Hi Guy's,
I finally found some more time to work on my build.
If anyone would like to see the photos I've made a build album.
Wolverine project- Build Album
In time I'll update the build guide with some of the images.
Just a small note.
When installing Q7, Q8 they were clamped together and I soldered the bottom while they were clamped together. Then I removed the heatsink then soldered the top.
The solder on most legs flowed through. Soldered the top is just a touch up.
I then reinstalled the Heatsink Q7, Q8
I finally found some more time to work on my build.
If anyone would like to see the photos I've made a build album.
Wolverine project- Build Album
In time I'll update the build guide with some of the images.
Just a small note.
When installing Q7, Q8 they were clamped together and I soldered the bottom while they were clamped together. Then I removed the heatsink then soldered the top.
The solder on most legs flowed through. Soldered the top is just a touch up.
I then reinstalled the Heatsink Q7, Q8
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Hi Stuart, which drivers are you using in your build? Also power into 4 ohms using 2 x 40v 500va transformers in the region of 250wpc?
Which
Hello Omed,...would this be something I could opt for? I'm looking at 2 PCB's with 2 transformers. I'm not looking to have world of power. Just a decent amount well within the range of the speakers and compoents.
They have 3 quality lines transformers; standard, audio and supreme audio. The supreme type is popular among valve enthusiasts, as it can be placed om top of the housing. The choice is up to you, there is a significant price difference.
Whatever you decide, you need one with dual secondaries, so not 45 volt but 2 X 45 volt
Whatever you decide, you need one with dual secondaries, so not 45 volt but 2 X 45 volt
Instead of two transformers, you can order a single custom wound 800va Supreme transformer with 4 x 45V secondaries. This will be your foundation for a dual mono psu.
@reddish75 , @marktd
For drivers I am using the 2SC4793 & 2SA1837 for there high Ft value.
I managed to source some genuine Toshiba components last year during the development of the Wolverine.
These were verified using my curve tracer.
I also have some from profusion which I ordered last year as well.
I have some to spare. Send me a PM and I'll send you some if your interested.
You should be Approaching 250WRMS into a 4 ohms load using the power supply you quoted.
This table is on sheet 2 of the BOM spreadsheet.
Still a bit confused about this topic I'm afraid. Is 2 x 45 volt actually meaning 1 winding having 90 volt with a centre tap splitting them in 2 effectively?
And then the +/- railvoltage would be something like 45 x sqrt2 minus losses or am I completing missing the boat here?
reg
w.
Maybe a ready-made SMPS would be the easier, but less instructive way to go for you.
With a linear supply solution, you will need to consider a few more things like inrush limiting or a standby PSU in case you don't want to have a full mains voltage switch in the front panel or if you want remote control. Chassis integration is often underestimated 😉
With a linear supply solution, you will need to consider a few more things like inrush limiting or a standby PSU in case you don't want to have a full mains voltage switch in the front panel or if you want remote control. Chassis integration is often underestimated 😉
No, not completely. Just consider two separate windings of 45VAC without a center tap. Or easier way, but equally effective, consider an SMPS (as I did) and you'll solve all the problems!
Gaetano.
Ok...don't know anything about SMPS PSU's really but I guess its a bit more plug and play. Which ones are suitable options?
Microaudio Cobra S2 is the more tested on this thread. You can consider Hypex SMPS1200A400 and Connex Electronic SMPS800RE which are good options too. I own the Hypex and the Connex ones and they're very quite.
Gaetano.
Gaetano.
No, while one 90V secondary with a centertap is possible, two separate 45V secondary's will give full flexibility for the rectifier configuration. The preferred way is to use two rectifiers per channel. So joining the voltages at DC, not AC. There is a diagram of this configuration in @stuartmp build album.
https://photos.app.goo.gl/brKq4DmVTjaR3cNG7
Will consider both options. My heart says transformers as I'm 56 and not afraid to take this project headon but we'll see. Lots of stuff to buy. I ordered 2 efs3 3 pairs boards inluding the input stages. I'll be needing a neat chassis as well amongst things.
Yes.,... seen that pic and that looks pretty straight forward to me. As this is apparently 2 seperate windings but connected in the middle so whats the difference with a center tap config?
Yeah...think / hope I got it now. Was reading the wolverine manual. The document with the dual mono setup which apparently describes the 1 channel 1 rectifier 1 secondary centertap solution If I understand it correctly. The 2 secondary 2 rectifier per channel setup as with Stuart's drawing is indeed different with no center tap. Is there any advantage / disadvantage between the 2?
