[sdiy] Siel OR400 Transformer needed

Eric Wood eric.wood74 at gmail.com
Sat Jul 27 09:31:21 CEST 2013


Agree! AH in the last few days has become a deletion festival!! Maeghan deserves more!

On Jul 26, 2013, at 3:40 PM, Dave Manley <dlmanley at sonic.net> wrote:

> I want to thank the sdiy community for responding so helpfully to Maeghan's request for help.  I suggested she try here after getting a sh&t storm of useless noise on AH.  There are a great bunch of people here and the responses have been technical and to the point.
> 
> Let's hope it stays that way!  :-)
> 
> -Dave
> 
> 
> 
> 
> 
> -------- Original Message --------
> From: M Maeghan Skala <synth.diy at pulsewidthmod.com>
> Sent: Fri, Jul 26, 2013 12:57 PM
> To: ASSI <Stromeko at nexgo.de>
> CC: Synth-diy at synth-diy.org
> Subject: Re: [sdiy] Siel OR400 Transformer needed
> 
>> here's the schematics for the synth https://docs.google.com/file/d/0B8AGUCtwqUz4bnNFQnNWUGVrMk0/edit?usp=sharing
>> 
>> hope this helps
>> 
>> 
>> On Jul 26, 2013, at 3:48 PM, ASSI <Stromeko at nexgo.de> wrote:
>> 
>>> On Friday 26 July 2013, 11:16:04, Steve Lenham wrote:
>>>> BTW, it is OK to use a higher VA-rated transformer if it is easier to
>>>> source and will physically fit.
>>> 
>>> If this is intended as a replacement for something built pre 1985 or so, 
>>> then I'd not make that recommendation without looking at the indivdual 
>>> circuit.
>>> 
>>> Most often a the higher rated transformer will have less voltage drop under 
>>> load (depending on the core material and winding style used this could be 
>>> more than 10%).  This, in combination with the now higher line voltage (up 
>>> from nominally 220V to 230V and in most places another 5V higher on average) 
>>> is enough to push some aged components over the edge, especially if their 
>>> rating was somewhat borderline to start with.
>>> 
>>> 
>>> Regards,
>>> Achim.
>>> -- 
>>> +<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+
>>> 
>>> Factory and User Sound Singles for Waldorf rackAttack:
>>> http://Synth.Stromeko.net/Downloads.html#WaldorfSounds
>>> _______________________________________________
>>> Synth-diy mailing list
>>> Synth-diy at synth-diy.org
>>> http://synth-diy.org/mailman/listinfo/synth-diy
>> 
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