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F6 Illustrated Build Guide
F6 Illustrated Build Guide
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Old 22nd May 2018, 12:11 PM   #1151
silasmellor is offline silasmellor  Denmark
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F6 Illustrated Build Guide
Thanks for the reply Fabrice, may i ask what are the inductors you're using, and where did you source them?
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Old 22nd May 2018, 01:39 PM   #1152
fabrice63 is offline fabrice63  France
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Inductors are Mundorf L125 , these are air core but I gave them an iron core to raise the Henry's ( better for ripple reduction ) , and it worked good , stock value is 3.3 mH , with the core is goes up to 10 mH approx , and they are far from saturation .

.
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Old 22nd May 2018, 02:13 PM   #1153
silasmellor is offline silasmellor  Denmark
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Ok, i got the values right in PSUD2 now, had missed the "mili" prefix Looks like a nice PSU, but wowee, expensive compared to CRC...
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Old 22nd May 2018, 02:20 PM   #1154
fabrice63 is offline fabrice63  France
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it's a bit more expensive , but this amp really deserve that kind of PSU

an firts class power supply for an first class amp

.
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Old 22nd May 2018, 05:07 PM   #1155
silasmellor is offline silasmellor  Denmark
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F6 Illustrated Build Guide
As much as i agree with you that this is a quality amp, i am unfortunately not flush enough to provide it with such a premium supply! However, i find that using 4x33mF (per rail) caps in the DIYAS PSU with 4x1.88R (0.47R) should give below 20mV ripple and keep the voltage above 22V. Practical question: The power dissipation across those four parallel resistors is approx 3.5-4W (assuming 3A draw). Is it still safe to use 3W resistors (since they share the load), or should i go to 5W or higher?
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Old 22nd May 2018, 05:33 PM   #1156
fabrice63 is offline fabrice63  France
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four 3 w resistor in parallel can handel 12 w , with 3 A load , each of them will "see" 0.75 A and "eat" about 1.7 v , so 3 w is well rated ,I think .

but 5 w wont harm , anyway

.

Last edited by fabrice63; 22nd May 2018 at 05:44 PM.
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Old 22nd May 2018, 06:22 PM   #1157
silasmellor is offline silasmellor  Denmark
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Great, thanks Fabrice! In the future when i'm flush i will build a "proper" CLC psu for the amp
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Old 18th June 2018, 11:58 AM   #1158
powerslave is offline powerslave  India
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I tried my best to read this thread before asking questions however did not find it on F6's owner's manual too i.e. what is the power consumption when it's on idle (assuming one build's it as per guidelines and with same bias figures as illustrated on the 1st page) ? Secondly how long does one need to keep this amp on before playing music or if there is even any such thing with this amplifier ? I ask these because I wish to build something which I will use on a daily basis and should be able to use in weather conditions here in India without having to worry about AC or room temperature control etc.
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Old 18th June 2018, 05:28 PM   #1159
Bare is offline Bare  Canada
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Was concerned with all the Warm up talk too.
Welll... I'm lazy and just as often I turn it and enjoy.
Stone cold it still sounds better than ANY amp I've ever owned (been at this audio sillyness since '68)
Sometimes i will turn it on then come back a half hour later to listen.
Truth is the differences (yes there are some.. are Subtle tbh ) as in I find it far more enjoyable to warm it in use rather than waiting for it's best possible sounds
PS; the heatsinks don't seem to get more than barely warm.
Mine is a Poor room heater

Last edited by Bare; 18th June 2018 at 05:32 PM.
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Old 18th June 2018, 06:29 PM   #1160
silasmellor is offline silasmellor  Denmark
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If you dont bias too hot it should be fine (depending on chassis of course). I also rarely let mine warm up, and have not had the feeling anything is lost because of it. It only takes 20-30 mins or so before it will be warm anyways, so that time is quickly spent if the music is good, like Bare said


http://www.firstwatt.com/pdf/prod_f6_man.pdf


States 180W power draw.
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