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Old 19th November 2002, 06:52 AM   #1
Optical is offline Optical  New Zealand
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Default Simple RIAA phono preamps

What about (very) simple designs which achieve worthy results? Are these worth bothering with?

What sort of designs do modern DJ gear manufacurers use? This is a big market, are they going simple or complex in their designs?
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Old 19th November 2002, 07:49 AM   #2
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95% (or 99%!) of all RIAA amps are simple. You have to go over 300 USD in order to get higher "techology". Most RIAA amps consists of a NE5532/34 or a 4556 plus a few passive components.

Check for instance NAD PP-1 and MTech, not cheap, very simple.

The vinyl market is rather limited these days and has no future (like tubes).
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Old 19th November 2002, 08:10 AM   #3
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Default Re: Simple RIAA phono preamps

More complex than the ones peranders pointed out, but cheap.

http://www.hagtech.com/bugle.html

dave
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Old 19th November 2002, 08:38 AM   #4
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Default Re: Re: Simple RIAA phono preamps

Quote:
Originally posted by planet10
More complex than the ones peranders pointed out, but cheap.
http://www.hagtech.com/bugle.html
This was a new one, never seen it. Very beautiful, but batteries.... 16 hours at 4-6 USD (in Sweden), expensive but rechargable batteries are an alternative.

Rather high noise though (but lower than the vinyl itself). I wonder if the gain is for 1 kHz?

http://www.hagtech.com/trumpet.html

Cool!
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Old 19th November 2002, 08:42 AM   #5
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Default Re: Re: Re: Simple RIAA phono preamps

Quote:
Originally posted by peranders
This was a new one, never seen it. Very beautiful, but batteries.... 16 hours at 4-6 USD (in Sweden), expensive but rechargable batteries are an alternative.
He does mention adding a normal power supply... which is what i would do.

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Old 19th November 2002, 08:47 AM   #6
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I think that Hagtech is an exception, most RIAA amps are high priced and low tech. Under 100 USD = junk (more or less).
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Old 19th November 2002, 08:52 AM   #7
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DJ mixers invariably use a simple phono preamp design. Check out the schematics on www.rane.com
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Old 19th November 2002, 09:11 AM   #8
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Default The Bugle

Hi!
I have built the bugle, and IMHO, it is a "Black Cube Killer".
(I had a "Cube", witch now is sold...).

My version: See picture

Arne Karlsen
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File Type: jpg silverbugle-1.jpg (96.1 KB, 1474 views)
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Old 19th November 2002, 09:43 AM   #9
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Default Re: The Bugle

Quote:
Originally posted by Cobra2
I have built the bugle, and IMHO, it is a "Black Cube Killer".
(I had a "Cube", witch now is sold...).
Nice, I like the front panel! I see also that you thought batteries were too expensive (or messy). Do you have the schematics of the amp? Curious as always.
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Old 19th November 2002, 09:56 AM   #10
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Arne,

Is that one of the chassis from Taiwan (I think) I remember you bought, I think?

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