Aleph5 Amp Information
I have printed the design file for this to PDF, unfortunately it is a little large, so I've hidden it on the work server .... shhh! - don't tell anyone 😉
http://www.health.adelaide.edu.au/icu/files/aleph5_cad.pdf
The file is a little over 2MB, contains parts list, stuffing diag, PCBs, basic box layout.
I'll try to get a few relevant web pages up in the near future. Alas, I actually use a drawing program (Corel), so the PCBs are only as bitmaps/vectors. If you want just the PCB I have placed a TIFF file here:
http://www.users.bigpond.net.au/mefinnis/passlabs/images/aleph5_pcb.tif
Hope this helps.
cheers, mark
I have printed the design file for this to PDF, unfortunately it is a little large, so I've hidden it on the work server .... shhh! - don't tell anyone 😉
http://www.health.adelaide.edu.au/icu/files/aleph5_cad.pdf
The file is a little over 2MB, contains parts list, stuffing diag, PCBs, basic box layout.
I'll try to get a few relevant web pages up in the near future. Alas, I actually use a drawing program (Corel), so the PCBs are only as bitmaps/vectors. If you want just the PCB I have placed a TIFF file here:
http://www.users.bigpond.net.au/mefinnis/passlabs/images/aleph5_pcb.tif
Hope this helps.
cheers, mark
photo engraving
Could you tell us a little about the photo engraving process used to create the writing on the amps? Did you do this your self or send it out? If you did it your self, could you give us an overview of the process? If you sent it out, could you tell us where you sent it out and how much it cost?
Could you tell us a little about the photo engraving process used to create the writing on the amps? Did you do this your self or send it out? If you did it your self, could you give us an overview of the process? If you sent it out, could you tell us where you sent it out and how much it cost?
Member
Joined 2002
Thanks ill hae to order some board now and start etchin since i havea pack of 100 iron on transfer sheets ill use em now..
Jason
Jason
Jason, this PCB design assumes your using the exact heatsink, with dual flanges spaced by 75mm ......
If you have something like this then go ahead, if not then let me know what spacing you need and I may be able to help.
Near-enough is not good enough, because if there is stress on the FETs heat transfer may be compromised.
Photo-engraving was done commercially. You will be able to find someone nearby who will be able to use an EPS (or other vector) file. Shouldn't cost more than $AUS30 .... not cheap but then I thought it was worthwhile 🙂
cheers, mark
If you have something like this then go ahead, if not then let me know what spacing you need and I may be able to help.
Near-enough is not good enough, because if there is stress on the FETs heat transfer may be compromised.
Photo-engraving was done commercially. You will be able to find someone nearby who will be able to use an EPS (or other vector) file. Shouldn't cost more than $AUS30 .... not cheap but then I thought it was worthwhile 🙂
cheers, mark
Member
Joined 2002
i was going to lay it flat on a 12" x 12" heat sink or somethng else but perferable flat with the fets under theboard..
j'
j'
Warning
Fair 'nuff
No ... actually, no it isn't !!!!!
Think about it, I do not see how you will be able to (solder + mount) the FETs. You'll get to do 1 but not the other with the above PCB.
Fair 'nuff
No ... actually, no it isn't !!!!!
Think about it, I do not see how you will be able to (solder + mount) the FETs. You'll get to do 1 but not the other with the above PCB.
Member
Joined 2002
Member
Joined 2002
I would use the PCB design from my aleph4 notes, where the FET PCBs are separate and allow them to be mounted almost anywhere. This will give you the flexibility you need.
mark
mark
Member
Joined 2002
id like to read your notes but yourpage is down..
j' do you have them inpdf
id like to have the main board it self septrate from the fet boards as you sujest do you have that in pdf too
jleaman@citytel.net
can you email them to me..
j' do you have them inpdf
id like to have the main board it self septrate from the fet boards as you sujest do you have that in pdf too
jleaman@citytel.net
can you email them to me..
Temporary Website
OK, please note this is still in transition, but:
http://www.users.bigpond.net.au/mefinnis/passlabs/
mark
OK, please note this is still in transition, but:
http://www.users.bigpond.net.au/mefinnis/passlabs/
mark
Mark,
nice work on your aleph5, how hot does it get??
I have a chassis already done which has the pretty much the same dimensions as yours but I am resisting the idea of using that for the alpeh 5 for dissipation concerns since I have no idea about the thermal characteristics.
I also have 36 inches of profile 6274 from wakefield.com which has 0.8 C/W/3in which would bring me 20 deg above RT (in theory) but I have no way of cutting it down.
Peter, would you trust a miter saw to cut down something like that? I am kind of afraid of killing myself, or the heatsink, or both.
nice work on your aleph5, how hot does it get??
I have a chassis already done which has the pretty much the same dimensions as yours but I am resisting the idea of using that for the alpeh 5 for dissipation concerns since I have no idea about the thermal characteristics.
I also have 36 inches of profile 6274 from wakefield.com which has 0.8 C/W/3in which would bring me 20 deg above RT (in theory) but I have no way of cutting it down.
Peter, would you trust a miter saw to cut down something like that? I am kind of afraid of killing myself, or the heatsink, or both.
If you use proper blade (in my case Freud non ferrous metal blade, 72 teeth), clamp your piece to the saw, be careful (I mean you don't cut too fast but do it rather in stages), there is no danger of damaging yourself or the heat sink. Don't forget the safety glasses.😎
I can cut anything that fits my Makita mitre saw.😉
I can cut anything that fits my Makita mitre saw.😉
Understatement
Congratulation Mark!
From what I can see this is not just "another Aleph 5". It looks rather like a master piece. As you perhaps remember, I am planning to convert my 4 into a 5. Could you please tell us about the sonic differences.
Regards,
Alois
Congratulation Mark!
From what I can see this is not just "another Aleph 5". It looks rather like a master piece. As you perhaps remember, I am planning to convert my 4 into a 5. Could you please tell us about the sonic differences.
Regards,
Alois
Hi Mark,
great looking amp!
What bias are you running? The heatsinks look rather small to me...
I would really be interested how it sounds compared to your Aleph 4 since I'm planning to rebuild my Aleph5 into something with x5 or x6 and 3A bias @ 32V. I'm hoping this will cure the (slight) bass problem I've got at the moment.
william
great looking amp!
What bias are you running? The heatsinks look rather small to me...
I would really be interested how it sounds compared to your Aleph 4 since I'm planning to rebuild my Aleph5 into something with x5 or x6 and 3A bias @ 32V. I'm hoping this will cure the (slight) bass problem I've got at the moment.
william
Member
Joined 2002
What is the ratings of the power transformers you use? I found a some 125VA / 35V transformers, but I think it is too little for an Aleph. Would it work if I mount 2 or 3 in paralel?
Miguel
Miguel
putting transformers in parallel is generally not a fantastic idea because unless they are very well matched, they will share the load unevenly... that transformer is probably better placed in a preamp.
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