A40 weight
Just weighed the amps and the are just under 2 stone, almost 28 pounds each.
Just weighed the amps and the are just under 2 stone, almost 28 pounds each.
Looking At It : Why one wuld want air currents inside the case and get offsets going bananas ?
Why not 2 groups 4 small fans 30 or 40 mm diameter fitted outside just under or abowe the heat sink fins?
Litle fans used as PC memory coolers will fit nicely and 4 in series on each bank can be powered by suply rails at 1/2 nominal voltagge and be prety silent + eficency of sinks is going way way up.
You end up taking heath out of a much larger surface area instead of cooling down what look like a brick.
And you can use litle spare F5 thermistor and a pot to make potential devider to feed gate voltagge to spare F5 mosfet as temperature go up fans spin faster this way your amp get to working temperature prety quick and stay there both in Winter and Summer.
You got spare bit in the part box neh?
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Finally ist done my Aleph P Clone has moved into a new enclosure.
I`ve used a LSQR3 for Volume Control & Input selection.
Layouts for board are from RSTaudio
Sounds fine & replaces my B1 Clone
For driving a F5 Clone i think its a better decision.
Now B1 is Pre for a SYMASYM
Many thanks to GENERIC and ZEN MOD who helped me with a little
hum troubleshooting
(now i use 221Ohm resitors at input so souce can`t look directly at the zeners at the input what removed hum complete.
I had the same problem with the Bosoz when let the 221Ohm resitor out at input
I only wondering how this is solved at orgin Aleph P
....hmm ...who knows maybe
? for me problem is solved)
Many thanks to Mr. Pass for publishing this circut.
I`ve used a LSQR3 for Volume Control & Input selection.
Layouts for board are from RSTaudio
Sounds fine & replaces my B1 Clone
For driving a F5 Clone i think its a better decision.
Now B1 is Pre for a SYMASYM
Many thanks to GENERIC and ZEN MOD who helped me with a little
hum troubleshooting
(now i use 221Ohm resitors at input so souce can`t look directly at the zeners at the input what removed hum complete.
I had the same problem with the Bosoz when let the 221Ohm resitor out at input
I only wondering how this is solved at orgin Aleph P
....hmm ...who knows maybe
? for me problem is solved) Many thanks to Mr. Pass for publishing this circut.
Attachments
Mine arent either, I cant see straight 6500 watts does it to you, my house can't handle it. Nice work... aleph3 dc turbo yeah baby!!!! I really hope it can be done...Very nice, just not children compatible, like my Mezmerize robot
DCB1, F5, F5T V1 & 1/2 D1?
Dear friends
My name is Kostas A. Vazakas from Greece and I'm sending a few pics of my latest diy audio from N. Pass projects.
At first my DCB1 build on my old ALEPH's L motherboard and enclosure, https://www.passdiy.com/gallery/projects/70/kostas-a with two 12v/2.2 Ah batteries, and working fine from the end of 2010.
I think that I'll never change it because it is very natural, but without gain.
This was a problem with my ,also diy F5,because I couldn't listen music at higher levels.
My F5 clone has a common PSU with 500 VA transformer and 176 mF total capacitance, and a pair of 2SK1530,2SJ201 per channel.It was constructed before a year ago.
It is sounding better with my main speakers (SEAS W18NX001 & millenium tweeter) than my old DIY ALEPH 30, with more stereo imaging, detailed sound and better low and high freqs. But with the ribbon speakers (SS 18W8531G00 & Fountek JP3) ALEPH 30 is more musical and with more relaxing sound. F5 is a little bright at high frequencies with my ribbon tweeters.
But three months ago I finished my new F5 Turbo V1, with two pairs of 2SJ201,2SK1530 per channel and two separate PSUs with 500 VA (2x25V AC) and 154mF capacitance per channel.This amp is builded in my old diy ALEPH 5 mono enclosure. The problem is that the temperature is rising to 59-60 Celcius with 20 C room temp at 0.7 A per device.It's a heater for the winter.
My next step will be to use one channel per one enclosure of my old Aleph 5.
The sound is perfect, more powerfull and I don't need a gain preamp any more for my room.
My CDplayer is a DIY PRO2 and the dac is a DIY also, 2xTDA1541a with the D1 unbalanced I/V output, both of them are working hard for many years.
Dear Nelson thank you again for sharing your knowledge with the diyaudio community.
Dear friends
My name is Kostas A. Vazakas from Greece and I'm sending a few pics of my latest diy audio from N. Pass projects.
At first my DCB1 build on my old ALEPH's L motherboard and enclosure, https://www.passdiy.com/gallery/projects/70/kostas-a with two 12v/2.2 Ah batteries, and working fine from the end of 2010.
I think that I'll never change it because it is very natural, but without gain.
This was a problem with my ,also diy F5,because I couldn't listen music at higher levels.
My F5 clone has a common PSU with 500 VA transformer and 176 mF total capacitance, and a pair of 2SK1530,2SJ201 per channel.It was constructed before a year ago.
It is sounding better with my main speakers (SEAS W18NX001 & millenium tweeter) than my old DIY ALEPH 30, with more stereo imaging, detailed sound and better low and high freqs. But with the ribbon speakers (SS 18W8531G00 & Fountek JP3) ALEPH 30 is more musical and with more relaxing sound. F5 is a little bright at high frequencies with my ribbon tweeters.
But three months ago I finished my new F5 Turbo V1, with two pairs of 2SJ201,2SK1530 per channel and two separate PSUs with 500 VA (2x25V AC) and 154mF capacitance per channel.This amp is builded in my old diy ALEPH 5 mono enclosure. The problem is that the temperature is rising to 59-60 Celcius with 20 C room temp at 0.7 A per device.It's a heater for the winter.
My next step will be to use one channel per one enclosure of my old Aleph 5.
The sound is perfect, more powerfull and I don't need a gain preamp any more for my room.
My CDplayer is a DIY PRO2 and the dac is a DIY also, 2xTDA1541a with the D1 unbalanced I/V output, both of them are working hard for many years.
Dear Nelson thank you again for sharing your knowledge with the diyaudio community.
Attachments
The latest version of a liquid cooled chassis for Pass and other "WARM" amps is almost complete.
For a pictorial build thread please use the following link. Please consider this a prototype that can be scaled up or down to cool anything from the tiny ACA to the biggest "House Heater"
Comment and suggestions welcomed. Hope you enjoy the approach
BLAT-3
(Some trim and fit still to come!)
For a pictorial build thread please use the following link. Please consider this a prototype that can be scaled up or down to cool anything from the tiny ACA to the biggest "House Heater"
Comment and suggestions welcomed. Hope you enjoy the approach
BLAT-3
(Some trim and fit still to come!)
Attachments
Hello Bcmbob
how much dissipation with this fan/radiator. enough for a turbo V3 ??
how much dissipation with this fan/radiator. enough for a turbo V3 ??
The latest version of a liquid cooled chassis for Pass and other "WARM" amps is almost complete.
For a pictorial build thread please use the following link. Please consider this a prototype that can be scaled up or down to cool anything from the tiny ACA to the biggest "House Heater"
Comment and suggestions welcomed. Hope you enjoy the approach
BLAT-3
(Some trim and fit still to come!)