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Old 16th September 2006, 10:59 PM   #1
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Default Old Amp

I have a Crown DC300A that has been around the block and your block too. I picked it up for free a few years ago when I was wiring some chillers in a bar.

It works but I think the caps have dried up from long term continuous use with high temperatures. The damn thing is almost shrill sounding. It does seem to have a tremendous amount of power. I have the schematics for it and all but what should I do with it? Re-cap it? Throw it in the garbage? Scrap it...for what?

Poor thing, face down on the basement floor. "Don't look at me amp, you make me sick."

Shawn.
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Old 16th September 2006, 11:04 PM   #2
latala is offline latala  United Kingdom
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Post it to me i will pay the postage!
I have 1 in first class condition they can be a nice amp go on spoil yourself re cap it its a design classic! Just think of the live shows and recordings that have been produced with it, its a part of audio history !
regards trev
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Old 16th September 2006, 11:10 PM   #3
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Quote:
Originally posted by bikehorn
while we're on the subject of beer...can i recommend my favourite pilsener? brewed in downtown toronto.
The Old Roundhouse Brew Eh? Good stuff but a little pricy but aren't all the good ones? I must have drank a thousand of those whistles this summer...hmmm beer belly and a drawyer full of bottle openers!!! Ha, I've been mailing them out to all my peeps! BTW if you like good pilsner please try Pilsener Urquell, it is an aquired taste but it is my fav pil.

Now I'm back on the winter beer! Oops Guinness in a Caffrey's glass! How dare I?
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Old 16th September 2006, 11:13 PM   #4
rdf is offline rdf  Canada
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Hi Tom. My recollection is the lower powered models had a nasty opamp front end - a 741 or similar - and an equally nasty hack for a front end supply. If the 300 is the same that and a re-cap is where I'ld start. Right after upgrading to a Litz power cord of course, just to keep these cranky old guys happy. And keep off my lawn!
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Old 16th September 2006, 11:15 PM   #5
latala is offline latala  United Kingdom
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Early one had a 709 ext compensation op amp
regards trev
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Old 16th September 2006, 11:23 PM   #6
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Default DC300A

Open
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Old 16th September 2006, 11:24 PM   #7
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Default Dc300a

Right
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Old 16th September 2006, 11:27 PM   #8
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Default DC300A

Left
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Old 17th September 2006, 12:01 AM   #9
anatech is offline anatech  Canada
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Hi Shawn,
Man, I've rebuilt a number of those over the years. The Metalworks still uses them in Studio "A". The last time I was over there anyway.

That's a class B beasty, or close to it. I don't know if I'd rebuild it ( I might), but the chassis would serve a new design. Very industrial looking. If you remember Martin Audio in Port Credit, I sold them (new) there.

Don't throw it out. If you don't want it, I wouldn't mind it. No shipping then.

-Chris

Edit:
Quote:
Oops Guinness in a Caffrey's glass!
Guinness goes well in any glass! It has taste.
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Old 17th September 2006, 12:02 AM   #10
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Quote:
Originally posted by rdf
edit: A car wash would be a good start on that puppy!
If I get down with this thing, I will take the entire thing apart and rebuild the boards, wiring, power supply...the whole thing. Could be a good fall winter project too. Sandblast the heat sinks and the bell on the XFMR. Make her new again. I might pull it apart tomorrow? I'll need a few boxes and a bunch of glad zip lock bags and label all of it. Take a bunch of pictures...bla bla bla...it could be fun.

Cheers,

Shawn.
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