I love the clear Plexiglass mounting plate above the caps. Also the solid copper bars that the Mosfets are mounted onto.
Finished my F6. Still some tidying to be done.
Many thanks to Nelson Pass and 6L6 and all the other forum members posting here.
PSU is:
Sounds very good without any hum.
Not sure whether it is better than the F5 (v3) I have built before in the same case.
Many thanks to Nelson Pass and 6L6 and all the other forum members posting here.
PSU is:
- 2 Meanwells, 24V, each 201 Watts, switching at 70kHz
- 1 CLC Filter, dual rail, matching the 70 kHz (49 kHz)
- 4 PO89Z arranged for dual rail
Sounds very good without any hum.
Not sure whether it is better than the F5 (v3) I have built before in the same case.
@Jacruzer787 Thank you! I had no success using a transformer-based/ linear PSU. I always had a little bit of hum coming not from the speakers..
And probably less weight as well. I know some people had made some covers for the autoformer, cant remember where. I also don’t know if they fix hum issues. In any case, no need to fix was is not broken!
I don't think I've posted this here yet: I cleaned up the DC wiring a bit on my Zenductor 2 (Burning Amp 2024) in a Modushop Galaxy 2U chassis. I divided up the auxiliary loads: the bias DVMs are now properly powered from their respective amplifier DC supply, and the preamp and the push-button LED (few 10 mA each) are now also split up. All hooked up via an original Lüsterklemme from the old country (or maybe IKEA also uses them here?).
I just buttoned up my first build and thought I would share some pics. I built an Elekit tube amp about two months ago and that went fairly well (it sounds great, just FYI) but it was kind of like doing a paint-by-numbers project. I decided to try something a little bit more free-form for my second build. I have always wanted a good class A solid state amp and the F5M looked like a good one to try. I ended up building it in a 4U/300mm case that I got from Modushop and decided to make a dual-mono power supply for it, which is probably overkill but was fun to figure out. It all works fine and I've been burning it in all week and keeping an eye on things. I ended up with a bit over 1.2 amps of bias current and about 2mv of DC on each speaker output. I also put in the DIY store soft start board (again, probably overkill) and to fit everything in I had to go vertical and mount the PSU boards and the soft start board using maker beam for supports, which works great btw. I would like to thank everyone who has posted on these forums - I picked up a lot of info on how to do this by reading your posts. I haven't really built any circuity like this since the 90's but my wife said that before I can retire I need to find a hobby so I guess this is it! The end result sounds fantastic in my opinion so a big thanks to Mr. Pass for the design and his generosity and a big thanks to all of you for your excellent community.
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Very clean looking, @mloranger ! The progression from Elekit solder-by-numbers to Pass design sounds very familiar... ;-)
What are you using for the signal lines (the cables from the input sockets, with the blue and white conductors)?
What are you using for the signal lines (the cables from the input sockets, with the blue and white conductors)?