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Old 27th August 2012, 05:32 AM   #1
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Default Hybrid amplifier with direct links Breeze 2.

And tried to get rid of this scheme, reactive elements, as far as possible.
The most popular of the developments. Unlike its predecessor - this amp Breeze is easily configurable.
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File Type: jpg Gibrid Breez-2.GIF English 2.JPG (73.5 KB, 437 views)
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Old 27th August 2012, 06:05 AM   #2
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Originally Posted by Svjatoslav View Post
And tried to get rid of this scheme, reactive elements, as far as possible.
The most popular of the developments. Unlike its predecessor - this amp Breeze is easily configurable.
very nice
how about thermal stability? which transistors should be thermal coupled?
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Old 27th August 2012, 06:20 AM   #3
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Stability is very high, due to the inclusion of a cascode output transistors! Current set almost cold transistors on which small voltage drop determined Zener diodes. These diodes regulated / restricted, and the maximum output pulse current. While gently.
One shot killed three hares - cascode switch the order of linear, broadband, far higher thermal stability than a single stage with a common source.
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Old 28th August 2012, 01:49 AM   #4
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interesting design....is it class A? R6 seems to be the offset adjustment and bias as well?
kindly explain further....

tubes must have a mu of 24-40.....so my 6N1p will fit the bill...
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Old 28th August 2012, 09:59 AM   #5
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The output stage of class "AB". Cascode switch enables this mode. Preliminary stages - Class "A"
R6 zero balance control on the amplifier output.
Sometimes it is necessary to fine-tune the balance. To do this, R3 also make the trimming.
R4 sets the quiescent current of the circuit. If the power supply stabilized, then R4 is desirable to replace the generator current.
The scheme is very simple. "The design of the day off."
6N1P hardly applicable. It has a high-voltage and low slope. Fit double triode capable of operating at low plate voltages. Best 6N23P, or its equivalent, with a different pinout 6N24P.
The photo Breeze-2 assembly.
http://devicemusic.ucoz.ru/_fr/0/6745242.jpg

Last edited by Svjatoslav; 28th August 2012 at 10:27 AM.
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Old 29th August 2012, 01:52 AM   #6
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Nice prototype...i got your point....i got 6n6p tube on hand but lowish mu of around 20....will it capable enough of driving the output at full power? how much power does it capable, if I'm not mistaken based on the rail voltage its around 100w at 8 ohms...good enough for my need..

One more thing....thermal runaway... this vertical mosfet needs thermal compensation...in this schema it doesn't have....is there no need for it?
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Old 29th August 2012, 06:35 AM   #7
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Nice prototype...i got your point....i got 6n6p tube on hand but lowish mu of around 20....will it capable enough of driving the output at full power? how much power does it capable, if I'm not mistaken based on the rail voltage its around 100w at 8 ohms...good enough for my need..
Power will be less. But you can start with this tube.
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One more thing....thermal runaway... this vertical mosfet needs thermal compensation...in this schema it doesn't have....is there no need for it?
In this circuit, temperature compensation is required.
Current stability is determined by the output stage transistors included common-source (the first in the course of the output stage). They drop a few volts and dissipates very little power.
Therefore the stability of the high. Plus the effect of thermal stabilization MOSFET. Plus a stabilizing effect R9R10.

Printed circuit board is the original version.
Photos in the collection of one of the options.
Attached Images
File Type: jpg Плата Б*ИЗ-2 вар. 2.jpg (100.0 KB, 345 views)
File Type: jpg Foto platy Breze-2 v sbore s torom.jpg (58.7 KB, 303 views)

Last edited by Svjatoslav; 29th August 2012 at 06:44 AM.
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Old 29th August 2012, 07:44 AM   #8
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Thanks...as i see in your prototype...r9 and r10 needs be a TO-220 type...VT2 and Vt3 will share the same heatsink with 4 output mosfets?

Do you have the Power supply and speaker protection schematics as in the pix...in the pcb..you had already removed the PSU caps...
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Old 29th August 2012, 07:46 AM   #9
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Thanks...as i see in your prototype...r9 and r10 needs be a TO-220 type...VT2 and Vt3 will share the same heatsink with 4 output mosfets?

Do you have the Power supply and speaker protection schematics as in the pix...in the pcb..you had already removed the PSU caps...
I can see rather that VT4,6 need small heatsinks and VT5,7 are on main heatsink...
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Old 29th August 2012, 09:04 AM   #10
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Thanks...as i see in your prototype...r9 and r10 needs be a TO-220 type...VT2 and Vt3 will share the same heatsink with 4 output mosfets?
At the general big radiator should only output transistors VT5VT6. On the radiator is the potential output. Fixing these transistors directly on the radiator. The radiator must be isolated from the housing.
The numbering of the output transistors from the top down.
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Do you have the Power supply and speaker protection schematics as in the pix...in the pcb..you had already removed the PSU caps...
A little unclear about the caps that we have in mind.
The maximum power of the amplifier 120 W at 8 ohms. With the supply voltage + -55 V.

Last edited by Svjatoslav; 29th August 2012 at 09:12 AM.
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