Mike Gilmour wrote:
Nick,

Thanks, I could also try an small active 'buffer' stage to prevent loading
on the cartridge and accidental phantom damage. This stage would have to be
very quiet so SS I expect. I agree with having the network after the
preamp, loss of gain would probably not be too much of a concern. The HV-3B
Input Z = 6,200 ohms, o/p Z = 24.3 ohms. With a frequency response to -3 dB
points Sub 2 Hz to over 300 kHz -its also good for seismic or bat
measurements ;-) This is looking like another winter project to get me back
into building circuits once again :-)
I don't have spice as I've been away from circuit building for many years.
I'll do a google search to see what comes up.

I have found LTSpice to be a nice simple (free) way of messing around
with ideas, and great for fiddling about to get a flat RIAA response.

http://www.linear.com/software/

--
Nick