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Old 22nd May 2011, 11:42 PM   #1831
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Thanks! Very clever approach to save space.
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Old 23rd May 2011, 01:56 PM   #1832
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APEX SR200 made by 'macd'
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Old 23rd May 2011, 02:01 PM   #1833
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Quote:
Originally Posted by alex mm View Post
..... pictures at request ...
Maybe some guys will advice you to invert downwards the L-shaped alluminum adapter, so to better dissipate heat through the large heatsink.
Is that a dual-winding transformer?
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Old 24th May 2011, 02:42 AM   #1834
wmincy is offline wmincy  Malaysia
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alex, wow, neat design!!
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Old 24th May 2011, 12:18 PM   #1835
AndrewT is offline AndrewT  Scotland
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Quote:
Originally Posted by smartx21 View Post
Maybe some guys will advice you to invert downwards the L-shaped alluminum adapter, so to better dissipate heat through the large heatsink.
very definitely.
There are two advanatges to inverting the L angle.
1.) the heat transfer interface is moved down towards the optimum height for heat dissipation (~ 40% up from the bottom)

2.) The output devices can be mounted much closer to the heatsink, significantly reducing the thermal resistance of the thin horizontal leg of the L.

There is a small advantage to mounting the To3s on the outside of the L. The inside face will be non-flat and extremely difficult to be corrected to flat. The outside face of the L is also likely to be non-flat but these faces can much more easily be corrected to flat, or at least flat enough.
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Last edited by AndrewT; 24th May 2011 at 12:21 PM.
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Old 29th May 2011, 09:28 AM   #1836
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Here's my Borbely 894/211 Clone.

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and my Pumpkin / Shuntky

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all being built to compliment what will be a DIY-PASS F4

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Andy

Last edited by Andy5112405; 29th May 2011 at 09:31 AM.
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Old 29th May 2011, 05:11 PM   #1837
jleaman is offline jleaman  Belgium
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Andy
airplane or heli radio box in the background
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Old 30th May 2011, 03:50 PM   #1838
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Old 31st May 2011, 07:54 AM   #1839
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Might as well throw the pictures in here as well.

This is my first prototype of a headphone amp, only one channel atm. Still learning the ropes of solid state. Amp does work fine after all the kinks were worked out.

Running only 2n3904/2n3906 and MJE3055/MJE2955. Will try other alternatives in the next version.

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Kolbjørn
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Old 31st May 2011, 08:47 AM   #1840
Mooly is offline Mooly  United Kingdom
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Thats good... did you use Diptrace to do the PCB by any chance ?

Very neat
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