Mixer is almost certainly a Collins. But it has RCA fader knobs (known for
better tactile feedback).
Shortly after Tom's Dad established the miking for that room I was fortunate
to do one of the first live MSO remote broadcasts for WCCO Radio, using
CRF's mike technique...and a mixer by RCA (OP-6/OP-7 series).
It was a "thrill" getting up into the catwalk to hang that broadcast mike
(an Altec IIRC).
From: Tom Fine
Sent: Monday, September 28, 2015 1:14 PM
To: [log in to unmask]
Subject: [ARSCLIST] a piece of Minneapolis Symphony and Mercury Records
A long-time MLP fan tipped me off to this photo being for sale on eBay. I
jumped right on it!
this is from the very first Mercury recording session in Minneapolis,
January 19-20, 1952. Dorati
made his first recordings of Borodin's 2nd, Stravinsky's compete "Firebird",
Carnival" and pieces by Ravel and Debussy. The tape machines shown are
"portable" Ampex 300's (they
still weighed about 100lbs each, whether or not in portable cases). David
Hall is using what I think
is a Gates portable mixer/mic preamp (it might be RCA or Collins). The
recordings were made with a
single Neumann U-47, and the
Gates unit probably was used to provide a gain stage after the mic and to
distribute the signal to
both tape recorders. David Hall is probably working with Dorati and the
assistant conductor to
gather approved takes he can edit together. The next time Mercury visited
Minneapolis, fall 1952, my
father had built his recording truck.
-- Tom Fine