In the end I decided to borrow a PA from my brother, I will suit this
application, then I will make my own PA for my signal generator using
a LM4780 or some other chip (still reading all the replies!!).


At 17.36 2011.08.15, you wrote:
>At 07:37 AM 8/15/2011, Electron wrote:
>
>>Hello,
>>I have a signal generator which can output 10Vpp.
>>
>>I need 80Vpp @ 50 ohm or less, so I need a 150+ W power amp,
>>preferably DC coupled. Frequency response can be in the audio
>>range, of course the more the better, but right now for my
>>project I only need 30..700 Hz.
>
>If you are in a tearing big hurry, give your local sound (PA) company=20
>a call.  There is a really good chance that they have high-power=20
>amplifiers available for rent for a pittance.
>
>Some brand names that come to mind: Crown, Crest, QSC
>
>I've used all of the above and they are decent amplifiers.
>
>Older brand names that I have used and still like: JBL, Bryston,=20
>Harmon-Kardon, Soundcraftsman, Cerwin-Vega.  There are many, many=20
>others that don't come to mind right now.
>
>Some of the Crown amplifiers are DC-coupled and all three of the=20
>first names that I mentioned are available up to more than 1KW per=20
>channel.  Some go to 2KW per channel but those generally have twin=20
>30A 120Vac cords coming out the back for power input - 30A twist-lock=20
>outlets are fairly rare if you aren't a big PA company.
>
>You can also find older DC-coupled Crown amplifiers on eBay (DC-300A)=20
>fairly inexpensively.
>
>dwayne
>
>--=20
>Dwayne Reid   <dwayner@planet.eon.net>
>Trinity Electronics Systems Ltd    Edmonton, AB, CANADA
>(780) 489-3199 voice          (780) 487-6397 fax
>www.trinity-electronics.com
>Custom Electronics Design and Manufacturing
>
>--=20
>http://www.piclist.com PIC/SX FAQ & list archive
>View/change your membership options at
>http://mailman.mit.edu/mailman/listinfo/piclist

--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.