Hi X. I can’t promise a super speedy turn around (work is keeping me pretty busy these days and I also have The Singing Bush lined up after the Lufo-Lite) but I’d love to help out. Maybe I can build one side into my current Lufo-Lite and compare dead-bug style with PCB style. PM me with details if there are any.
Beautiful mono-blocks, btw! Hope they sound as good as they look.
Thanks, Vunce. The BOM/shopping cart would be super helpful if you get around to it.
The Dual monoblock chassis will house two LuFo boards each (SuSyLu balanced 100w amp). So it looks like a have a lot of PCB building in front of me. Wondering if I should use a bigger 600VA trafo for the SuSyLu. 3.1A x 2 = 6.2A - probably could share a common single rail SLB? 6.2A x 28V = 173VA. Might be too much for a 400VA but perfect for 600VA if sag is an issue.
The Dual monoblock chassis will house two LuFo boards each (SuSyLu balanced 100w amp). So it looks like a have a lot of PCB building in front of me. Wondering if I should use a bigger 600VA trafo for the SuSyLu. 3.1A x 2 = 6.2A - probably could share a common single rail SLB? 6.2A x 28V = 173VA. Might be too much for a 400VA but perfect for 600VA if sag is an issue.
Hi Nigel,
are you using Arduino for DCC railroad models? It’s very slick when you program ATTiny86 DIP8’s for little functions like switches etc.
You can use a motor shield to control the DCC power to drive the trains.
Hi Anand,
That’s a nice looking amp! You even have a frequency response and phase sweep! Cool. How does it sound? I don’t know ZM was making Aleph J boards. I built his Babelfish J variant a few years back.
are you using Arduino for DCC railroad models? It’s very slick when you program ATTiny86 DIP8’s for little functions like switches etc.
You can use a motor shield to control the DCC power to drive the trains.
Hi Anand,
That’s a nice looking amp! You even have a frequency response and phase sweep! Cool. How does it sound? I don’t know ZM was making Aleph J boards. I built his Babelfish J variant a few years back.
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X,
Looking at the schematic it's not too different from the Babelfish J.
I am just going through the usual variants.
I started with the Aleph J from the DIYAUDIO store.
Next is this Aleph J Zen.
And I am currently soldering the Aksa Lender P-mos Hybrid Aleph (ALPHA).
Finally I'll finish this round of comparisons with the ALPHA Nirvana. All of them are going in the NPXP since it's a 5U/400 with tricked out Toroidy + dual SLB supplies.
Best,
Anand.
Looking at the schematic it's not too different from the Babelfish J.
I am just going through the usual variants.
I started with the Aleph J from the DIYAUDIO store.
Next is this Aleph J Zen.
And I am currently soldering the Aksa Lender P-mos Hybrid Aleph (ALPHA).
Finally I'll finish this round of comparisons with the ALPHA Nirvana. All of them are going in the NPXP since it's a 5U/400 with tricked out Toroidy + dual SLB supplies.
Best,
Anand.
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Anand, I have to give you credit for the SLB’s mounted to the front panel. I’m using that configuration in my Babelfish J2 build. It’s a great space saver! Thanks for the idea! Still need to install a pair of SSR’s. Will get around to that one of these days.
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Lookin Good Anand!! Your prepping for quite an amplifier shootout, Hehe!
I was farting around at the bench tonight, no real motivation. I was curious how the resistor ladder will look on LuFo Lite. Here is a pair of Vishay RS-10, 3R resistors installed. I have socket headers installed so I can pull the resistor assembly off for value tweaking. I also have 10W, 1R5 Arcol metal body resistor option that can mount on the heatsink with flying leads.
I was farting around at the bench tonight, no real motivation. I was curious how the resistor ladder will look on LuFo Lite. Here is a pair of Vishay RS-10, 3R resistors installed. I have socket headers installed so I can pull the resistor assembly off for value tweaking. I also have 10W, 1R5 Arcol metal body resistor option that can mount on the heatsink with flying leads.
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Ha! I relocated the power switch on my new table saw. Took 1/4 of the day just to do that. Had to remove the motor from the saw, then from its mount. It worked out; I even came up with an effective safety cover so you cant bump it on accidentally. 3 whole wires, 3 wire nuts. More my style :')
Looking at the components around the TAS5756, I'd like to replace a couple of 0603 surface capacitors, but for me that would be pffssst! with the soldering iron - board ruined.
On the bench tonight Aug 13, 2021 are some LU1014D JFETs. I just soldered up more LU1014D’s onto the TO-247 aluminum IMS adapter PCBs in preparation for my proper LuFo / SuSyLu build. These were AliExpress units matched by Woofertester. Also a random LD1014D was assembled to go with the other random LD1014D.
