Building a symmetrical psu B1 buffer - Page 189

CeeVee · 04:20 PM

Quote:

Originally Posted by korben69

My mistake, the tansformer is 2x15v. 2x12 is a typo. Some Selectronic RCore are oversized as mine, 2x15v gives about 19.5v at the output...

Hi Korben,

Why do we need more than 1A on the secondary of the trafo....i was planning to use a Selectronic 30VA Rcore...fits nicely in a 1U box ( i like compact units ).

Edit: ok read thread a bit more...sorry for jumping the gun.....Salas has answered this....15-0-15 30VA is enough ( as i expected )....

Salas · 13th August 2010, 04:19 PM

They should be halving a return or exchange policy for wrongly specified Tx?

korben69 · 04:45 PM

I don't know about return policy from Selectronic as I've bought mine more than 2 years ago for another project.

I've found "SHILCHAR" written on the RCore, this information point me to a WEB site, after some readings company seems to be established in India :
:: Shilchar Technologies Limited ::

I've forgotten to measure what voltage is supplied home by EDF, maybe more than 220VAC...

You're right CeeVee it fits nicely in a 1U enclosure, such as HiFi2000 one's.

Salas · 13th August 2010, 04:48 PM

Merlin El Mago member got 2pcs 2x21V 120VA, one was 5V higher than the other after rectification on the same mains same time, so they must be having some not well specified stock among those Tx.

CeeVee · 13th August 2010, 04:48 PM

Korben

"2x15v gives about 19.5v at the output..."

Is this with no load ? i would guess the rating is for full load....?

korben69 · 13th August 2010, 05:23 PM

It's what I've measured with the DCB1 connected...

Malka07 · 15th August 2010, 01:01 PM

Quote:

Originally Posted by korben69

Malka07, I'll send you a PM for my built, your help will be great. Very nice result, I like the "Zen look" !
I use a Mezmerize board not Hypnotize. I'll try a GoldMinireg as PSU for the 5V.
Your pics show that you've wired the LDR Output(L/R) to the Hypno Input(L/R).
How should I proceed with the Pot on the Mezmerize PCB ?
Should I just ignore it ?

Hi Korben69, As i dont have a Mezmerize, im not too sure...but i think as you said just delete the pot on the Mez, and wire as i did. If you have a look at page 129 post 1289 of this thread you can see a pic of member William2001 lightspeed with Mes and Hypnotize...its difficult to see, but i think he just deletes the pot on the Mez board.

Let us know how you get on, and how it sounds with the Goldminireg

Alon

korben69 · 15th August 2010, 01:17 PM

Thanks Malka07, I've PM William2001 for more informations.
I'll post some pics later when finished

I've to populate the Goldminireg, 5v option. ZD 2.4v missing and OPA134.
Cheers !

AndrewT · 15th August 2010, 02:18 PM

Hi,
Mez has 6 pads to connect the volume pot.
3 for left and 3 for right.
These 6 pads go to the 6 audio connections of the LDR half of an LED/LDR volume control, just like a normal volume control pot.
The LED half of the LED/LDR volume control needs the control voltages fed to it from a 5V supply and a real dual track 100k log law pot. These control voltage connections are just like George and Uriah have repeatedly posted for us.

Marra · 16th August 2010, 02:27 PM

Finally managed to read through all the posts.I'm really looking forward to receiving my Blue Hypno boards and starting my build.
Regarding the Selectronique R core transformers would I be better off going for the 12+12 secondaries as they seem to output more volts than spec or do I just strap the mosfets to the case and run hotrodded?

13th August 2010, 04:42 PM	#1883
korben69 diyAudio Member Join Date: Nov 2006 Location: Near Lyon	I don't know about return policy from Selectronic as I've bought mine more than 2 years ago for another project. I've found "SHILCHAR" written on the RCore, this information point me to a WEB site, after some readings company seems to be established in India : :: Shilchar Technologies Limited :: I've forgotten to measure what voltage is supplied home by EDF, maybe more than 220VAC... You're right CeeVee it fits nicely in a 1U enclosure, such as HiFi2000 one's. Last edited by korben69; 13th August 2010 at 04:45 PM.

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13th August 2010, 04:19 PM	#1882
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	They should be halving a return or exchange policy for wrongly specified Tx?

13th August 2010, 04:48 PM	#1884
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Merlin El Mago member got 2pcs 2x21V 120VA, one was 5V higher than the other after rectification on the same mains same time, so they must be having some not well specified stock among those Tx.

13th August 2010, 04:48 PM	#1885
CeeVee diyAudio Member Join Date: Dec 2006	Korben "2x15v gives about 19.5v at the output..." Is this with no load ? i would guess the rating is for full load....?

13th August 2010, 05:23 PM	#1886
korben69 diyAudio Member Join Date: Nov 2006 Location: Near Lyon	It's what I've measured with the DCB1 connected...

15th August 2010, 01:17 PM	#1888
korben69 diyAudio Member Join Date: Nov 2006 Location: Near Lyon	Thanks Malka07, I've PM William2001 for more informations. I'll post some pics later when finished I've to populate the Goldminireg, 5v option. ZD 2.4v missing and OPA134. Cheers !

15th August 2010, 02:18 PM	#1889
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, Mez has 6 pads to connect the volume pot. 3 for left and 3 for right. These 6 pads go to the 6 audio connections of the LDR half of an LED/LDR volume control, just like a normal volume control pot. The LED half of the LED/LDR volume control needs the control voltages fed to it from a 5V supply and a real dual track 100k log law pot. These control voltage connections are just like George and Uriah have repeatedly posted for us.

16th August 2010, 02:27 PM	#1890
Marra diyAudio Member Join Date: Nov 2009 Location: Near Lincoln	Finally managed to read through all the posts.I'm really looking forward to receiving my Blue Hypno boards and starting my build. Regarding the Selectronique R core transformers would I be better off going for the 12+12 secondaries as they seem to output more volts than spec or do I just strap the mosfets to the case and run hotrodded?