So far the updated spec-sheet only shows enhanced rail voltages beyond ±71VDC for the EF3-5. Is there any chance this will do for an EF3-4 V5 if components are selected correctly?
Best regards
Best regards
Cudos to all involved what a fantastic product I can't wait to build a fully symmetrical version. I may need Perspex lids to show it all off.
Thanks again to all involved these take so much energy and time
Well done
Steve
Thanks again to all involved these take so much energy and time
Well done
Steve
Trying to read up on the Wolverine project. Hope I'm not too late to get in on the group buy.
What would be the ideal transformer voltage to power a single EF3-5 Wolverine?
Is there a schematic for the power supply?
Is there a schematic for the power supply?
Please take a look at the first post of the build thread.
The build guide will contain alot more guidance on power supply layout including schematics
Looking at the data sheets, the MJL21193/4 appears to have double the 100v SOA of the MJL4281/4302 pair.
They are slower however and not as linear with increasing current drain.
Overall a more durable output stage though?
You are right, but I was referring to just the wolverine. MJL21193/4 is not suitable at 4mhz, all wolverine outputs ~30mhz
One thing to note is the Thermal Resistance, Junction−to−Case is significantly worse for MJL21193/4 @ 0.7°C/W as compared to 0.54°C/W for the MJL4281/4302.
Also the absolute power handling of the MJL21193/4 is 30W less than the MJL4281/4302.
I would recommend to use the MJL4281/4302.
-Dan
The capacitors on the input are high quality polypropylene.
Friends, I'm getting out of this GB. Finally I decided for another amplifier from @astx, on the input 170gr on the output exicons lateral mosfets. I think this combination will suit me better in conjunction with the split preamplifier DCG3 + UltraBiB.
But anyway I wish the rest of you a lot of fun when building the Wolverine amplifier. 😍
But anyway I wish the rest of you a lot of fun when building the Wolverine amplifier. 😍
Hi guys,
I am wondering, will 4U Dissipante be sufficient for EF3-5 @ 64V (maybe 71V, undecided yet) build, or 5U chassis is mandatory in this case? The reason is a bit cheesy: my current amp is 4U, and fits perfectly into my listening setup.
Or maybe a concern that I am just a beginner should actually outweigh all other and pull me down to the EF3-4 version? (which, as far as I got it right, will be totally ok to mount into the 4U chassis).
Any advice will be much appreciated!
Also, is there any deadline for this GB? I just started to put everything together "on paper" yesterday, so have to spend some time planning before placing my order.
I am wondering, will 4U Dissipante be sufficient for EF3-5 @ 64V (maybe 71V, undecided yet) build, or 5U chassis is mandatory in this case? The reason is a bit cheesy: my current amp is 4U, and fits perfectly into my listening setup.
Or maybe a concern that I am just a beginner should actually outweigh all other and pull me down to the EF3-4 version? (which, as far as I got it right, will be totally ok to mount into the 4U chassis).
Any advice will be much appreciated!
Also, is there any deadline for this GB? I just started to put everything together "on paper" yesterday, so have to spend some time planning before placing my order.
Thining about getting in on this, but have some questions regarding what needs to be selected in the order spreadsheet. Target would be an EF3-4 64V.
Heatsink Kit (Enough Heatsinks for 2 boards) EF3-4 (IPS, Pre-Driver & Driver): $27.50 USD (6 Heatsinks Total) 1
Transistors (Q105 KSC3503E, Q106 KSA1381E, Q13 KSC3503E, Q11 KSA1381E, 4 Pairs per stereo Amp.) 8
Speaker Protection Board 1 (or 1 per channel?)
Main EF3-4 amp boards (L & R) 2
IPS boards 2 (I assume I need these?)
Not sure what I will do for PSU. I see the dual bridge boards (2 per amp for dual mono), and the Ground lift and T ground boards (will need to research those).
Anything I've missed? Also not sure on those transistors (what choices are there, advantages/disadvantage, etc).
Heatsink Kit (Enough Heatsinks for 2 boards) EF3-4 (IPS, Pre-Driver & Driver): $27.50 USD (6 Heatsinks Total) 1
Transistors (Q105 KSC3503E, Q106 KSA1381E, Q13 KSC3503E, Q11 KSA1381E, 4 Pairs per stereo Amp.) 8
Speaker Protection Board 1 (or 1 per channel?)
Main EF3-4 amp boards (L & R) 2
IPS boards 2 (I assume I need these?)
Not sure what I will do for PSU. I see the dual bridge boards (2 per amp for dual mono), and the Ground lift and T ground boards (will need to research those).
Anything I've missed? Also not sure on those transistors (what choices are there, advantages/disadvantage, etc).
See the FAQ and PSU papers attached to the first post of the build thread, all PSU info answered there.
The heatsink kit is dependent on how you envision mounting the boards to the main heatsinks - parallel with the main heatsink (recommended - IPS and predriver only) or perpendicular to (IPS, predriver and driver). The auxiliary heatsink kits have a separate column to select accordingly, you may have to open the column width or height to see as excel scaling differs from one computer to the next.
Speaker protection is one per channel so order 2 for stereo.
EF3-X is the name of the output stage and the IPS is the input stage, you need both if you're starting fresh.
The heatsink kit is dependent on how you envision mounting the boards to the main heatsinks - parallel with the main heatsink (recommended - IPS and predriver only) or perpendicular to (IPS, predriver and driver). The auxiliary heatsink kits have a separate column to select accordingly, you may have to open the column width or height to see as excel scaling differs from one computer to the next.
Speaker protection is one per channel so order 2 for stereo.
EF3-X is the name of the output stage and the IPS is the input stage, you need both if you're starting fresh.