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First One - mosfet amplifier module
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Old 19th November 2016, 08:52 AM   #3441
TNT is offline TNT  Sweden
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Well, "Use 1,4 grounding scheme also for 1,2" would actually be clearer

//
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Old 22nd November 2016, 11:45 PM   #3442
Lazy Cat is offline Lazy Cat  Slovenia
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Arrow Here we go

Matched quartets ready to be placed into FO L modules

L.C.
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File Type: jpg IMG_0886.jpg (507.9 KB, 553 views)
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Old 22nd November 2016, 11:49 PM   #3443
aradan is offline aradan  Singapore
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Finally great job! Hope we'll see them live soon

Sent from my ONE A2003 using Tapatalk
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Old 23rd November 2016, 07:51 AM   #3444
Harry3 is offline Harry3  Australia
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Quote:
Originally Posted by Lazy Cat View Post
Matched quartets ready to be placed into FO L modules

L.C.
I've looked at that photo for hours but cannot see the Mosfets
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Old 23rd November 2016, 08:04 AM   #3445
hose4 is offline hose4  Slovenia
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Quote:
Originally Posted by Harry3 View Post
I've looked at that photo for hours but cannot see the Mosfets
Me neither. I always try to look at the black stack of something but before my eyes focus my brain redirects to the right.
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Old 23rd November 2016, 09:52 AM   #3446
maxlorenz is offline maxlorenz  Chile
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Quote:
Originally Posted by hose4 View Post
Me neither. I always try to look at the black stack of something but before my eyes focus my brain redirects to the right.
Time to get a trip to Slovenia...
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Old 26th November 2016, 02:06 PM   #3447
savvas is offline savvas  Greece
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Default grounding and temperature

I wanted to ask which method of grounding is preferred, the one provided by the 1.4 version manual (no additional wire to the ground with the extra diodes/resistor) or the one given in the picture below (IIRC, it's improved version of the 1.2 version)
Click the image to open in full size.

Also, is it 50C idle and 53C while playing music temperature something to worry about ?
Take to account that it's winter and summer is quite warm down here (Greece)

BTW, sounding great, while I've heard better amps in some aspects of overall performance (mainly bass), none comes close to the value for money of this one
...and as for the bass (only lost against a very well regarded amp in this category) I'm going active in some days so it's not a closed case yet
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Old 26th November 2016, 02:21 PM   #3448
Lazy Cat is offline Lazy Cat  Slovenia
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savvas

Use GND lift, complete GND isolation just like it is drawn in v1.4 manual.

Regarding bass, use CapBanks (gorgeous bass) and there will be no amp better than FO M, period.

L.C.
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Old 26th November 2016, 02:40 PM   #3449
savvas is offline savvas  Greece
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thanks for the quick reply,
I assume no heatsink grounding also then (my transistors are isolated by keratherm micas anyway) I have both 1.2 and 1.4 versions.
Is Capbank available in pcb or assembled form ?
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Old 26th November 2016, 07:52 PM   #3450
maxlorenz is offline maxlorenz  Chile
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Having played now with five SMPS I can declare that very decent sound can be obtained from them, provided you increase output capacitance or use a power regulator, like the only one I know and use, the PowerReg, from Teddy Pardo.
I recommend a minimum extra of 10mf per rail per channel (NTC thermistor in series with primaries), better use non-regulated SMPS, and the bigger the better, within reasonable sizes.

I have not used all MFRS, but Connex and Hypex. I can asure that the SMSP800RE from Connex is not bad at all...it lacks DC error sense, though.

It ended a little crowded inside.
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File Type: jpg FO 1.4M extra CAP.JPG (934.8 KB, 352 views)
File Type: jpg FO 1.4M extra CAP2.jpg (1,003.6 KB, 342 views)
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