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Old 6th May 2012, 06:14 AM   #21
spurlte is offline spurlte  United States
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Can anyone tell me where to find the heat sinks used for the MJE15032/MJE15033?
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Old 6th May 2012, 03:02 PM   #22
Krisfr is offline Krisfr  United States
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Quote:
Originally Posted by spurlte View Post
Can anyone tell me where to find the heat sinks used for the MJE15032/MJE15033?

Mouser 531102B02500G but do not quote me
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Old 6th May 2012, 05:15 PM   #23
xslavic is offline xslavic  Moldova
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Just use a metal plate ,i would preffer copper+ ceramic paste
and check this
http://www.ebay.com/itm/130690642187...84.m1555.l2649

Last edited by xslavic; 6th May 2012 at 05:16 PM. Reason: Update
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Old 8th May 2012, 09:38 PM   #24
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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:
Click the image to open in full size.

Mounted the transformers:
Click the image to open in full size.

Click the image to open in full size.

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.

Click the image to open in full size.

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?
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Old 9th May 2012, 09:50 AM   #25
xslavic is offline xslavic  Moldova
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Default Hi

Your rectifier is to slow for this Amplifier
find something better get 4 fast diodes instead,its matters you know
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Old 9th May 2012, 09:57 AM   #26
xslavic is offline xslavic  Moldova
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Default ksa 100 output transistors

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 ?
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Old 9th May 2012, 10:37 AM   #27
neychi is offline neychi  Croatia
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2sa1011/2sc2344 from Sanyo are direct replacement.

@xslavic; this is ksa100mk2 amp
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Old 9th May 2012, 11:03 AM   #28
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Quote:
Originally Posted by xslavic View Post
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?
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Old 9th May 2012, 11:05 AM   #29
xslavic is offline xslavic  Moldova
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Just Like that
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Old 9th May 2012, 12:08 PM   #30
spurlte is offline spurlte  United States
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Default tunnels heat sinks

Quote:
Originally Posted by Kaplaars View Post
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:
Click the image to open in full size.

Mounted the transformers:
Click the image to open in full size.

Click the image to open in full size.

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.

Click the image to open in full size.

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?
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