New Aleph 30 In Progress

[richluvsound]

Quick question Gents ,


speaker output on Chipamp.com boards .... CGND = star ground ... and Ground is the speaker Neg output ?

thanks for you time , Rich

 

[Marra]

Rich; check out this link for the AlephJ. There are other links to a German site with connection schematics which might be helpful.Click on gallery at the bottom

http://translate.google.co.uk/trans...wiki.schuelers.de/tiki-index.php?page=Aleph+J

 

[richluvsound]

Rats ,


I must have every version of the schematic on the web ! I look at all and just go vacant now LOL .

thanks anyway Marra .

 

[tiefbassuebertr]

Usually toroids don't make for good DC chokes, as they work
all too well and saturate. On they other hand, if they work,
they work.

Cores of toroidal transformers from a lot of companies produce a mechanical hum by the present of unwanted dc components (e.g. unsymmetrial clipping of the sine wave) on the mains (sounds often more like a buzzing noise).
Otoh - there are also companies, whose toroidals are extremly quiet, independend of the mains condition.
Can I assume, that the last kind of transformers also suited as a good DC choke resp. DC inductor?

BTW - in this case this paper could be of interest:
http://www.dalitech.com/Resources/Measuring Acoustic Noise Emitted by Power Transformers.pdf

 

[richluvsound]

Out put imbalance ?

Finally had time to repair my A30 , but now I have a low output on the repaired channel .

Could someone advise me on trouble shooting this please ?

Thanks , Rich

 

[Zen Mod]

using unbalanced or balanced input ?

if unbal - did you put shortie between pins 1&3 ?

 

[richluvsound]

the former Sir !

 

[Zen Mod]

well

you know the drill : post schematic , then we can tell what and where to measure

input diff pair current , output current etc.

 

[richluvsound]

Hi Zen,

this is the Schematic I have used ...
thanks , Rich

 

[Zen Mod]

give us voltages across R8 , R18 , R27,R28,Z5

ground both inputs while measuring

 

[richluvsound]

Thanks Zen , I'm in Germany for a few days but shall measure and post results when I get back home .

Rich