The original poster should jump on this opportunity to buy a pair of
great vintage 12AX7 and tell his spouse, "Really dear, I need to build a
phono preamp for a client." --J.B.
Dennis Kutchera dennis.kutchera@gmail.com [Avid-L2] wrote:
>
>
> For 78 RPM records, there is also a completely different EQ curve from
> RIAA found in modern phono stages, often it was just flat. Here is the
> kind of switchable phono preamp you need to transfer 78s correctly. My
> Dad had a Motorola hiifi (not stereo) with selectable turnover and
> rolloff switches to correctly eq the myriad of "standards" prior to
> everyone agreeing to the RIAA EQ curve in the late 50s.
>
> http://www.vadlyd.dk/English/RIAA_and_78_RPM_preamp.html
>
> And if you want to try to unravel the EQ to be correct in post, there
> is a chart on this page that gives all the 78 specs according to
> record brand and vintage.
>
> http://sound.westhost.com/project91.htm
>
> If you have to ship them, keep in mind that 78s will shatter. Pack
> them like museum objects.
>
> Dennis Kutchera
>
Posted by: john beck <jb30343@windstream.net>
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