Burning Amplifier BA-2

[Melon Head]

I wasn't specifically picking on mechanics, I've met more pathetic doctors than mechanics.

In Australia tradesman/craftsman earn more money than people with PhD's.
Specifically Plumbers, and Electricians.

[Melon Head]

I don't recall Nelson publishing a speaker protection circuit in any of his firstwatt or BA articles, so obviously Nelson thinks we are all of the rare breed type.

[Melon Head]

Originally Posted by Zen Mod

edit:

care ..... is in root of everything ;

http://www.diyaudio.rs/blog/6/entry-...e-maintenance/

Hi Zen
The link does not appear to be working correctly.
I like your webpage by the way. When will it be finished?

[jacco vermeulen]

Originally Posted by Melon Head

The problem with the analogy is, how do you know if you are mechanic or a fool?

With Charles Bronson a goner, you'd have to ask Jason Statham these days.

Originally Posted by Itsmee

7.2A per bank

Hooowl (think wolf)

[Melon Head]

Now Charles Bronson was one cool dude.

[Melon Head]

Sorry jacco I am one of those weird people.
I just got to fully explain why I don't like the ananlogy.

A car without brakes is seriously hampered. There is no way you could win a british touring car race without brakes. Races are often won depending on the condition/performance of the brakes.
On a car, brakes affect the performance of the car as much as they are used for safety.
I'm not sure I could say the same thing about a speaker protection circuit, which is purely for protecting the speaker. It is basically never being used unless there is something fundamentally wrong with the amp which trips it into action.
However while driving a car the brakes are used just as much as the accelerator pedal in the process of driving.

I would probably also say that the mechanic who drove the car without brakes was also a fool. I know what it is like to drive a Truck with a heavy load without brakes and I don't recommend the experience to anyone.

With speaker protection circuitry I am quite happy not to use it, as are many other people. If you asked the same group of people or any group of people whether they would be happy to drive a car on public roads without brakes, I don't think you would be finding too many happy people.

I think that covers it without rambling on too much.

Just so there is no confusion. I have no problem with speaker protection circuits. It is basically a personal choice, and I choose not to use them.

[Melon Head]

Originally Posted by Itsmee

Was planning on a 6 deep output, 1.2A per device, 7.2A per bank, 14.4A total (mono), that should drive 2 Ohms quite happily, my speakers are 3 Ohm.

The output stage PSU will be 1KVA 2x18V transformer, 6x100,000uF Kendeil capacitors CRCC.

Two 400mm lengths of these heatsinks should do for a mono amp.

Heatsinks: 9000 Series - 9740HS

Thats a burning amp

Now that's what I call an amp.
I would be using bigger transformers though, 1.5kVa per channel minimum. Since you have gone past the point of no return you may as well make them 3kVA per channel.
This is one serious amp. I reckon it might just wipe the floor with nearly anything at the BA festival. I hope you go ahead with it.

[Melon Head]

I'm a little bit worried you may not effectively dissipate 700W with those heatsinks.
You should easily do 600W though.
You will find out when you get them.
Go go go gooooooo.

[h_a]

1.2A per device

Now that's a beast of an amp; that power dissipation per fet is not for the faint of heart

Looking forward to see pictures! Hannes

[Zen Mod]

Originally Posted by Melon Head

Hi Zen
The link does not appear to be working correctly.
I like your webpage by the way. When will it be finished?

it works , certainly

btw. that is just my blog on Baby DiyA

my web page will be finished ........ who cares ..... probably never .