User's Manual
12
circuit topology
The tube employed in the Reference Gold and Reference
Cardioid is a dual-triode 12AX7, forming an enre gain-block.
The tube used in the Reference Silver is a 5670 dual-triode.
Both tube types are easily obtainable and user-replaceable, and
are mounted in ceramic sockets inside the microphones.
Removing the two Philips screws at the base of the microphone
body allows the complete microphone body & suspension to be
removed so the tube may be replaced easily. There is no need
to separate the body from the suspension system.
(See page 14 for more informaon on tube replacement.)
Be very careful not to touch the thin gold capsule at the top of
the assembly, as the diaphragm is very fragile - even a single
ngerprint on the diaphragm can destroy it.
The output of the tube stage is coupled through a custom built
Manley IRON
®
output transformer of unparalleled quality and
substanal physical size employing nickel laminaons. The
windings incorporate bi-lar winding technique for superior
hum rejecon. The nished transformer is then resin poed in a
mu-metal enclosure.