Unit and speech amplifier tube V l B in the Amplifier Unit are also connected in
series. T h ese two series circuits with the series filament resistances R8A and
R 1 8A are connected in paral lel and receive their supply by connecting terminals
3 and 4 of the Osci llator
l
Tnit to terminals
11
and 36, respectively, of th e
Amplifier UniL
The filaments of vacuum tubes V 4A and V5A of the AC temperature con
trol panel in the Osci llator Unit receive thei r power supply from the filament
wind ings of transformer T2A.
The DC temperature control panel has the filament of vacuum tube V6A
eonnected in series w ith the filament of V7 A, the series resistances R36.1A,
R36.2A, R37 .1A, R37.2A, and the grid bias resistance R35A. This series circuit
is connected th rough fuses F l .IA and F l .2A and snap switch DlA to term inals
1
and 2.
FIRST
AMPLIFIER
PLATE
CURRENT
No.
D-87738
Oscilla tor Unit-Front View
[
8
J
SECOND
AMPLIFIER
GRID
CURRENT
