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147 leslie hookupwave, pardon our interruption

Only this approach can offer digital Leslie models that are indistinguishable from the originals when placed in the same room and miked the same way. In the amplifier, the signal to control the speakers is a DC voltage sent equally on the two audio wires it is common mode, and the amplifier's balanced input ignores it.

Connect the guitar amp to pins 1 gnd and 6 signal.

Leslie 147 Manuals

S1 connects the 50v source to the time constant network and then to the signal wires. If you want to build it for someone else once or twice, that's fine.

This is especially true if you are using the Leslie cable as a way to get signal to the amplifier. The relay requires V AC for operation.

It would be a good idea to put a short time constant on 147 leslie hookupwave voltage as it is applied to the signal lines. The filter capacitor is weak.

They require VAC for operation. The bypass capacitor which parallels the cathode resistor is shorted. The total effect of the moving sources makes synthesizing the sound particularly difficult; a great deal of effort has been expended in trying to make an effect pedal that emulates a Leslie.

Differences between Leslie 147 and 122

If this voltage is low; Some power supply voltages are weak. Usually the plate load resistors give very little trouble. The plate voltages should be checked on pin 1 and 6.

This voltage should be around VDC. This voltage drop can vary somewhat and as long as it is close, you are OK. Electro-Music the CBS division that produced the Leslie tried wrapping this into a single package with the series cabinets.

If you make a special cable, so the audio input to the amplifier doesn't run alongside the V AC power, then you may be able 147 leslie hookupwave get past having to use a 1: The first voltage comes off the rectifier which may be a tube circuit on very old models or dorinta de mihai eminescu online dating likely a bridge rectifier made out of four diodes.

Different tubes will affect the voltages depending on their conduction. R5 and R5 make a 6: If you wanted a footswitch sort of thing footswitch plugs into the interface boxthen wire S1 as a short circuit, turn R3 into two 47k resistors, and wire the footswitch to short their junction midpoint to ground.

T1 can be just about any sort of 1: Supply power for the Leslie across pins pins 3 and 4. The OC3 tube is the regulator and is very important to the proper operation of the amp. The amplifiers AmpliTube Leslie has a distinct advantage over its competitors with its circuit-modeled amplifiers which are critical to recreating the signature tone of these incredible units, especially when overdriving the amp circuit, typical of genres like rock and blues.

Treat this with respect. These voltages are general and depend highly on the line voltage and the circuit load. C1 filters this, just to be sure.

Interfacing to a Leslie Speaker | Uneeda Audio

Because of the presence of VAC within the Leslie cable, you need a low-source impedance to drive the input to help guard against hum. You can think of these digital Leslie models as providing actual audio recordings of the real cabinets, they are much more than an emulation algorithm!

Set the input impedance switch to 8-ohms. If this voltage is high; The power supply voltages may be high. The ohm resistor on pin 2 of the OC3 regulator acts as a current limiter and is a common failure part. A UTC A21 will also work, with the advantage of being magnetically shielded.

The 12AU7a tube requires a voltage to the plates.

Checking the Power Supply Voltages.

Bad tube usually If these voltages are high; The line voltage may be high. Keep in mind that V from the power line is on pins 3 and 4, and you should treat this with an appropriate amount of respect.

If it's too much trouble to derive the voltage for rotor control, and you just want the leslie effect, then unplug the high-speed or low-speed rotors from the amplifier and power them from an extension cord.

Make sure the amp is small, a pair of 6V6 or EL84 or less. If you want to use something bigger, either connect it directly to the Leslie's speakers, bypassing the Leslie amplifier or use a power attenuator as a dummy load and set the Leslie's input impedance switch to OPEN.

Again, set the switch to OPEN, and connect to pins 1 gnd and 6 signal. Amplifier Schematics Leslie and Hammond Schematics The Total System The Leslie's unique sound, especially when combined with a Hammond organ and a player who has figured out the nuances of this total instrument, are particularly musical and suited to many different musical genres arguably rock, blues, and jazz most often make use of this.

Because of the solid-state amplifiers, however, these units were not at all musical when played into overload.

This is not the time to be P. The screen or pin 4 should be VDC lower. Find a competent tech who can read this description and follow it, and have them do the work.

Amplifier drive Rotor drive The Leslie The simplest way to drive the amplifier is to put some sort of 1: There is one place I like to check first that gives you a fast indicator as to whether the Amp is operating correctly. The power rating is 10W at 8-ohms, 20W at ohms. When the switch is set to OPEN, the amplifier input is line level, 10k unbalanced.

The cabinets Leslie cabinets are very complex to reproduce in the digital realm because of the number of time-variant effects that happen within the sound simultaneously during the rotation of the rotors.

The Leslie This amplifier, because of the unbalanced input, is a bit more problematic to drive. This is the Cathode Resistor for the output tubes.

Hammond XK3 met leslie 145 (147)

The details of the Leslie interface are left as an exercise for the interested student. It should be around VDC. The second voltage is found after the choke transformer.

R1 and R2 apply the common-mode DC control signal to the signal lines. The best sounding Leslie models in digital form, period. In addition, the bass clipping causes intermodulation distortion that modulates the higher notes being played, making them in the extreme gargle.

If you want rotor motor control, then use the V source at pin 5 to derive a lower voltage about 25v and switch this to pins 1 and 6 simultaneously.

Probably the most definitive sound is the way that the amplifier and speakers overload when overdriven, especially in the bass region.