Bringing this thread back to life, as i dont want to start a new thread on the same topic.
There is a set of kit still left and luckily the set is in my hands right now and working on it to complete its goal.
The set has
2 Nos Amplifier kits (Completely assembled - But needs a make over because the soldering condition is not as per expectations)
2 Nos Cap Multiplier kits (Completely assembled - But needs a make over because the soldering condition is not as per expectations)
I got this kit from Mr. Shailesh and I am helping him out in his built.
Initial work has started with making an enclosure for same. I have selected a massive heat sink (Model No HS 300 x 83)purchased from Akash Enterprise (Pune) with a cut length of 120 mm.
The dimensions of enclosure will be as under.
External : 514 mm (Width [fin end to fin end]) x 300 mm (Depth) x 120 mm (Height)
Internal : 350 mm (Width) x 296 mm (Depth) x 113 mm (Height)
Base plate & top plate is aluminum sheet. Base plate is 4 mm thick & top plate is 2 mm thick. Front & back panels will be of acrylic, as aluminum plates would have gone out of budget due to its machining cost.
Below are some photos with some information on how i built it.
The below 2 photos is of heat sink.
When I received these heat sinks it did not had a perfect size on both ends, hence i had to machine both the heat sinks to make their sizes equal & a perfect right angle with respect to the base where the bottom & top plates will be mounted. Right angle is necessary or else we will end with uneven sizes on all corners & the enclosure may look tilted. Secondly I have made a grove on both top and bottom of heat sink. Bottom groove is 4 mm deep & top groove is 2 mm deep. this will flush mount the top & bottom plates with heat sink.
Below Photo is of Heat sink with bottom plate just kept on the groove to check the fitment. You can see how neat and clean is the fitting.
Below Photo is of Top Cover. It was cut on shearing machine. But it still had a variation of 0.5 mm on both ends. I simply used a router to flush out the extra material to make it a perfect right angle on all corners. The router which i am using has variable speed hence it was easy for me to use this router on aluminum plate. (Please do not try this by yourself if you are not skilled enough to use tools, This is very dangerous process and if anything goes wrong you may hurt yourself. Safety glasses is a must while doing this because of the metal chips). This photo itself is self explanatory on how this process was done. I have used the straight mdf sheet as a guide to slide the router on this plate. Bottom plate was also done the same way.
I lost about 2 mm size of total width to make right angle on all four corners of both plates. This 2 mm size did not matter at this stage because the face plates are yet to be done & I adjusted this 2 mm loss in the width of groove made in heat sink.
Below photo is in process photo while using router. You can see the aluminum chip on plate. This is why safety glasses are necessary. On right it is the excess material removed by router & left the excess material is yet to be removed.
Below 2 photo is of measured dimensions of both ends after flushing the plates.
I am continuing this post in next post as it says the limit is for 10000 characters
Sadik
