Pass DIY Addict
Joined 2000
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Very nice, Ken! I didn't realize what type of wood you had used when I first saw your amp. Do the wood panels have any negative impact on the air flow through the sinks? This is an interesting approach to dress up the amp! I've also enjoyed the handful of amps that people have shown with sinks mounted on the inside of the chassis. Both are a little different than the norm.
Eric
Eric--No. In fact, the wood panels are an integral part of my heatsink cooling system. I have two muffin fans on the rear panel of the amp, that flow air into the central part of the chassis. From there, the air flows under the heatsinks (machined, for that purpose), and then the air flows upwards between the heatsink fins and wood panels. The air exits at the top. As such, I have both forced air (fans) and thermal convection (from the effect of a "thermal chimney" of the fins and wood panels). Works great.
I suspect the amp would run a lot warmer without the wood panels--would ruin the desired air flow path thru the amp.
CanAm Man's amp probably has enough excess cooling he could run a hot F5T in it with little worry - I have had the honor of seeing it in person, it's one of those DIY projects that makes you want to aspir to that level of quality and detail.
Also, the panel meters are amongst the coolest things ever. 🙂
Also, the panel meters are amongst the coolest things ever. 🙂
Finally ready!
Here are the latest pictures of my completed F5Turbo v2 with cascoding, with 2sj201/2sk1530 output MOSFETs and the diodes MUR3020W mounted on the heatsinks. I'm not a ''fraidy-cat" 😉 but hey, my sourceresistors are only 0.22 Ohm...
The frontpanel is wonderful made by Andrea of hifi2000.
The MOSFETs are biased at 1.25 A each at 33.2 volts so 40 Watts each.
Total power consumption is around 350 Watt, with max temp on the heatsinks of 52.3 degrees Celsius.
I first biased it around 380 Watt put the lid on the amp and I almost had a thermal meltdown 😀
Took me hundreds of hours to complete....
Hope you like the pictures...
Here are the latest pictures of my completed F5Turbo v2 with cascoding, with 2sj201/2sk1530 output MOSFETs and the diodes MUR3020W mounted on the heatsinks. I'm not a ''fraidy-cat" 😉 but hey, my sourceresistors are only 0.22 Ohm...
The frontpanel is wonderful made by Andrea of hifi2000.
The MOSFETs are biased at 1.25 A each at 33.2 volts so 40 Watts each.
Total power consumption is around 350 Watt, with max temp on the heatsinks of 52.3 degrees Celsius.
I first biased it around 380 Watt put the lid on the amp and I almost had a thermal meltdown 😀
Took me hundreds of hours to complete....
Hope you like the pictures...
Attachments
Fugly!
put 5mm spacers between heatsinks and both bottom and top plate , to have opening all around circumference ; that way it will have more air for inside cooling
put 5mm spacers between heatsinks and both bottom and top plate , to have opening all around circumference ; that way it will have more air for inside cooling
help..I can't breathe..it's hot...and tight...man, that thing will be boiling hot like a vulcano 😀
Thanks!
Ofcourse thanks to Papa Pass for this wonderful design and sharing it with the DIYaudio community!
The first music I listened to was a SACD from the Dire Straits, Brothers in Arms...your latest trick...WOW
Ofcourse thanks to Papa Pass for this wonderful design and sharing it with the DIYaudio community!
The first music I listened to was a SACD from the Dire Straits, Brothers in Arms...your latest trick...WOW
Hi ZM, I think that's a good idea, cause the components inside are measured around 45 degrees Celsius... 😀
Great build WaterW!
Mounting power supply including caps on heatsink just above amp board, how good is this?
Mounting power supply including caps on heatsink just above amp board, how good is this?
It's not my idea, I saw it in the F5X thread from EUVL.
I liked it cause you have very short wires, low induction, low resistance from your PSU to your AMPboard.
And... I had almost no place left in the case, because of the big transformers. 😀
Downside is the caps are getting pretty hot, around 45degrees Celsius.
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Pass DIY Addict
Joined 2000
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Wow, Walter! That is an AMAZING build! Clearly hundreds of hours to plan and execute! Very nicely done!