Tube DIY Asylum: Re: Latest version of my 7788/7721 LCR 600Ohm RIAA Stage by Thorsten Do It Yourself (DIY) paradise for tube and SET project builders.

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Posted by Thorsten (M ) on October 4, 2005 at 15:31:14

In Reply to: Re: Latest version of my 7788/7721 LCR 600Ohm RIAA Stage posted by pickle on October 4, 2005 at 12:34:04:

Hi,

> Could someone explain to me why an LCR network for RIAA
> compensation is more desirable than a RC network.

Because it sounds better. Leave it at that untill you try yourself. Most likely BTW because recrds well into the 1980's where cut using similar pre-emphasis networks....

> And LCR at 600 ohms. Why so low?

Tradition.

> So, why not have zero inductance and avoid the problem entirely?

Because NOT HAVING THE INDUCTORS IS THE PROBLEM!

> There must be a good reason.

Sound quality.

> LCR and 600 ohms seems to be making the a simple job (RC) into
> a most difficult job (LCR).

Well, that is how they cut the darn records....

L8er T

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