Connect across output Jack
- - inside ins rument
The GAIN control will vary the gain of the amplifier over a
of approximately 6 db.
This control is provided so that the gain
of the amplifier can be set to a known value if necessary.
is no feedback in the amplifier D so the gain is directly propor-
tional to the Gm of the tubes.
The gain is also determined by he
output load and will vary with output load in accordance with th
280 X ZL
The Wide Band Amplifier can be used with the
Vacuum Tube Voltme er to provide additional sensitivity in meas-
uring high frequencies.
A special adaptor is a ailable to connect
the probe of the Model 410B* to the output terminal
the amplifi r.
The overall frequency response of the Model 460A. in combination
with the Model 410B. is within 1 db out to 190 mc.
nation will give a full scale meter reading on the Model 410B with
1 / 1 0 volt applied to the input of the Model 460A.
Several amplifiers can be cascaded when more than 20 db gain is
The maximum gain which can be used will be limited by
the effective noise generated in the input circuit of the amplifier.
The noise factor is approximately 10 db.
The time of rise of a single unit is approximately 2. 6 millimicro-
As units are cascaded D the time of rise goes up as the
square root of the sum of the squares of times of rise of he
Therefore. for two stages in cascadeD the time
Also Model 4l0A