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Input and switch boards for Soekris DAM1021 DAC

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B

bambadoo

Member
Joined 2003
Have one spare including the smd components soldered on. One input and one switch board. Rev 1.1. Never used.
Same price as the rest? 25€ + shipping is that fair?
Picture soon.
 

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G

gilesw

Member
Joined 2012
Hi WCWC, thanks for the info. I'm afraid I bought all these parts 2 years ago and they've been laying in a box since then but I'm hoping to make some progress this week on it.

Because I'm a novice at this stuff I was going to start out by just buying a multi voltage output psu like this :-

https://www.amazon.co.uk/ZOZOTMUniv...&qid=1501659146&sr=8-1&keywords=power+adapter

before I even think about using the toroidal transformer. (https://sklep.toroidy.pl/en_US/p/TT...grade-transformer-TSAS20VA-voltage-to-50V/373)

From the looks of the dam manual I should be able to just use a standard 12v dc adapter to power that.
What did you mean by dual rail?
 
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D

Dimdim

Member
Joined 2008
It seems that the soekris.eu site needs some updating.. I can no longer find the manual for the 1021 and the spec sheet that does exist is kind of misleading, stating as power requirement this: "Power input 7-8V AC or +-7-15V DC max 5W".

This seems to imply that a single secondary transformer is required which is not accurate. The "+-7-15V DC" is accurate though.

The 1021 requires a dual secondary power transformer supplying 7-8VAC (not more than that!) or a bipolar DC power supply providing +/- 7-15VDC.

If I were you I'd go with a bipolar DC power supply providing about +/-9VDC.
 
G

gilesw

Member
Joined 2012
Hi DimDim,

I'm afraid I don't know what a bi-polar power supply is. I know very little about electronics which is why I just want to get this project started with 2 cheap DC power supplies that I can buy in any shop.

Working with mains AC and that toroidal is project 2. Project 1 is just getting it to switch on.
 
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