Sorry Buzz, but I wasn't quite clear on what J2 was. Is this the amp project the picture represents.
Folks:
F5T V3 monoblocks, which were completed this morning. diyAudio store 5U enclosures, soft start, speaker protection and F5T boards (v2.2), 1kw SumR toroids (32 V secondaries), Nichicon KG caps, etc. Four pairs of MOSFETs per amp. The amps are biased at around .7 amps per MOSFET and I can comfortably hold my hand against the heatsinks for 10 seconds, so in time I may grow more fearless. Kudos and tremendous appreciation to Nelson Pass and much, much gratitude to Buzzforb, without whose help I'd be completely lost in the weeds. Thanks as well to UKToecutter, Zen Mod, Sir Byrd and petefrontiers, who all helped me debug an issue with the first monoblock.
These puppies sound really, really good right off the bench -- what'll they sound like when they've had a chance to settle down? One minor concern is some noise from one of the toroids; I trust it'll calm down over time.
The last photo is of my basement listening room. Those with really, really good eyes will spot a photo of me sitting next to Nelson at a dinner a couple of years back -- a cherished moment. Between the F5T monoblocks and my Egglestonworks Andras sit a pair of Pass Labs Aleph 1.2 amps. I've loved those amps for the past 13 years or so and until Nelson released his F5T article, I thought they'd be mine forever. So double the kudos to Mr. Pass!
Regards,
Scott
F5T V3 monoblocks, which were completed this morning. diyAudio store 5U enclosures, soft start, speaker protection and F5T boards (v2.2), 1kw SumR toroids (32 V secondaries), Nichicon KG caps, etc. Four pairs of MOSFETs per amp. The amps are biased at around .7 amps per MOSFET and I can comfortably hold my hand against the heatsinks for 10 seconds, so in time I may grow more fearless. Kudos and tremendous appreciation to Nelson Pass and much, much gratitude to Buzzforb, without whose help I'd be completely lost in the weeds. Thanks as well to UKToecutter, Zen Mod, Sir Byrd and petefrontiers, who all helped me debug an issue with the first monoblock.
These puppies sound really, really good right off the bench -- what'll they sound like when they've had a chance to settle down? One minor concern is some noise from one of the toroids; I trust it'll calm down over time.
The last photo is of my basement listening room. Those with really, really good eyes will spot a photo of me sitting next to Nelson at a dinner a couple of years back -- a cherished moment. Between the F5T monoblocks and my Egglestonworks Andras sit a pair of Pass Labs Aleph 1.2 amps. I've loved those amps for the past 13 years or so and until Nelson released his F5T article, I thought they'd be mine forever. So double the kudos to Mr. Pass!
Regards,
Scott
Attachments
Clarkstuff: Nice heat sinks!
Removes ALL the ripple?! Can you put a mV number on the PS rail ripple?
Buzz,
Very nice wood work
!! Look like you finished the front panel piece (looked real smooth and shiny).Regards,
Scott,
Great job!! The amps look really nice! Your work inspire me to start on the project (I have the V3 kit from Buzz too) even though I do not have all the parts yet. I might contact you when I ran into problem 😉.
Regards,
Last edited by a moderator:
Tadaaa....
Hi,
today I want to post the result of my F5T V.2.
Here some details:
Dual Mono Setup: 2 x 800VA toroidals from Toroidy + 2 x 176kuF Elko Capacity from Mundorf
I biased the amp at 2.35A per channel using a pair of 680mOhm source resistors at a voltage drop of ~400mV
Temperature is in the range of 53-55 degree
Offset DC: ~5mV
The housing I'm using is the very large one from Hifi2000.it it is similar to the one you can buy at the diyAudio shop but has a depth of 500mm instead of only 400mm
As you can see I also spent a decent front plate made of plexiglass. I needed to do so because I always want to have a look at the nice toroidals 😀
And here are the pictures:
Hi,
today I want to post the result of my F5T V.2.
Here some details:
Dual Mono Setup: 2 x 800VA toroidals from Toroidy + 2 x 176kuF Elko Capacity from Mundorf
I biased the amp at 2.35A per channel using a pair of 680mOhm source resistors at a voltage drop of ~400mV
Temperature is in the range of 53-55 degree
Offset DC: ~5mV
The housing I'm using is the very large one from Hifi2000.it it is similar to the one you can buy at the diyAudio shop but has a depth of 500mm instead of only 400mm
As you can see I also spent a decent front plate made of plexiglass. I needed to do so because I always want to have a look at the nice toroidals 😀
And here are the pictures:
Attachments
Very nice Mallard!
What's you rail voltage? 32V?
Do the trafos hum? I love the way they look.
I used Amplimos which gave a humming amp, though problem is solved now...
Walter
What's you rail voltage? 32V?
Do the trafos hum? I love the way they look.
I used Amplimos which gave a humming amp, though problem is solved now...
Walter
Mallard, I'm always interested in the speaker match up with Pass style amps. What flavor are those - appear to be full range from photo.
Hi Mallard
That one good example of one well made diy amplifier😀
All quality components and with Toroidy and plexy nice touch orginality.
Congrats and thanks for share .
Build more You have talent !
