Today, most vacuum tube amplifiers are based on the ECC83 / 12AX7 / 7025 ( dual triode ) tubes for the preamplifier and driver sections and the EL84 / 6BQ5 or EL34 / 6CA7 / KT77 or 6L6 / KT66 or 6V6 tubes for the power output section.

Typically, a guitar amp's preamplifier section ( known as a ' pre ') provides sufficient gain so that an instrument can be connected directly to its input, and its main amplification section ( known as the ' power stage ') sufficient power to connect loudspeakers directly to its output, both without requiring extra amplification.

First a preamplifier or mixer is used to boost the instrument output, normally to line level, and perhaps to mix signals from several instruments.

The output from this preamplifier is then connected to the input of a power amplifier, which powers the loudspeakers.

For example, having a preamplifier with a 100-ohm output impedance means the output voltage signal appears to be in series with a 100-ohm resistor.

EMG active pickups ( such as the EMG 60, EMG 81, EMG 85, and EMG 89 ) tend to have much higher output than passive pickups of similar design ( such as the EMG HZ ) because of the on-board preamplifier.

This usage, and the devices, are obsolete, however amplifiers that use a tube preamplifier stage coupled with a solid state output stage are still in production, and are called hybrid amplifiers in reference to this.

The company made the transition to transistor-powered models in 1966 with the " professional " QUAD 50 monoblock which had a tapped transformer output and then the commercial 33 / 303 preamplifier and stereo power amplifier combination and later with the 44 / 405 and subsequent 66 / 606 and 909 models.

The anterior lobe of the pituitary then responds by an increased output of TSH, causing the thyroid to enlarge.

The output work W here is the movement of the piston as it is used to turn a crank-arm, which was then typically used to turn a pulley so to lift water out of flooded salt mines.

The output shaft of the gearbox is permanently connected to the final drive, then the wheels, and so both always rotate together, at a fixed speed ratio.

The data contained in the scene file is then passed to a rendering program to be processed and output to a digital image or raster graphics image file.

Since the invention of the MIDI system in the early 1980s, for example, some people have worked on programs which map MIDI notes to an algorithm and then can either output sounds or music through the computer's sound card or write an audio file for other programs to play.

The controller C then takes the error e ( difference ) between the reference and the output to change the inputs u to the system under control P. This is shown in the figure.

If, i. e., it has a large norm with each value of s, and if, then Y ( s ) is approximately equal to R ( s ) and the output closely tracks the reference input.

If this output is then used as the clock signal for a similarly arranged D flip-flop ( remembering to invert the output to the input ), you will get another 1 bit counter that counts half as fast.

If the two input signals are both sinusoids of specified frequencies f < sub > 1 </ sub > and f < sub > 2 </ sub >, then the output of the mixer will contain two new sinsoids that have the sum f < sub > 1 </ sub > + f < sub > 2 </ sub > frequency and the difference frequency absolute value | f < sub > 1 </ sub >-f < sub > 2 </ sub >|.

Here, complementary or quasi-complementary devices are each used for amplifying the opposite halves of the input signal, which is then recombined at the output.

If the firm is a perfect competitor in all input markets, and thus the per-unit prices of all its inputs are unaffected by how much of the inputs the firm purchases, then it can be shown that at a particular level of output, the firm has economies of scale if and only if it has increasing returns to scale, has diseconomies of scale if and only if it has decreasing returns to scale, and has neither economies nor diseconomies of scale if it has constant returns to scale.

For example, if there are increasing returns to scale in some range of output levels, but the firm is so big in one or more input markets that increasing its purchases of an input drives up the input's per-unit cost, then the firm could have diseconomies of scale in that range of output levels.

Conversely, if the firm is able to get bulk discounts of an input, then it could have economies of scale in some range of output levels even if it has decreasing returns in production in that output range.

Version 0. 46 of Inkscape includes a bucket fill tool, giving output similar to ordinary bitmap operations and indeed using one: the canvas is rendered, a flood fill operation is performed on the selected area and the result is then traced back to a path.

These placeholders are then replaced with the corresponding variable values prior to rendering the final transcluded output in context.

In mathematics, an inverse function is a function that undoes another function: If an input x into the function ƒ produces an output y, then putting y into the inverse function g produces the output x, and vice versa.

In this case, a compiler may output some form of bytecode or threaded code, which is then executed by a bytecode interpreter.

On the other hand, if an algorithm finds the optimal value of optimization problem in polynomial time, then the decision problem can be solved in polynomial time by comparing the value of the solution output by this algorithm with the value of k.

* If the price is between average total cost and average variable cost at the profit-maximizing output, then the firm is said to be in a loss-minimizing condition.

The breakup of Yugoslavia in 1991 deprived the Economy of the Republic of Macedonia, then its poorest republic ( only 5 % of the total federal output of goods and services ), of its key protected markets and large transfer payments from the center.

However, a common and well-accepted metric is the half power points ( i. e. frequency where the power goes down by half its peak value ) on the output vs. frequency curve.

This causes a small portion of the microphone output to be fed back to the speaker, while the rest of the AC current goes out through the phone line.

The force of gas pressure on the rotor ( to a first approximation ) goes directly to the center of the eccentric, part of the output shaft.

The putamen and caudate are jointly connected with the substantia nigra, but most of their output goes to the globus pallidus.

A very important large output goes to the lateral septal area and to the mammillary body of the hypothalamus.

The output goes up and down only a small fraction of the amount the input goes up and down.

If a middle-layer subswitch is found that connects to both the needed input and output subswitches, then it is allocated, and the connection goes through.

However if the input goes past the limit, then the feedback will change sign and the output will move in the opposite direction until it hits the opposite limit.

The output of a modified square wave, quasi square, or modified sine wave inverter is similar to a square wave output except that the output goes to zero volts for a time before switching positive or negative.

The output from the ILS receiver goes both to the display system ( head-down display and head-up display, if installed ) and can also go to a Flight Control Computer.

Simple pipelines like the one described above are called linear ; a single input document always goes through the same sequence of transformations to produce a single output document.

True-bypass occurs when the signal goes straight from the input jack to the output jack with no circuitry involved and no loading of the source impedance.

Each component value is fed to a separate DAC, whose analog output goes to the monitor, and ultimately to one of its three electron guns ( or equivalent in non-CRT displays ).

Problems met in social, economic or natural sciences may entail the use of computer models, which generally do not lend themselves to a straightforward understanding of the relationship between input factors ( what goes into the model ) and output ( the model ’ s dependent variables ).

The output from the two primary scrubbers goes into the single secondary scrubber of welded steel construction ( diameter, tall ).

The left ventricle develops volume overload because with every contraction it now has to pump out not only the volume of blood that goes into the aorta ( the forward cardiac output or forward stroke volume ), but also the blood that regurgitates into the left atrium ( the regurgitant volume ).

The output then goes to an audio processor, and finally to the transmitter, feedline, and antenna.

The output from the motor sector of the SC goes to a set of midbrain and brainstem nuclei, which transform the " place " code used by the SC into the " rate " code used by oculomotor neurons.

The output of the vertex shader goes to the next stage in the pipeline, which is either a geometry shader if present or the rasterizer otherwise.

The output flows under NH 122 and goes into Dunklee Pond which then outflows to Pennichuck Brook, a tributary of the Merrimack River.

The Cournot Theorem then states that, in absence of fixed costs of production, as the number of firms in the market, N, goes to infinity, market output, Nq, goes to the competitive level and the price converges to marginal cost.