Doepfer

>
>
> hi ladies (hopefully there's 1 or 2) and gentlemen-
> i was talking to shawn at analogue haven, who recommended against my
> putting a spring reverb in a suitcase.  i wondered if anyone tried
> this using the new PSU, which supposedly causes less noise due to ring
> core transformer?
> also, i'm curious if anyone has attempted to sheild the reverb unit?
> perhaps covering it in tin foil, and attaching a ground from the
> transformer or bus board to the foil?
> i could drill holes of course, but i'd like to have the tank nice and
> snug in the case so i don't have to futz with it when traveling.
>
> thx-
> tom
>
>
>

On Tue, 29 Mar 2005 13:09:01 +0200, Dieter Doepfer <hardware@doepfer.de> wrote:
> 
> > also, i'm curious if anyone has attempted to sheild the reverb unit?
> > perhaps covering it in tin foil, and attaching a ground from the
> > transformer or bus board to the foil?
> 
> We have built a shield (before the PSUII) made of 1 mm steel that covered
> the spring system completely but it did not help very much. The problem is
> the magnetic shielding not the electrical shielding. A simple foil will not
> help from our experience. The only material I know that can be used for
> magnetic shielding is u-metal (the greek u). I don't know if the same term
> is used in English language. But this material is very expensive and hard to
> find.
> 
> We show the A-199 in a suitcase with PSUII in Frankfurt. I will tell you the
> results after the fair.
> 
> Best wishes
> Dieter Doepfer
> 
> 
> 
> Yahoo! Groups Links
> 
> 
> 
> 
>

> > results after the fair.
> > 
> > Best wishes
> > Dieter Doepfer
> > 
> > 
> > 
> > Yahoo! Groups Links
> > 
> > 
> > 
> > 
> >

>
> 
> hello-
> great link.  thx!  expensive yes, though the amount needed is 
> small...who can put a value on a wild reverb sound?
> --t
> 
> 
> > Hi Dieter and group
> > 
> > In English is know as mu-metal, and very expensive, you can get some
> > of them here:
> > http://www.lessemf.com/
> > 
> > Best Regards,
> > 
> > Josue.

> > > of them here:
> > > http://www.lessemf.com/
> > > 
> > > Best Regards,
> > > 
> > > Josue.
>

>
> ernst-
> as it happened, i never tried the mu metal.  i didn't find the price 
> prohibitive, since it only required 20$ to do the job, and i did find 
> that goofy sheilding company kinda charming, but i did something else 
> which turned out pretty easy.
> 
> i drilled a hole through the wood strip across the bottom of the 
> front panel, cut the rca cable coming from the pc board halfway 
> between the board and the jacks, threaded the remaining lenth of 
> cable through the hole, screwed the module in, and soldered the jack-
> end of the cable back onto the rest of the cable.  whenever i pack up 
> the suitcase for a gig, i just unplug the tank (which sits wherever 
> away from the psu) and tuck the cable in along with my patch mess and 
> close the door.
> 
> doesn't answer your question, but if i recall correctly you already 
> drilled mults in your wood strip, so you probably wouldn't find 
> another hole sacrelige.
> 
> ok-tom
> 
> 
> --- In Doepfer_a100@yahoogroups.com, "Ernst Karel" <eklkrl@g...> 
> wrote:
> >
> > 
> > Can anyone report on having tried this mu-metal in a suitcase with 
> the old power supply?  
> > Does it completely eliminate the hum?
> > 
> > thanks,
> > Ernst
> > 
> > --- In Doepfer_a100@yahoogroups.com, "thomasborax" 
> <thomasborax@y...> wrote:
> > >
> > > 
> > > hello-
> > > great link.  thx!  expensive yes, though the amount needed is 
> > > small...who can put a value on a wild reverb sound?
> > > --t
> > > 
> > > 
> > > > Hi Dieter and group
> > > > 
> > > > In English is know as mu-metal, and very expensive, you can get 
> some
> > > > of them here:
> > > > http://www.lessemf.com/
> > > > 
> > > > Best Regards,
> > > > 
> > > > Josue.
> >
>

>
> My A-199 has an awful buzz, i've tried moving it as far away from
> the PSU as possible, there's still a buzz, its pretty much useless
> at this point because its so bad.  So for the Mu-Metal Foil, if you
> were to get some of this, where would you put it on the module? 
> would you just wrap the RCA cord in it?  Thanks! Jon
> 
> 
> --- In Doepfer_a100@yahoogroups.com, "thomasborax" <thomasborax@>
> wrote:
> >
> > ernst-
> > as it happened, i never tried the mu metal.  i didn't find the price 
> > prohibitive, since it only required 20$ to do the job, and i did find 
> > that goofy sheilding company kinda charming, but i did something else 
> > which turned out pretty easy.
> > 
> > i drilled a hole through the wood strip across the bottom of the 
> > front panel, cut the rca cable coming from the pc board halfway 
> > between the board and the jacks, threaded the remaining lenth of 
> > cable through the hole, screwed the module in, and soldered the jack-
> > end of the cable back onto the rest of the cable.  whenever i pack up 
> > the suitcase for a gig, i just unplug the tank (which sits wherever 
> > away from the psu) and tuck the cable in along with my patch mess and 
> > close the door.
> > 
> > doesn't answer your question, but if i recall correctly you already 
> > drilled mults in your wood strip, so you probably wouldn't find 
> > another hole sacrelige.
> > 
> > ok-tom
> > 
> > 
> > --- In Doepfer_a100@yahoogroups.com, "Ernst Karel" <eklkrl@g...> 
> > wrote:
> > >
> > > 
> > > Can anyone report on having tried this mu-metal in a suitcase with 
> > the old power supply?  
> > > Does it completely eliminate the hum?
> > > 
> > > thanks,
> > > Ernst
> > > 
> > > --- In Doepfer_a100@yahoogroups.com, "thomasborax" 
> > <thomasborax@y...> wrote:
> > > >
> > > > 
> > > > hello-
> > > > great link.  thx!  expensive yes, though the amount needed is 
> > > > small...who can put a value on a wild reverb sound?
> > > > --t
> > > > 
> > > > 
> > > > > Hi Dieter and group
> > > > > 
> > > > > In English is know as mu-metal, and very expensive, you can get 
> > some
> > > > > of them here:
> > > > > http://www.lessemf.com/
> > > > > 
> > > > > Best Regards,
> > > > > 
> > > > > Josue.
> > >
> >
>