Hello,

I can tell you why the sales on the +5V supply was poor:

1. Not everyone wants to DIY.
2. Many people are afraid to DIY with power supply stuff.
3. Years ago there were not that many digital modules.
4. DIY people tend to buy from elsewhere anyway.

If you plan to abandon the +5V you should at least act consistent:

1. Change the graphic
http://www.doepfer.de/a100_man/a100t_3.gif
and add an 'obsolete' to the +5V rail.
2. Pump up the +12V to handle the additional current.

Btw. if you would use something like the Meanwell T60B or the Taco TXL
060-0522TI you could have +5V AND make the power supply cheaper. Then no
one would complain to pay more for the +5V supply.

Cheers
Joachim

Am 10.11.2010 15:43, schrieb yahoo@... :

> Though your argumentation is a bit "strange" from my point of view I'll
> answer nevertheless:
>
> We had a +5V supply available and you still find it on our website:
>
> www.doepfer.com> PRODUCTS> A-100> Accessories> A-100NT5
>
> But it is marked "no longer available" as the sales were extremely poor. It
> took more than 5 years to sell the first series of these supplies. All A-100
> rear panels were equipped with four holes to mount the A-100AD5 (in the
> meantime these holes are no longer available in the rear panels) and the
> A-100 standard PSU was prepared to connect the A-100NT5.
> We could simply "resurrect" the A-100NT5 provided that there are sufficient
> inquiries. But apart from this fiendly request nobody was asking for a +5V
> supply during the last few months (or even years).
> And if you look at our special list (Sonderliste) you will see that we offer
> +5V supplies since many months for free to the "Volk" provided that the user
> is able to install the supply himself:
> www.doepfer.com> SPECIALS> "2-fach-Netzteil, Eingang 230V AC, Ausgang
> +5V/2.5A stabilisiert"
> (i.e. dual supply, 230 V mains voltage, +5V/2.5A stabilized)
>
> And there is mentioned that it can be used for A-100 too if +5V are
> necessary.
>
> Best wishes
> Dieter Doepfer
>
>
>> -----Ursprüngliche Nachricht-----
>> Von: Doepfer_a100@yahoogroups.com
>> [mailto: Doepfer_a100@yahoogroups.com ]Im Auftrag von sonicwarrior@...
>> Gesendet: Mittwoch, 10. November 2010 11:46
>> An: Doepfer_a100@yahoogroups.com
>> Betreff: Re: 1 Request for a +5V/+12V/-12V power supply in
>> the standard housings
>>
>>
>> Hi,
>>
>> the chicken/egg problem is discussed at Muffwiggler's, too. I'll
>> just quote daverj from the 'some frustration w/ Zeus and POWER' thread:
>> http://www.muffwiggler.com/forum/viewtopic.php p=327649#327649
>>
>> <quote>
>> The 5 volt power issue being talked about in a couple of other
>> threads is more about planning for the future, and maybe changing
>> things for the better. The current state of affairs with 5 volts
>> is in a "chicken or the egg" state.
>>
>> 1 - manufactures who design a module that could use lots of 5
>> volts, only sometimes use the 5 volt bus because the cases today
>> typically have no 5 volts or a limited amount of it.
>>
>> 2 - the case manufacturers don't add large 5 volt supplies
>> because the majority of modules don't use the 5 volt bus.
>>
>> 3 - loop back to #1
>>
>> The 5 volt thread is trying to convince people to break the above
>> cycle by making large 5 volt supplies standard so that module
>> designers will start using the bus more.
>> </quote>
>>
>> Btw. the ZEUS power supply from Tip Top Audio already has a
>> dedicated +5V power supply, see:
>> http://www.muffwiggler.com/forum/viewtopic.php t=23105
>>
>> The module manufacturers won't change anything until there is a
>> broad on-board supply for +5V which means that Doepfer as the
>> Eurorack grandfather has to step in or nothing will ever change.
>>
>> I myself will stop buying any housing until there is a +5V supply
>> in there.
>> I will also not buy any module with an on-board +5V regulator
>> which draws current from the +12V rail without the option of
>> using the +5V rail instead. That concretely means I won't buy the
>> A-187-1 and A-189-1 which are on my want list until then.
>>
>> Wir sind das Volk!
>>
>> Greetings
>> Joachim
>>
>> -------- Original-Nachricht --------
>>> Datum: Tue, 09 Nov 2010 19:38:51 -0800
>>> Von: James Husted< james.husted@... >
>>> An: Doepfer_a100@yahoogroups.com
>>> Betreff: Re: 1 Request for a +5V/+12V/-12V power
>> supply in the standard housings
>>
>>> As far as I know there is only one module in the Doepfer lineup that
>>> requires a separate +5V supply and that is the MIDI>CV
>> converter. Of all the
>>> manufacturers out there I think that Analogue Solutions and
>> Analog Systems are
>>> the only companies in the eurorack format that require a separate +5v
>>> signal - all the digital modules I know of convert the +12V to
>> +5 on the module
>>> so the "not supporting the +5V rail" is a industry trend and not just
>>> something Doepfer is doing. What Digital modules out there
>> would use this
>>> separate +5V line if there was one Is the Digital
>> ground>Analog ground a real
>>> problem on the modules that do convert it onboard. I assume it
>> is isolated
>>> on them. I think the major problem is that the digital modules that do
>>> convert the +12v make an extra load for that side of the
>> supply. More should
>>> convert from the -12v supply to balance it out. There are very
>> few modules
>>> that even offer an option to choose to use the +5v supply bus -
>> IIRC Scott
>>> Harvestman said he once offered a jumper option on one of his
>> modules and
>>> nobody used it so he discontinued it. Until the module makers
>> all convert over
>>> to using the +5v bus there is no reason to burden the rest of the
>>> non-digital users with the expense of a separate supply.
>>> -James
>>>
>>> **Disclaimer** As you can see from my sig I design for
>> Synthwerks and have
>>> to disclose that we make a module (the PC5V) that converts the
>> +12v supply
>>> to +5v and pipes it to the bus (and front panel with a level control. I
>>> have to admit it is not a big seller for these reasons. There
>> seems to be a
>>> lot of modules that require it.
>>>
>>>
>>> James Husted
>>> Designer, Synthwerks LLC
>>> www.synthwerks.com
>>> james@...
>>> synthwerks@...
>>>
>>>
>>> On Nov 9, 2010, at 1:31 PM, Joachim wrote:
>>>
>>>> Hello there,
>>>>
>>>> there is currently a lot of talk going on about Doepfer not supporting
>>>> the +5V rail with the standard housings. Here is the thread:
>>>> http://www.muffwiggler.com/forum/viewtopic.php t=24399
>>>>
>>>> Short summary:
>>>>
>>>> a. There is definitely a demand that the power supply in the standard
>>>> housings supports +5V
>>>> b. +5V is used for digital modules and therefore should have
>> a separate
>>>> digital ground on the whole way (module => cable => bus board
>> => power
>>>> supply) to avoid digital noise coming over the common ground.
>>>>
>>>> Necessary steps:
>>>>
>>>> For a:
>>>> 1. Using either tri output power supplies like the ready-made
>> Meanwell
>>>> T-60C or an additional 5V power supply, e.g. the Meanwell S-25-5 with
>>>> 5,0A of +5V. Meanwell is just an example, there are several other
>>>> manufacturers like Power One and a current transformer with
>>>> +5V/+12V/-12V outputs could be used, too, of course.
>>>>
>>>> For b:
>>>> 2. Change the specification for the power connection so that
>> one of the
>>>> three ground lines is reserved for the digital ground while the other
>>>> two remain for the analog ground. It would still be compatible to the
>>>> old specification with the downside of more noise which is
>> what happens
>>>> at the moment anyway when the +5V is taken from the +12V rail
>> without a
>>>> separate digital ground.
>>>> 3. Change the bus boards to implement the separate digital ground.
>>>> 4. Change the existing +5V modules to make use of the
>> separate digital
>>>> ground.
>>>>
>>>> While we are at the subject of a bus board change: There is a
>> big demand
>>>> for keyed connectors, too. They would help to avoid wrong connections
>>>> for modules which use the specification, force the
>> manufactures who are
>>>> ignoring the key position specification to support it and help to
>>>> connect the modules which is currently a pain in the a**.
>>>> I myself would gladly pay the slightly higher price for keyed
>> connector
>>>> bus boards.
>>>>
>>>> Cheers
>>>> Joachim
>>>>
>>>>
>>>> ------------------------------------
>>>>
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>>>>
>>>>
>>>>
>>>
>>>
>>>
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>>
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