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Old 28th May 2007, 06:12 PM   #1
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Default From Italian PHILIPS ELCOMA (1981)

Hi to all

Many Years ago (1981) in Italy a famous book of Amplifiers was published by PHILIPS - ELCOMA

Click the image to open in full size.

(This is a collection of Application Note published by firm PHILIPS S.p.A. Italia)
http://www.philips.it/

Parts of this Book can be reproduced with condition to quote the Author.
Click the image to open in full size.

The Book start with hybrid IC OM 931 (30W) and OM961 (60W)
and continue with transistor amplifiers up to 100W

Many of these Amps are with single supply, bootstrap cap. and
darlington end stage.
Others amps are with simmetrical supply and CCS without bootstrap.

The only problem is that the end-stage bjt can be out of production... BDX66C BDX67C BDV64A BDV65A
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Old 28th May 2007, 09:00 PM   #2
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Default Va molto benne per qui la reproduzione parcially di schematico fratello


Will be very interesting to have some reproduction of schematic here my friend.

If you can post some....please, go ahead.

Avanti leggionario!

saluti

Carlo
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Old 28th May 2007, 09:08 PM   #3
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Unfortunately, its the only one I own.
Schematics would be nice indeed.

/Hugo
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Old 28th May 2007, 11:19 PM   #4
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Default Re: Va molto benne per qui la reproduzione parcially di schematico fratello

Quote:
Originally posted by destroyer X

Will be very interesting to have some reproduction of schematic here my friend.

If you can post some....please, go ahead.

Avanti leggionario!

saluti

Carlo
Ciao,
Here I am !
I have had to polish up everything schematics.

Quote:
Originally posted by Netlist


Unfortunately, its the only one I own.
Schematics would be nice indeed.

/Hugo
Hi,

Here is the schematics....
This is single supply in three version (25/50/100W 4 Ohms)

Source of Schematics, PCB, PTH :
PHILIPS ELCOMA S.p.A. Piazza IV Novembre 3 - 20124 MILANO
From BOOK "Amplificatori di Bassa frequenza e Hi-Fi"
3rd edition - Jan 1981
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File Type: gif schematics.gif (29.1 KB, 581 views)
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Old 28th May 2007, 11:21 PM   #5
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PART LIST
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Old 28th May 2007, 11:24 PM   #6
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PCB
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Old 28th May 2007, 11:33 PM   #7
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PTH (132KB)

Click the image to open in full size.

direct link:
http://img516.imageshack.us/img516/6715/pthey9.gif
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Old 29th May 2007, 07:11 PM   #8
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This other schematics use a CCS for decoupling the supply
for driver stage.

Click the image to open in full size.
http://img339.imageshack.us/img339/3174/amphschhz4.gif

Click the image to open in full size.
http://img441.imageshack.us/img441/1441/amphpcbvf9.gif
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Old 29th May 2007, 07:39 PM   #9
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Also this is for double supply with bootstrap & CCS

Click the image to open in full size.
http://img70.imageshack.us/img70/1951/amptschpy3.gif


Click the image to open in full size.
http://img69.imageshack.us/img69/8267/amptpcbwm8.gif
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Old 29th May 2007, 07:46 PM   #10
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Default I am enjoying your posts...thank you very much


Veramente bello schematico.

Grazie.

Very good and pretty schematic.

thanks,

Carlos
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