In article , Arny
Krueger
wrote:
"Jim Lesurf" wrote in message


Well, the measurements I made led to the spec that the preamp using
them had a SNR of 80dB for MM (RIAA) and 92dB ref to 150mV for line
inputs. (And of course was OK for signals up to 10Vrms, so gave a
decent SNR for CD Audio. Although that did arrive *after* the amp was
designed I did have it in mind.)

To put your SNR measurements into perspective, both input and output
voltages, and measurement bandwidth need to be known.

For the line inputs the ref level at the input was as I stated. 150mV rms.
Afraid I can't recall now if the bandwidth was 20-20k flat, or weighted.
Did the measurements nearly 30 years ago! :-)

Slainte,

Jim

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