On Jan 22, 5:52 am, Ross D Matheson wrote:
Are there any here who know this instrument, or know who might know whether it
could be used for more general audio work, beyond the commented link in this?

Bruel & Kjaer 2107 Frequency Analyzerhttp://www.trademe.co.nz/Browse/Listing.aspx?id=136643465

It's a well constructed, benchworthy and easy to use LF selective
level voltmeter and oscillator and would be a good acquisition for a
hobbyist with some bench space. I'd like to have it myself but the
shipping would be killer.