Hi!
I soooo close to made a deal for one trannie 2x22V/400V - but even better - maybe I will get 2 of them ...
So: in first case - I intend to use it for A3 (I mean - 4 transistors/channel, no balanced input, ..) ... With little higher PSU voltage but nevertheless ...
But if getting 2 trannies - I'm playing with the idea to build two more A5-look-a-like monoblocks ... OK, a little bit lower voltage than original - but I could bias it a little bit harder - my speakers have nominal impendance 5R - so I guess the extra current will be good thing
What do you experts think about such A5 PSU?
Thanks!
I soooo close to made a deal for one trannie 2x22V/400V - but even better - maybe I will get 2 of them ...
So: in first case - I intend to use it for A3 (I mean - 4 transistors/channel, no balanced input, ..) ... With little higher PSU voltage but nevertheless ...
But if getting 2 trannies - I'm playing with the idea to build two more A5-look-a-like monoblocks ... OK, a little bit lower voltage than original - but I could bias it a little bit harder - my speakers have nominal impendance 5R - so I guess the extra current will be good thing
What do you experts think about such A5 PSU?
Thanks!
Oil said:as I can only easily obtain tranformers with 25v secondary windings...
Do a google on Amplimo e.g..
2x22 is custom in their range. Swift delivery, paypal, excellent qualitiy.
There must be more suppliers out there who produce and deliver these trannies.
Marc
MikeW said:I built an Aleph 3 with 21 volt AC secondaries and four pairs of outputs per channel. Cranked up the bias to 3 amps and it sounds great. It has a C-R-C for filtering and is running +/- 26.5 volts.
Build it you will like it.
MikeW thanks for practical experineces! I'm quite sure I will build up one stereo A3 if getting only one trannie ...
But what about my second idea - if getting two trannies - "can" (OK, I know I can - I mean will it be a OK working A5 derivate) I make a sort of mono A5 (I allready have set of 2 mono excelent PCBs for A5) - OK with lower voltage than original - but with higher bias current - 'cause I have enough hetasinks to cool down around 200W/channel with no problems at all ..
As said - my speakers are 5ohm ones - and I guess it's better in my case to have higher current "capability" than voltage itself?!?
Oh btw - the thing is - I have 20 matched irfp240 and a set od two mono A5 PCBs by Kristijan (those I intend to use for A5) and home made stereo PCB for A5 taht was meant for A5 before I've got Kristijan's ones - which can be easilly converted into an Aleph with more/less output devices - so I thought it would be nice to spent those 8 transistors that will be left and rearange the PCB from A5 look alike to more A3 (no balanced input, less transistors) ......
Hmm - a little bit complicated story of mine I guess ...
Thanks!
Hehe - good one
Well I think you know what my problem is - with those 4 heatsinks I have there are some problems with stereo chassis - but the trannie for A5 I allready have is only one ...
With those two I could separate it into two chassis and finnaly solve my "engineering problems" with designing the chassis itself
Well I think you know what my problem is - with those 4 heatsinks I have there are some problems with stereo chassis - but the trannie for A5 I allready have is only one ...
With those two I could separate it into two chassis and finnaly solve my "engineering problems" with designing the chassis itself
Stabist said:Yeah Leon I agree - more voltage. more bias, more heat ...
But in my case (for A5 mono) - less voltage+much more bias-->I hope more heat and better sound
On your place I will try this. Why not ? More bias current, more speaker control and not much dissipation, becouse of lover power supply voltage. You have everything to make Aleph 5 to work, and test how it works with diffrent supply voltage and bias. Then make a decision what chasis will you build.
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