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diyAB Amp  The "Honey Badger" build thread
diyAB Amp  The "Honey Badger" build thread
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Old 9th June 2019, 12:47 PM   #3551
Harry3 is offline Harry3  Australia
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Why do you need to use that bracket on top of the transformer?
It *might* create a shorted turn in the transformer.
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Old 9th June 2019, 08:43 PM   #3552
stuartmp is offline stuartmp  Australia
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Quote:
Originally Posted by AudioSan View Post
Okei. so no contact between the bolt, transformer disk and bracket?
No contact with the disk either, that's why the insulating bush is longer so it passes through the disk as well.
The reason for the top mount is.
I was a little short on space in my case so I lifted the transformer up a bit to give me room for my IEC plug.

It sits on top of the black plastic block.

The top bracket prevents any vibrations in the transformer as it holds it more securely.

There is also a welded in threaded bush in the bottom of the case so I don't have to worry about holding a nut while I tighten the through bolt.1560112698665.jpg1560112737320.jpg1560112778149.jpg
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Old 10th June 2019, 03:58 AM   #3553
HatlessChimp is offline HatlessChimp
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Quote:
Originally Posted by stuartmp View Post
No contact with the disk either, that's why the insulating bush is longer so it passes through the disk as well.
The reason for the top mount is.
I was a little short on space in my case so I lifted the transformer up a bit to give me room for my IEC plug.

It sits on top of the black plastic block.

The top bracket prevents any vibrations in the transformer as it holds it more securely.

There is also a welded in threaded bush in the bottom of the case so I don't have to worry about holding a nut while I tighten the through bolt.Attachment 761921Attachment 761922Attachment 761923
You are out of control Stuart!
It looks beautiful and well thought out. You will have a lot of spare time when you finish it. diyAB Amp  The "Honey Badger" build thread
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Old 13th June 2019, 03:50 PM   #3554
tesla005 is offline tesla005  Greece
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Join Date: Aug 2017
Question Question on heatsinking

Hi. I am planning to build the honey badger amplifier and I would like to know whether this heat sink would be able to dissipate enough power to keep the transistors cool or not.
Heatsink extruded, grilled, L 150mm, W 262mm, H 60mm, aluminium - 27.44 EUR : acdcshop.gr - Online shopping
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Old 13th June 2019, 09:16 PM   #3555
AudioSan is offline AudioSan  Norway
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that would be more than enough. i'm planning on a 160x300mm and 30mm high pr channel for my 5 ch honeybadger amp
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Old 13th June 2019, 09:19 PM   #3556
tesla005 is offline tesla005  Greece
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Also, one more question: is it worth creating a dual mono arrangement or is it better to supply power to both channels with a common power supply?
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Old 13th June 2019, 09:27 PM   #3557
jwilhelm is offline jwilhelm  Canada
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Most amps will have a better "stereo image" with separate supplies for each channel. No cross talk between channels.
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Old 13th June 2019, 09:33 PM   #3558
tesla005 is offline tesla005  Greece
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Would it be better to have 2 separate transformers or one transformer with 4 secondaries (2 for the left and 2 for the right channel). They are both dual mono since each channel is isolated from the other, aren't they? Also, in the build guide it states that the recommended filtering capacitance per rail is 40000uf. If I decide to use dual mono arrangement, would 20000uF or 30000uf per rail for each channel be enough?
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Old 13th June 2019, 09:46 PM   #3559
jwilhelm is offline jwilhelm  Canada
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Both would basically be the same. I find dual transformers easier to fit in a chassis due to the smaller diameter.

Randy Slone's rule of thumb was 10000uF / rail / 100W output power. 20000uF per rail is pretty standard for this power level.
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Old 13th June 2019, 09:47 PM   #3560
tesla005 is offline tesla005  Greece
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And about the filtering capacitance?
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