Motorola Power Amplifier

zerohead_ak47 · 3rd May 2007, 07:55 PM

sakis · 3rd May 2007, 08:22 PM

i thing that with somany out devices and 52 volts per rail will produce a hell of a lot more than 100w

zerohead_ak47 · 3rd May 2007, 08:33 PM

Quote:

Originally posted by sakis
i thing that with somany out devices and 52 volts per rail will produce a hell of a lot more than 100w

its motorola culculation

zerohead_ak47 · 3rd May 2007, 08:46 PM

MikeBettinger · 4th May 2007, 12:55 AM

Designed by Andy Hefley of Great American Sound co. (GAS) , there was also another application note from this series that was essentually an updated Ampzilla design.

Mike

djk · 4th May 2007, 03:34 AM

"i thing that with somany out devices and 52 volts per rail will produce a hell of a lot more than 100w"

If you used a fully regulated power supply it would.

The Adcom GFA 535 was only rated at 60W/8R with +/- 52V.

gearheaddruid · 4th May 2007, 04:12 AM

I thought that design looked familiar. 52 volt rails should give you close to 100w into 8ohms. Looks like a good project for a p.c. board layout. Would be an easy build for newbies.

jacco vermeulen · 4th May 2007, 08:14 AM

If i had not seen my agenda calendar lately this would have been a nice April fool schematic.
Whoever exchanged the output stage must have transplanted a Vette LS6 engine in his 80s Buick Century stationwagon as well.

Tube_Dude · 4th May 2007, 06:10 PM

This design embodies the low feedback school , with the VAS stage severely loaded by two 2K7 resistors to ground...

It's not a very low distortion amp...

stahlight · 4th May 2007, 07:36 PM

Quote:

Originally posted by Tube_Dude
This design embodies the low feedback school , with the VAS stage severely loaded by two 2K7 resistors to ground...

It's not a very low distortion amp...

What if one eliminated the 2.7K and the snub network from the VAS? The output (albeit overbuilt) reminds me of a low-TIM design from the now defunct Mark-V Electronics kits.

3rd May 2007, 07:55 PM	#1
zerohead_ak47 diyAudio Member Join Date: May 2006	Motorola Power Amplifier

3rd May 2007, 08:22 PM	#2
sakis diyAudio Member Join Date: Jan 2006 Location: nea makri athens greece	more than that i thing that with somany out devices and 52 volts per rail will produce a hell of a lot more than 100w

3rd May 2007, 08:46 PM	#4
zerohead_ak47 diyAudio Member Join Date: May 2006	Re: Re: more than that

4th May 2007, 12:55 AM	#5
MikeBettinger diyAudio Member Join Date: Jan 2006 Location: Virginia	Designed by Andy Hefley of Great American Sound co. (GAS) , there was also another application note from this series that was essentually an updated Ampzilla design. Mike __________________ "We are all agreed that your theory is crazy. The question which divides us is whether it is crazy enough to have a chance of being correct. " Niels Bohr

4th May 2007, 03:34 AM	#6
djk diyAudio Member Join Date: Feb 2001 Location: USA	"i thing that with somany out devices and 52 volts per rail will produce a hell of a lot more than 100w" If you used a fully regulated power supply it would. The Adcom GFA 535 was only rated at 60W/8R with +/- 52V. __________________ Candidates for the Darwin Award should not read this author.


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4th May 2007, 04:12 AM	#7
gearheaddruid diyAudio Member Join Date: Dec 2004 Location: Overland Park, KS	Motorola Amp. I thought that design looked familiar. 52 volt rails should give you close to 100w into 8ohms. Looks like a good project for a p.c. board layout. Would be an easy build for newbies. __________________ Finding new ways for the extreme mis-application of high tech!

4th May 2007, 08:14 AM	#8
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	If i had not seen my agenda calendar lately this would have been a nice April fool schematic. Whoever exchanged the output stage must have transplanted a Vette LS6 engine in his 80s Buick Century stationwagon as well. __________________ Looks like Sponge Bob has killed another thread.

4th May 2007, 06:10 PM	#9
Tube_Dude diyAudio Member Join Date: Mar 2002 Location: Aveiro-Portugal	This design embodies the low feedback school , with the VAS stage severely loaded by two 2K7 resistors to ground... It's not a very low distortion amp... __________________ Jorge

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