[BC] Turn table preamp

[RichardBJohnson at comcast.net]

The two RIAA equalized phono channels seem to use the same three transistors per channel as the circuit from the GE Transistor Manual http://electronicdesign.com/Articles/Index.cfm?AD=1&ArticleID=4780 that I copied when I made new solid-state preamplifiers for WCRB back in  the '60s. If so, they work very well and, in fact, the standard component values became the new time-constants when the RIAA standard became the NAB standard.

The single-sided PC board layout of the preamplifer section looks incredibly familiar and might just be an EXACT copy of the one I did for WCRB! There is therefore, the slight possibility that the current designer once worked for WCRB.

Cheers,
Richard B. Johnson
Book: http://www.AbominableFirebug.com/

----- Original Message -----
From: tosenkowsky at prodigy.net