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My  PA-1  PRE-AMP
My  PA-1  PRE-AMP
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Old 12th November 2004, 04:23 PM   #1
audio-gd is offline audio-gd  China
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Default My PA-1 PRE-AMP

My PA-1 PRE-AMP is complete ,it's sound us electron tube 12AX7 of RCA .it's cooperate my XA-100 ,the sound is best.


S/N
112DB(input is not load )


Max signal voltage output
19V RMS(THD<0.1%)

frequency width
20HZ-20KHZ(0DB)

5HZ-100KHZ(-1DB)

0-450KHZ(-3DB)

תٶ
Slew rate Etc
65V/uS


THD
-105DB(1VRMS,1KHZ)
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File Type: jpg pa1-3.jpg (78.2 KB, 1086 views)
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Old 12th November 2004, 04:31 PM   #2
audio-gd is offline audio-gd  China
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Default The circuit diagram

The circuit diagram
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File Type: jpg pa1-pi1.jpg (92.9 KB, 1176 views)
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Old 12th November 2004, 04:38 PM   #3
audio-gd is offline audio-gd  China
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Default PA-1 and XA-1

PA-1 and XA-1,the CD player is Marantz CD16,,DAC is my builded TDA1541AS1. Sound box is my design for Scanspeak 8545K and ETON 25SD1
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Old 24th December 2004, 11:28 AM   #4
MIKET is offline MIKET  United States
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Default Tell us more about your speakers

You said.
"Sound box is my design for Scanspeak 8545K and ETON 25SD1"
I would really like to build something similar, could you tell us more about your spaekers?
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Old 24th December 2004, 02:18 PM   #5
audio-gd is offline audio-gd  China
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Default Hi MIKET

My sound box is a two resonance type. This type can let the woof too low .
My English is too bad ,so I can not say more , but I can shoe the blue print , and you can see it .
The file is see in Coreldraw 9.0 edition .
Welcome give me some idea
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Old 24th December 2004, 02:20 PM   #6
audio-gd is offline audio-gd  China
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My sound box is a two resonance type. This type can let the woof too low .
My English is too bad ,so I can not say more , but I can shoe the blue print , and you can see it .
The file is see in Coreldraw 9.0 edition .
Welcome give me some idea
Attached Files
File Type: zip sound box.zip (16.6 KB, 105 views)
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Old 24th December 2004, 02:54 PM   #7
analog_sa is offline analog_sa  Europe
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Quote:
My PA-1 PRE-AMP
Very impressive circuit. I am not a big SS fan but could probably live with your pre.
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Old 27th December 2004, 01:51 PM   #8
audio-gd is offline audio-gd  China
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The sound box's asunder circuit .
It's out off the sound box,and anear the amplifier ,but it must distance the amplifier least 30CM.
In this way , the sound is better.
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File Type: gif asunder circuit .gif (7.9 KB, 539 views)
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Old 29th December 2004, 12:29 PM   #9
destroyer X is offline destroyer X  Brazil
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Default Very good Audio-GD, put all good thing here...very good...more!

Very good...put more and more... i will be waiting for you.

very good.

thanks

Carlos
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Old 29th December 2004, 02:42 PM   #10
jacco vermeulen is offline jacco vermeulen  Netherlands
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Audio-GD,

are you going to add an English page to your homepage in the future ?
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