A lot of good possibilities, Thank you guys🙂
I must admit that i fell in love with the Lumberg solution, when i saw that it is good for 5A. Very compact too
I must admit that i fell in love with the Lumberg solution, when i saw that it is good for 5A. Very compact too

I think the absolute minimum is 25V. When the Leds do not glow you have too little.
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I just salvaged a nice transformer from a JVC home theatre, and measured it to 18,4-18,4v unloaded. with a simple prereg. and both paradise boards connected, i measure +/-23v and all the leds are glowing. Best of all the heatsinks cant be used as a stowe anymore, temp. around 40 degrees Celsius.
So how low can we go.😀
So how low can we go.😀
Backside is that i used it to keep my coffeecup warm while soldering, so now i have to remember to drink it faster😀
Leaving 5V (23V-18V) for the current sources is a low number, I think it should not go below that. While they will still be working, the noise isolation they provide will degrade a little bit, due to the VAS parameter of the bipolars increasing at low VCE - not dramatic though. Maybe Frans has looked into this, any comments?
I'm here, catching up with the 'after holydays work' and lurking a bit 🙂. I will check it out; yes it seems a bit low. This was discussed before, I will dig it up.
This is the one http://www.diyaudio.com/forums/analogue-source/154210-mpp-647.html#post3110294 #6462 it states that 24Vdc (on the input side) is the absolute minimum.
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I just salvaged a nice transformer from a JVC home theatre, and measured it to 18,4-18,4v unloaded. with a simple prereg. and both paradise boards connected, i measure +/-23v and all the leds are glowing. Best of all the heatsinks cant be used as a stowe anymore, temp. around 40 degrees Celsius.
So how low can we go.😀
The 23Vdc is below spec 🙂 you need a bit more.
He sent me a message that he is "officially" back from vacation, so he should be here any minute ;-)
PS: Oh there you are....
PS: Oh there you are....
The 23Vdc is below spec 🙂 you need a bit more.
A quick run in the simulator shows these output residuals for:
Green 25Vdc, Blue 24Vdc and Red 23Vdc.
As you see 23Vdc is marginal.
Attachments
It looks to me as 25 will be the minimum.
25Vdc is the recomended minimum as specified in Mpp #6462.
Anybody with a take on interconnects between preamp cabinet and psu cabinet?
Wire? connectors? Etc.?🙂
For powersupply I use microfonplugs for radio devices like this.
Up to 60V and 1A.
I dont know if it makes any difference, but the trannies i use are ON semi MJE15032/33🙂
Those will work fine 🙂
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