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AlephJ Mimi! (Mini)
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Old 9th January 2017, 07:00 PM   #111
lykkedk is offline lykkedk  Denmark
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Default One channel up

Quote:
Originally Posted by Zen Mod View Post
aha

in spirit of the day , you can name it Aleph SissyJ

Maybee....

But https://www.youtube.com/watch?v=nzkubfTPDaU ...

AlephJ Mimi is now set at Bias ~1,3A.(NON Sissy Bias) DC-offset is pending up/down very stable near "0"...

Going much higher on volume on my DCG3 (2xgain) preamp will be to much Speaker(s) are 90dB

I am really amazed by first impression!... not that i can tell anything about soundquality, but amp. is completely quiet; even with all cables messed up like a birds nest

So we (*I) now know that amp. is giving enough gain/voltageswing for my system to be played to the max. -Perfect.

Hope you enjoy my video... just for fun

Jesper.
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Old 9th January 2017, 07:18 PM   #112
Zen Mod is offline Zen Mod  Serbia
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AlephJ Mimi! (Mini)
I can bet that pleasure will be quadruple , when you double channels

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Old 10th January 2017, 12:53 AM   #113
didiet78 is online now didiet78  Indonesia
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No burn mark under 0.47 ohm ?
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Old 10th January 2017, 01:33 AM   #114
woody is offline woody
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Any chance of the boards being available ?
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Old 10th January 2017, 02:57 PM   #115
lykkedk is offline lykkedk  Denmark
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Quote:
Originally Posted by woody View Post
Any chance of the boards being available ?
Hello.

The board is only proto (one channel); and i need Didiet78 to make some small changes for me. -The board i created is also NON ums (non diyaudio standerd), so this also have to be considered.

Some of mine precious parts (some capacitors and the 2sj109V) is also parts, which should not be made in a "groupbuy" or like pcb i think.

But i think Didiet78 also have an UMS board ready by now.
I will take contact with the pcbmaster later tonight!, and see if he is able to make some small changes for me?

Let's see future on, i am not nearly finish yet.

Thanks for following my thread

Jesper.
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Old 11th January 2017, 01:13 AM   #116
didiet78 is online now didiet78  Indonesia
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Any chance of the boards being available ?
Standard Aleph J availabe on DIY Audio Store
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Old 11th January 2017, 06:48 AM   #117
lykkedk is offline lykkedk  Denmark
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Default Dual torrids possible in firstwatt PSU ?

Hello.

For testing two channels, i need a bigger torrid than the one 120VA i got now.
I am planning to do dual PSU in one chassis.

I can still source a torid like the one i allready got, so two identical torrids.

But i am in doubt if it's possible to use two torrids on the same PSU, for testing.
It will be some time before i will make new psu boards, so testing with my old one, would be nice!

Anybody know that???

0120P1-2-015 | 2 Output Toroidal Transformer, 120VA, 2 x 15V ac | Nuvotem Talema

Jesper.
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File Type: jpg Dualtorrids.jpg (110.0 KB, 200 views)
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Old 11th January 2017, 08:24 AM   #118
Zen Mod is offline Zen Mod  Serbia
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I would believe them (enough for paralleling of secondaries) only if they're wound bifilary

in any other case , each secondary get dedicated bridge , then do whatever you want

good thing is that you can use smaller bridges for that
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Old 11th January 2017, 09:35 AM   #119
lykkedk is offline lykkedk  Denmark
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Quote:
Originally Posted by Zen Mod View Post
I would believe them (enough for paralleling of secondaries) only if they're wound bifilary

in any other case , each secondary get dedicated bridge , then do whatever you want

good thing is that you can use smaller bridges for that
So looking at datasheet of that torrid, say's parallel and seriel is possible.
I also once paralled a torid, without problems.

Quistion is more about, how psu is reacting on this?

Quote:
Product Details
Open Style with Leads, 15VA to 1000VA

High quality open style toroidal transformers with a single 230Vac 50/60Hz primary winding. Twin secondary windings may be connected in series or parallel or used independently.
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Old 11th January 2017, 09:37 AM   #120
Zen Mod is offline Zen Mod  Serbia
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I can't see nothing wrong
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