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Author Topic: Old School : QED preamp  (Read 4,303 times)

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Roving Sign

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Old School : QED preamp
« on: October 04, 2006, 07:37:16 PM »
Just got this thing cheap...15 bucks...

Smaller than the NAK MX100 - and much lighter...runs on 12V DC

I seldom stealth - or even need a DC powered rig - but I thought this looks like fun...

Will report back later...



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Roving Sign

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Re: Old School : QED preamp
« Reply #1 on: February 11, 2007, 11:16:03 PM »
I just took some pics of the innards of this thing...seems like some folks like that! ;D

The pics in the original post were linked from ebay...replaced...

Havent used this thing yet - more of a toy - but fun for cheap...

Whats it look like in there??

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Offline Church-Audio

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Re: Old School : QED preamp
« Reply #2 on: February 12, 2007, 01:15:53 AM »
Quote from: Roving Sign on February 11, 2007, 11:16:03 PM
I just took some pics of the innards of this thing...seems like some folks like that! ;D

The pics in the original post were linked from ebay...replaced...

Havent used this thing yet - more of a toy - but fun for cheap...

Whats it look like in there??



That looks like a good preamp to hack.. Get that ne5532 out and replace it with a OPA2227PA chip.. or TLO82 that's a good place to start I would ditch the electrolytic's in the signal path the two coupling caps near the IC that are electrolytic can go bye bye.. I would put in Tantalum or Mylar 10uf in there place.
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Roving Sign

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Re: Old School : QED preamp
« Reply #3 on: February 12, 2007, 01:18:02 AM »
Thanks for the info - maybe this is where I begin my hacking career!

QED is British stuff I think...
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