KSA 100 from Jim's Audio on EBAY

[spurlte]

Can anyone tell me where to find the heat sinks used for the MJE15032/MJE15033?

[Krisfr]

Originally Posted by spurlte

Can anyone tell me where to find the heat sinks used for the MJE15032/MJE15033?

Mouser 531102B02500G but do not quote me

[xslavic]

Just use a metal plate ,i would preffer copper+ ceramic paste
and check this
http://www.ebay.com/itm/130690642187...84.m1555.l2649

[Kaplaars]

Hi friends,

@Spurtle; I've made the large heatsink from a TO3 heatsink which I bought at a local DIY radio market. I've cutted that heatsink into two pieces which fits just right (the gold one in the pictures below). I've bought the little heatsinks (for 2SA968 / 2SC2238) from Digikey.

Not much progress from Holland. Very busy period with my study (chemistry). But did some small bits. I've mounted the bridge rectifiers:


Mounted the transformers:




And mounted the two cool tunnels together (ofcourse electrically isolated from each other). The idea is to mount the cool tunnels lateral in the cabinet and to cut two blow holes at each side. This fits perfectly, and the airflow would be OK.



By the way friends, I've bought some aftermarket reproduction ISC 2SA968 / 2SC2238 transistors (not original Toshiba). I have had some bad experiences with ISC so I am thinking of replacing them before even testing the amplifier. I prefer the original Toshiba's, but they are hard to get. Which trannies do you use? Does anybody know someone who sells the real deal?

[xslavic]

Your rectifier is to slow for this Amplifier
find something better get 4 fast diodes instead,its matters you know

[xslavic]

hi,nice configuration for output,i choosed the 2sa1942 2sc5200 so have 8 pnp and 8 npn per pcb

easyer to cheatsink ,why did you choose ksa 100 and not ksa 100 mkII ?

[neychi]

2sa1011/2sc2344 from Sanyo are direct replacement.

@xslavic; this is ksa100mk2 amp

[tangmonster]

Originally Posted by xslavic

Your rectifier is to slow for this Amplifier
find something better get 4 fast diodes instead,its matters you know

Someone must explain this too me one day. Since the the AC input voltage is only 50 or 60hz? How can a bridge be too slow?

[xslavic]

Just Like that

[spurlte]

Originally Posted by Kaplaars

Hi friends,

@Spurtle; I've made the large heatsink from a TO3 heatsink which I bought at a local DIY radio market. I've cutted that heatsink into two pieces which fits just right (the gold one in the pictures below). I've bought the little heatsinks (for 2SA968 / 2SC2238) from Digikey.

Not much progress from Holland. Very busy period with my study (chemistry). But did some small bits. I've mounted the bridge rectifiers:


Mounted the transformers:




And mounted the two cool tunnels together (ofcourse electrically isolated from each other). The idea is to mount the cool tunnels lateral in the cabinet and to cut two blow holes at each side. This fits perfectly, and the airflow would be OK.



By the way friends, I've bought some aftermarket reproduction ISC 2SA968 / 2SC2238 transistors (not original Toshiba). I have had some bad experiences with ISC so I am thinking of replacing them before even testing the amplifier. I prefer the original Toshiba's, but they are hard to get. Which trannies do you use? Does anybody know someone who sells the real deal?

Where did you get the tunnel coolers?