Wonderful build! Looks great!
Are you going to try swapping out a different amp PCB, like the F4 or Aleph J?
Are you going to try swapping out a different amp PCB, like the F4 or Aleph J?
Very nice jdkJake!
What resistor value did you use for degeneration of the J74?
Are you using the 100 Ohm feedback resistors or the 220 Ohm? More or less gain?
Walter
What resistor value did you use for degeneration of the J74?
Are you using the 100 Ohm feedback resistors or the 220 Ohm? More or less gain?
Walter
Thanks for the kind words.
No plans as of yet, although the Aleph J is mighty tempting. The nice thing with the universal chassis with all the DIY-friendly features is that the options for the future are wide open. For now, I am very, very happy with the F5-based design.
That's the best part of this hobby; always something new to learn and apply. 🙂
I added 5R to the source of the J74. So, a total of 15R on the J74 source and 10R on the K170. The K170 set is matched to 6.5mA and the J74 set matched at 7.3mA
I am using 100R feedback resistors. I did not bump the gain.
No plans as of yet, although the Aleph J is mighty tempting. The nice thing with the universal chassis with all the DIY-friendly features is that the options for the future are wide open. For now, I am very, very happy with the F5-based design.
That's the best part of this hobby; always something new to learn and apply. 🙂
I added 5R to the source of the J74. So, a total of 15R on the J74 source and 10R on the K170. The K170 set is matched to 6.5mA and the J74 set matched at 7.3mA
I am using 100R feedback resistors. I did not bump the gain.
Since the liquid cooled build is disassembled for chassis work, I thought I would share some pics that show the modular nature of the design. Remaining project elements are reservoir/pump rework, relief plug at top of water block, bottom drain, internal fan/motor speed controls and a high temp AC shutoff safety switch. Hopefully that will "Get er Done" 😀
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You're welcome JK...beautiful build and a good home for the mosfets. Our last email exchange was just over a year ago so really a nice, well-planned one. Enjoy!
With your heatsinks you can fire up your F5s even on a hot FL day.
That and a whole lot of UN-planned life events... 😉
Gotta say, it is quite the little space heater at the bias levels I am using. Gonna be great for a typical mild Florida winter. I might never have to use my heat pump again! Hard to believe it might actually be considered somewhat "green" in the proper context.
Thanks again Blues.
Finished my ACA.
They sound very nice for such small 5 Watt amplifiers. I use them at night when the kids are sleeping, to listen at low volumes.
At daytime the F5Tv3 is the one I listen to...😀
ACA has some difficulties controlling the big 4 ohm 10" woofers of my three-way speakers🙂
Walter
They sound very nice for such small 5 Watt amplifiers. I use them at night when the kids are sleeping, to listen at low volumes.
At daytime the F5Tv3 is the one I listen to...😀
ACA has some difficulties controlling the big 4 ohm 10" woofers of my three-way speakers🙂
Walter
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I don't think they will accept small orders, but at least you can find some information about those heat-sinks.
http://www.omar-alluminio.it/EstrattoDissipatoriALTORendimento.pdf
Really nice F6 by the way 🙂
I had my F5 running for about a week in the diyAudio chassis. There's no way I could say anything negative about it besides its secondary function as a radiator. Yesterday, I finished up the Aleph J board swap, dialed it in, and buttoned it up. I've got to say the AJ is a perfect SS amp for an SE tube amp junkie. Here's the F5/Aleph J diyAudio chassis trip:
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Nice! Very nice!
Extremely clean - well done. I love the dongles for swapping the board in-out. A perfect solution.
Please post all your photos in the AJ build guide thread - they are great!
Extremely clean - well done. I love the dongles for swapping the board in-out. A perfect solution.
Please post all your photos in the AJ build guide thread - they are great!
Thanks! I'm still stuck on what to do with that giant blank faceplate. 😕 I've been looking at temperature meters but I have no idea what to look for configuration-wise if I want to do an analog meter.
chassis posts moved to new thread in Vendor's
http://www.diyaudio.com/forums/vendors-bazaar/243723-amp-chassis.html
moderation
http://www.diyaudio.com/forums/vendors-bazaar/243723-amp-chassis.html
moderation
Its very very awesome design, i really appreciate to see it, thank you very much WalterW to inspire me, i really intend to do something like that.
I really wanted to meet you and see your amp and litle bit chat about it if possible.
Thank you again !