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Old 29th July 2004, 12:35 AM   #1
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Default X Palesha X , one cooperation amplifier, Destroyer X and Palesha

I have the rigth to explore this amplifier, designed 1972, by Mr. Shuzo Yoshida, today near retire, worked at Atsugi Plant. from Sony Corporation
I am the entire responsible related this amplifier, since last month.

This way, as my nature, as my personality and to be correct with my own ideas.

Have this amplifier for you too...you can explore, construct, sale, modified, put your name, erase mine and put under the motorcicle.......forgot that... a joke!

Mr. Palesha had cooperate a lot, and this way, his name is together my X, the magnificent circuit board is one of the cooperation and nice support he gave me long time ago.
India and Brazil is starting negotiations, we will be partners near future Palesha...will send you Bravox speaker contact too.

This amplifier has not the hi frequency quality of new designs, cannot beat AKSA in hi frequencies, and also loose in low end related to purity, and related to precision..... but this one give a very nice and strong bass, more than normal.....it is a bassy amplifier... for the ones likes bass... to subwoofer will be perfect...can be used for wide music....but his value is 7 to 10.... cannot reach John Lidsey Hood.... cannot either stay around... cannot be compared....but make good music, and is strong, cheap and reliable.

And can work with the transistor you have..... have only to obbey basic rules, as voltage, current and the power output..... around 100 watts maximum.....using 8 ohms.

Use with 4 ohms is possible...but he is bad.... real bad... do not like low charge...you can improve it.... why not.

I have the knowledge to increase highs, learn with Mr Hugh Dean, not a secret, one man i respect.....but i cannot show you how to make better highs.... sorry... do it yourself.

This is our forum philosophie... so...move it!

my pleasure to give you all, and show you all....keept it as my gift

regards,

Carlos
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Old 29th July 2004, 12:36 AM   #2
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Default More informations

attached.
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Old 29th July 2004, 12:38 AM   #3
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Default informations more

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Old 29th July 2004, 12:39 AM   #4
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Default Now i will put informs

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Old 29th July 2004, 12:41 AM   #5
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Default Now, one attachment

Open it.
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Old 29th July 2004, 12:48 AM   #6
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Default The smaller emitter resistor is to adjust off set

So, put a trimpot, 1k value in its place to adjust the off set output voltage.... and adjust bias from 25 to 60 miliamperes each rail... the adjustment is made in the resistor in series with the diodes.... substitute this resistor with a 500 ohms trimpot, and adjust bias...not enough bias.... change trimpot to Ik..... re-adjust off set voltage... and check again bias.... they have some relation ...one adjustment make small interference with the other...have to be repeated.....wait to see if something is hot and don't worry...be happy...if explode..... something is wrong in your assemble...i done several amplifiers....no problems..... and you will see that in the board, the output is using darlingtons...because it is the same output idea.
The darlingtons are good too, have some more brigth, but distorts a little bit more too.
Good idea to put resistance in series in plus and minus rails when adjusting to protect....put fuses in rails when finished...and put fuse in output too.

Carlos
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Old 29th July 2004, 12:51 AM   #7
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Default Now a picture

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Old 29th July 2004, 12:52 AM   #8
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Default Now the image will be posted

And attached.
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Old 29th July 2004, 12:55 AM   #9
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Default Maybe the last one.. lets see.

I want to sleep, tired today.

Problems with the board.... ask palesha, i am very busy those times.

Carlos
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Old 29th July 2004, 12:58 AM   #10
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Default Good luck will be not deceptive, can beat Integrated Circuits

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