Hi all,
I am planning to build one of Mr. Pass design which is Aleph 2. The main problem that I have is obtaining heatsink for the amp. I am having a very hard time to obtain the heat sink locally (Jakarta, Indonesia), of course, I can always order it from abroad, but it would be very expensive. Luckily, after searching extensively, I found heatsinks that I think will fit for the aleph 2. The size of each heatsink is 200mm Length, 84mm Width and 81.5mm tall. I am planning to put about 6 of it vertically and joint the by L shape alumunium bar for each side of the chassis. THe cover will be brush and anodized aluminum sheet. Will the heatsink be adequate for this amp?
I am planning to build one of Mr. Pass design which is Aleph 2. The main problem that I have is obtaining heatsink for the amp. I am having a very hard time to obtain the heat sink locally (Jakarta, Indonesia), of course, I can always order it from abroad, but it would be very expensive. Luckily, after searching extensively, I found heatsinks that I think will fit for the aleph 2. The size of each heatsink is 200mm Length, 84mm Width and 81.5mm tall. I am planning to put about 6 of it vertically and joint the by L shape alumunium bar for each side of the chassis. THe cover will be brush and anodized aluminum sheet. Will the heatsink be adequate for this amp?
Attachments
You NEED to tell us where you get those and how much!! Is that cut to custom length?
Did you say you're going to use 12 of that for each monoblock?!
Did you say you're going to use 12 of that for each monoblock?!
Heat Sink Source
I bought it locally in Jakarta, Indonesia. It cost $9.50 for each block. Yes, I am planning to use 5 or 6 block for ach side of the chassis for a total of 10 or 12 block for each mono block. I am planning to buy some more after I got some comment from the elder in this forum. 😀 . BTW, how many uF is needed for the PS of EACH monoblock? I just purchased ELNA Audio grade 10000uf 56VDC and wandering if I can use it. Thank you for all the help and comment.
I bought it locally in Jakarta, Indonesia. It cost $9.50 for each block. Yes, I am planning to use 5 or 6 block for ach side of the chassis for a total of 10 or 12 block for each mono block. I am planning to buy some more after I got some comment from the elder in this forum. 😀 . BTW, how many uF is needed for the PS of EACH monoblock? I just purchased ELNA Audio grade 10000uf 56VDC and wandering if I can use it. Thank you for all the help and comment.
Attachments
nelson states that around 100KuF per channel is appropriate. those are NICE caps too from what i understand...
man, i would love to get ahold of some of those heatsinks... any way you could get extras?
man, i would love to get ahold of some of those heatsinks... any way you could get extras?
If it's $9.50 per piece in Indonesian money .... that's may be US$1.00 per piece (I don't really know the conversion rate)? Please check it out for us ... quantity in stock, pricing in US$ & if they can do international shipping. I will definitely buy a batch of them ... even if I don't need it.
Prices
The price quoted is actually in US$. I know that if I buy a huge quantity (a minimum of 20 pcs), the price will come down to $8 a piece. Although, I am not sure if it is economical to get those heatsinks to be shipped abroad such as US, those things are HEAVY. I will weigh it though, and get some quote for the shipping cost. Also, a quick question about transformer, can I get away with 500VA Toroid for each monoblock of the Aleph 2? I know it is very small, can I compensate the with large cap value? ie. 500k uF? Thanks.
The price quoted is actually in US$. I know that if I buy a huge quantity (a minimum of 20 pcs), the price will come down to $8 a piece. Although, I am not sure if it is economical to get those heatsinks to be shipped abroad such as US, those things are HEAVY. I will weigh it though, and get some quote for the shipping cost. Also, a quick question about transformer, can I get away with 500VA Toroid for each monoblock of the Aleph 2? I know it is very small, can I compensate the with large cap value? ie. 500k uF? Thanks.
I would have to say 500VA per monoblock is too small.
Now about those heatsink ... please still check it out ... some of us might still be interested. Thanks.
Now about those heatsink ... please still check it out ... some of us might still be interested. Thanks.
500VA transformer
As somebody said before about my DAC:
It would be a pity to spoil the ship for a halfpenny's worth of tar.
Go at least for 750VA.
As somebody said before about my DAC:
It would be a pity to spoil the ship for a halfpenny's worth of tar.
Go at least for 750VA.
Sizing transformer
I remember somebody on this forum said that the rule of thumb for sizing transformer for Class A amp is as follows:
(Output power per channel) X 7.5 = size of transformer
which for Aleph 2 came up to be 750VA.
Now of course I can't find (search) who said that. So, please don't quote me!
I remember somebody on this forum said that the rule of thumb for sizing transformer for Class A amp is as follows:
(Output power per channel) X 7.5 = size of transformer
which for Aleph 2 came up to be 750VA.
Now of course I can't find (search) who said that. So, please don't quote me!
Hello Tjong,
Sorry this is off the topic, but I too live in Jakarta. Btw, where did you get the IRF mosfet for this monster?
For everybody,
I've seen lots of those heat sink in Indonesia. Btw, how much this kind of heat sink (the one Tjong showed us) in US?
Regards,
Sorry this is off the topic, but I too live in Jakarta. Btw, where did you get the IRF mosfet for this monster?
For everybody,
I've seen lots of those heat sink in Indonesia. Btw, how much this kind of heat sink (the one Tjong showed us) in US?
Regards,
Heatsink Availability
Sianturi, I would be very happy man indeed if you can show me where to get other heatsink for aleph 2 amp. I, too, have seen so many kind of heatsink, albeit, all of them are very small and so "regular." The problem that I got so far it is almost impossible to find a nice BIG heatsink for the amp. When I saw this heat sink, I thought I will joint 6 of them standing vertically to make up for one side of the chassis for a total of 12 for each monoblock. In regard to the mosfet, I got a friend of mine who went to Singapore, and get it from there. If you want to get it, I still have 50 of it left unmatched (IRFP240).
For those who are interested in the heatsink, please look at my previous post regarding the price.
Fcel, I have to go the the store to reconfirm about the availability and, hopefully, lower price for them.
Sianturi, I would be very happy man indeed if you can show me where to get other heatsink for aleph 2 amp. I, too, have seen so many kind of heatsink, albeit, all of them are very small and so "regular." The problem that I got so far it is almost impossible to find a nice BIG heatsink for the amp. When I saw this heat sink, I thought I will joint 6 of them standing vertically to make up for one side of the chassis for a total of 12 for each monoblock. In regard to the mosfet, I got a friend of mine who went to Singapore, and get it from there. If you want to get it, I still have 50 of it left unmatched (IRFP240).
For those who are interested in the heatsink, please look at my previous post regarding the price.
Fcel, I have to go the the store to reconfirm about the availability and, hopefully, lower price for them.
Oops
Hello Tjong,
You're right.... I've just checked my heat sink, it looks VERY similar to the one you show, only, It got the "T" part for attaching TO3 case, and in smaller size.
It looks like this:
\
-|--
/
While yours is like this:
\
-|
/
Btw, I've once checked some local shipping company rates. For Indonesia to US, 4 kg = US$194
up to 45 kg = US$18/kg.
Hope this helps,
Hello Tjong,
You're right.... I've just checked my heat sink, it looks VERY similar to the one you show, only, It got the "T" part for attaching TO3 case, and in smaller size.
It looks like this:
\
-|--
/
While yours is like this:
\
-|
/
Btw, I've once checked some local shipping company rates. For Indonesia to US, 4 kg = US$194
up to 45 kg = US$18/kg.
Hope this helps,
Hi There
I am from Singapore.
Was wondering how heavy are those heat sinks?
I have not started on my Adelph project yet, due to a lack of suitable heatsink.
I might need to ship those stuff over.
Cheers
CH2
I am from Singapore.
Was wondering how heavy are those heat sinks?
I have not started on my Adelph project yet, due to a lack of suitable heatsink.
I might need to ship those stuff over.
Cheers
CH2
Heatsink Availability
I haven't weigh it yet. Just a quick suggestion, you could probably obtain some heatsink from AAVID, they have a rep based in Singapore. You could probably contact them to ask wether they have a distributor there for thei product. In regard to my heat sink, I will inform you later.
I haven't weigh it yet. Just a quick suggestion, you could probably obtain some heatsink from AAVID, they have a rep based in Singapore. You could probably contact them to ask wether they have a distributor there for thei product. In regard to my heat sink, I will inform you later.
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