Heathkit TA-16 - Page 40

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Peak Power Output.
Music Power Output
Continuous Power Output
Damping Factor
Hum And Noise (inputs open)
Input Sensitivity (25 watts output)
Input Impedance
Reverb Level.
Reverb Delay.
Tremolo Speed.
Tremolo Depth.
Speakers. .
Reverb Section
Touch test point 7 (the base of transistor
Q5); an extremely loud hum shouldbe heard
from the speakers.
Turn the Reverb control fully clockwise and
tap the metal chassis of the reverb unit;
a loud banging sound should be heard from
the speakers.
Return the Reverb control to its fully
counterclockwise position. Touch test point
9 (the base of transistor Q11); the hum
should increase as the Reverb control is
rotated clockwise.
This completes the Point-to-Point Hum check.
SIGNAL TRACING
A signal tracing procedure can also be used to
locate a point of signal loss. First apply a suit-
able audio signal to the input; then, using either
a signal tracer or an oscilloscope, check along
the signal path to determine at which point the
signal is missing. After obtaining this infor-
mation, carefully check the associated wiring
and parts in this area. Figure 2 shows the signal
path for each channel.
SPECIFICATIONS
60 watts.
25 watts*.
20 watts*.
50 or better.
Normal Channel: -55 db below 25 watts.
Reverb Channel: -60 db below 25 watts.
Normal Channel: 25 millivolts.
Reverb Channel: 35 millivolts.
Normal Channel: 25 K ohms (each input).
Reverb Channel: 25 K ohms (each input).
Variable.
Long Spring: .037 seconds (nominal).
Short Spring: .029 seconds (nominal).
Variable from 4 to 14 hertz.
Variable from 0 to approximately 75% ampli-
tude modulation.
Two; 12" special design with ceramic magnet.
*Rated EIA (Electronics Industries Association)
standards.