Jan-Peter said:
Thanks JP for the answer.
But where come from the -20.6V with no charge and MUTE ON?
And why 180mV with 100 Ohms charge?
I can see the 12V when MUTE is OFF with no charge.
??? I don't know....
Does the amps works ok?
Perhaps you can post the full schematic of your setup?
JP
Does the amps works ok?
Perhaps you can post the full schematic of your setup?
JP
Jan-Peter said:
Not done yet but the test circuit is really simple.
PSU (MBR10100 + BHC ALS10S = 42V) -> module (mute directly soldered on GND)
Input shorted. Output tested with charge and without charge. For the test, the GND is not connected to the box. I test the speaker output directly. The DC protection circuit have been completely removed.
The module have been tweaked as this : new op-amp OPA2134 and coupling caps replaced with 47UF BG NX HiQ (no 22UF in stock sorry).
The module works well connected to a 4 Ohms speaker.
What's the dark side of the zener+resitor tweak?
Bgt said:
I tested only 5 hours box closed. More hot than I was thinking. The plate has to have holes above modules for vent but no more. The temp stay cool.
Hi all,
I am considering a pair of UcD180 modules to play with... but before I know what I'm dealing with, I would prefer to use some 24V transformers I have at hand (to keep costs down).
Is this possible, or will I get into trouble?
(I saw the data sheet for the UcD400, hich would indicate problems with my supply voltage being too low.)
Jennice
I am considering a pair of UcD180 modules to play with... but before I know what I'm dealing with, I would prefer to use some 24V transformers I have at hand (to keep costs down).
Is this possible, or will I get into trouble?
(I saw the data sheet for the UcD400, hich would indicate problems with my supply voltage being too low.)
Jennice
24 VAC gives you some 33 VDC and the UcD180 modules ask for a minimum of 20 VDC as a supply so you should be fine.
As low as +/-20 V DC? where do you read that (any link?)
Do you know about the low limit for the UcD400, also?
Jennice
Do you know about the low limit for the UcD400, also?
Jennice
On Hypex's website under technical documents UCD180 user's manual, it recommends a minimum of +/- 30V for "optimum sonic performance".Jennice said:
http://www.hypex.nl/docs/UcD180_manual.pdf
For the UCD400 it says +/- 45V.
http://www.hypex.nl/docs/UcD400_manual.pdf
exactly! I read those papers too. That is why I am wondering about the +/- 20V that UrSv mentioned.
But anyway... I guess I'll be ok with a 24V transformer to get a feel of things.
Jennice
But anyway... I guess I'll be ok with a 24V transformer to get a feel of things.
Jennice
The both amps work on such a low voltage! However the op amp stage and the voltge regulator are of course not optimised for such a low voltage.
For testing we always start wih such a low voltage......😉
Jan-Peter
For testing we always start wih such a low voltage......😉
Jan-Peter
stef1777 said:
You're right. There's a review of it with full measurements in the August edition of Stereophile.
Yup,
and the D200 is Ucd400 it seems!
Check out the prices! 😱
Check the reviews on audiogon: Audiogon
😀 😀
I'm going to scare my local high-end store when my dual UcD400 gets finished
Bruno and/or Jan-Peter, are you allowed to tell me how "custom" the modules inside the channel island audio's are?
and the D200 is Ucd400 it seems!
Check out the prices! 😱
Check the reviews on audiogon: Audiogon
😀 😀
I'm going to scare my local high-end store when my dual UcD400 gets finished
Bruno and/or Jan-Peter, are you allowed to tell me how "custom" the modules inside the channel island audio's are?
It you want to know what kind of circuit companies are using inside their products, it's best to ask those companies themselves.
I've looked at Hypex' web page, and it seems two versions are available. The only difference seems to be a (costly !) buffer change.
What versions are you guys (fellow DIY'ers) using?
Bruno: The signal connector looks a lot like the power connector for a 3.5" floppy. Is it the same?
Jennice
What versions are you guys (fellow DIY'ers) using?
Bruno: The signal connector looks a lot like the power connector for a 3.5" floppy. Is it the same?
Jennice
Jennice
If you live near Ruds Vedby in Sjælland you could hear these units! I even have a VariaC so a 24 VAC could be mimiced. And I have the 8620 and the 5532 versions on hand.
PM me evt.
Koldby
If you live near Ruds Vedby in Sjælland you could hear these units! I even have a VariaC so a 24 VAC could be mimiced. And I have the 8620 and the 5532 versions on hand.
PM me evt.
Koldby
koldby,
Thanks for the kind offer. 🙂
I must admit I have no idea where Ruds Vedby is, but I'll have a look. Personally, I have my home in postal area 4000.
Jennice
Thanks for the kind offer. 🙂
I must admit I have no idea where Ruds Vedby is, but I'll have a look. Personally, I have my home in postal area 4000.
Jennice