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Old 11th December 2012, 08:35 AM   #1021
AndrewT is offline AndrewT  Scotland
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Quote:
Originally Posted by nazirdigi View Post
hi apex sir,
for sr800 with c5200 and a1943 outputs how much power can get? and safety voltage for operation? for 4 ohm load?
use the standard Power Guide.
Maximum output power ~ total device Pmax divided by 4 to 6.
For low voltage into a 4ohms speaker use 4 to 5.
5pr of 150W (a1943/c5200), gives Pmax = 1500W. Divide this by 5 to give 300W into 4ohms.

Using 5pr of 250W devices (mj21193/4) with good high voltage SOA, the Pmax = 2500W.
Giving 500W into 8ohms. A very different amplifier resulting from using a very different output device.
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Old 11th December 2012, 03:48 PM   #1022
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thanks for the reply andrew,
in my country mjl numbers are expensive.
if i increase the outputs (10 pairs) can i get 600w into 4 ohm? is it ok for 2 ohm?
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Old 11th December 2012, 04:28 PM   #1023
AndrewT is offline AndrewT  Scotland
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2ohms requires even lower voltage than 4ohms.
This better suits the terrible high voltage SOA of the 1943.

8ohms requires higher voltage, that's where the big problem lies.

But designing for 2ohms requires massive currents.
Can the driver stage and the pre-driver stage manage to source the required currents?
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Old 14th December 2012, 01:29 PM   #1024
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what is the bias current for AX-14

I am using 35-0-35VAC transfoermer
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Old 14th December 2012, 02:06 PM   #1025
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Quote:
Originally Posted by shravanth View Post
what is the bias current for AX-14

I am using 35-0-35VAC transfoermer
Thread about AX14: 100W Ultimate Fidelity Amplifier
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Old 17th December 2012, 12:40 AM   #1026
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Arrow PRINCIPLE

Quote:
Originally Posted by alex mm View Post
...... to layout this rev.3.1 I spend days and hours from my free time , all the time I need Q.C and this is your contribution to find mistakes , errors and let me know and corect my PCB . I'm glad to help DiyAudio comunity with my skil ......
All the best ,Alex.
the first step:
I upload the image there that Realise pcb.: D
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Old 17th December 2012, 12:53 AM   #1027
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Originally Posted by SERGIODS View Post
the first step:
I upload the image there that Realise pcb.: D
Very good...
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Old 17th December 2012, 06:50 AM   #1028
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Originally Posted by SERGIODS View Post
the first step:
I upload the image there that Realise pcb.: D
Nice first step
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Old 19th December 2012, 08:55 AM   #1029
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Mr Mile i have built this softstart, how to get more delay ..about 1 second??
I have increase for capacitor but no effect.

thanks for kindly helps
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Old 19th December 2012, 09:08 AM   #1030
amptech is offline amptech  Scotland
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Hand rich, the r/c timer part of the soft start can be delay via replacing the resistor with a 100k or 220k preset pot and adjust it to say 1 or 2 seconds is plenty.
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