problems. If you need only a
few capacitors you can get them for free from us if we add it to another
module order (or if you send an envelope with stamps). Capacitors are cheap
(about 0.10 to 0.50 Euro only depending on the value) and the shipping
charges are probably more than the capacitors.

Best wishes
Dieter Doepfer

hi dieter,

apropos small components: can i order a quantity of jack sockets from your firm ? the 
ones i get from conrad are okay on the quality side, but the thread is too short to be 
usable with holes drilled into the... er... blindplatten (sorry, english guy loses his mother 
tongue). 

the holes were drilled and i intended to build a couple of passive modules and do a little 
modest circuit bending, but when people say "ooh, that looks interesting, what does it do 
?" i have to bow my head in shame and mutter "nothing yet".

stu

--- In Doepfer_a100@yahoogroups.com, <hardware@...> wrote:

>
> > 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 ?
> 
> No it's the opposite. Two equal capacitors in parallel double the capacity
> and consequently even double the period (or half the frequency)
> 
> > 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 ?
> 
> We never had problems with Conrad though we order only very little from
> them. And with capacitors there should occur no problems. If you need only a
> few capacitors you can get them for free from us if we add it to another
> module order (or if you send an envelope with stamps). Capacitors are cheap
> (about 0.10 to 0.50 Euro only depending on the value) and the shipping
> charges are probably more than the capacitors.
> 
> Best wishes
> Dieter Doepfer
>

--- In Doepfer_a100@yahoogroups.com, <hardware@...> wrote:
>
> > hi dieter,
> >
> > apropos small components: can i order a quantity of jack sockets
> > from your firm ? the
> > ones i get from conrad are okay on the quality side, but the
> > thread is too short to be
> > usable with holes drilled into the... er... blindplatten (sorry,
> > english guy loses his mother
> > tongue).
> >
> > the holes were drilled and i intended to build a couple of
> > passive modules and do a little
> > modest circuit bending, but when people say "ooh, that looks
> > interesting, what does it do
> > ?" i have to bow my head in shame and mutter "nothing yet".
> >
> > stu
> 
> You can get the sockets as spare parts but have to order from the
> representative in your country. I don't know your home country.
> 
> Dieter
>
sorry. i'm in germany.

stu

Segor in Berlin stocks them:
http://cgi.segor.de/user-cgi-bin/sidestep2.pl?foto=1&Q=cliff&M=1

--- In Doepfer_a100@yahoogroups.com, "Stu Grimshaw" <grimshaw@...> wrote:

>
> --- In Doepfer_a100@yahoogroups.com, <hardware@> wrote:
> >
> > > hi dieter,
> > >
> > > apropos small components: can i order a quantity of jack sockets
> > > from your firm ? the
> > > ones i get from conrad are okay on the quality side, but the
> > > thread is too short to be
> > > usable with holes drilled into the... er... blindplatten (sorry,
> > > english guy loses his mother
> > > tongue).
> > >
> > > the holes were drilled and i intended to build a couple of
> > > passive modules and do a little
> > > modest circuit bending, but when people say "ooh, that looks
> > > interesting, what does it do
> > > ?" i have to bow my head in shame and mutter "nothing yet".
> > >
> > > stu
> > 
> > You can get the sockets as spare parts but have to order from the
> > representative in your country. I don't know your home country.
> > 
> > Dieter
> >
> sorry. i'm in germany.
> 
> stu
>

> hi dieter,
>
> apropos small components: can i order a quantity of jack sockets
> from your firm ? the
> ones i get from conrad are okay on the quality side, but the
> thread is too short to be
> usable with holes drilled into the... er... blindplatten (sorry,
> english guy loses his mother
> tongue).
>
> the holes were drilled and i intended to build a couple of
> passive modules and do a little
> modest circuit bending, but when people say "ooh, that looks
> interesting, what does it do
> ?" i have to bow my head in shame and mutter "nothing yet".
>
> stu

You can get the sockets as spare parts but have to order from the
representative in your country. I don't know your home country.

Dieter

> > You can get the sockets as spare parts but have to order from the
> > representative in your country. I don't know your home country.
> >
> > Dieter
> >
> sorry. i'm in germany.
>
> stu

So you simply order from us directly. Details in the pricelist
www.doepfer.com > Prices > Spare parts
Dieter