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Channel Mixing Resistors - EL34 World

Apr 24, 2019  You can use mixing resistors or you can use opposite grids of a differential amplifier (e.g. LTP), or if you have an extra dual triode, you can use a common anode mixer, or if you have one extra triode, you can use it as a

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Channel Resistance - an overview ScienceDirect Topics

The gate resistance has two components, the physical gate resistance and the induced channel resistance: (2.96) R g = R p o l y + δ R c h = 1 3 W L R + 1 5 1 g m. For the optimal source impedance, one can show that (2.97) F m i n = 1 + 2 ω ω T g m R g γ. Doing the best layout possible, we obtain the limit that Rg = 1/5 gm and

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QuickQuestion: Mixing Resistors (more than 2 channels)

Aug 09, 2007  The mixing resistors are there to lessen that loading down effect. But, if you add more mixed channels in there, you're adding more paths for the signal to stray off to instead of the next stage of the amp. It can probably be done, but there will probably be issues with signal losses or noise or something.

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Two Channels, One Volume, One TMB Tone Stack - Mixing Resistors.

Feb 03, 2022  The losses in a tone stack are considerable and a single gain stage CAN overdrive a second if not padded much, In other words, if you're building for a gainy sound/tone it's probably better to place the tone stack as late as practical and mix before the tone stack. If you're building for a cleaner amp it hardly matters.

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QuickQuestion: Mixing Resistors (more than 2 channels)

Aug 09, 2007  i know that newer fenders have 220K or 270K mixing resistors Marshall do have 470K (like 1959 and 1987 amps) mixing resistors ... then the the signal will pass through the channel 1 mixing resistor and then the channel 2 mixing resistor will be connected to ground creating a voltage divider. Even if the opposite volume isn't all the way down ...

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Two Channels, One Volume, One TMB Tone Stack - Mixing Resistors.

Feb 03, 2022  Just link the anodes, no need for mixing resistors, the valve’s internal anode resistance will do it. And will provide lowish impedance output. I am not the 'mixing' pro you know, beyond the basic usage in most guitar amps. Well, and repairing mixers, but that's just kind of tracing and fixing what's broke.

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Mixing resistor question The Gear Page

Apr 13, 2012  The mix resistor on the vibrato channel "sees" the output impedance of the make-up stage in parallel with the intensity pot, yielding roughly 20k in series with it to ground. You can simulate that effect with a 220k to ground tied to the 220k mix resistor from the normal channel. Or just leave out both mix resistors.

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Passive Audio Mixer W/ Channel Volume Control - Instructables

Step 1: Circuit Diagram. This circuit is actually really simple. All the complexity is due to repetition. Basically, all circuits are as follows: input --> output. For an audio mixer, you need a resistor on each input. So, we have: input --> resistor --> output. But, it's stereo so

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Mixer Resistors

Nov 15, 2011  With the plate resistor (after the coupling cap) equaling the input resistors, gain for each input is 1. But you're not going to use a 6922 (6DJ8). For a 12AX7, you'll probably have a 1M feedback resistor, and the mixing resistors could be 1M (gain=1), or 220k (gain=~5) or 100k (gain=10) for a mild adjustment of gain between different source ...

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confused about 220k mixing resistors ab763 Telecaster Guitar

Nov 25, 2021  With a single channel there's nothing to mix, so you can do without both 220k's. You'll still have the 470K from the reverb pot and of course the 3.3Mohm 10pF joined together at the next tube's grid.

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The Valve Wizard

The resistive mixer is the most basic mixing circuit used in amplifiers, and can be found in almost every valve guitar amp ever made. It operates simply by taking the output from each separate channel and joining them together at a point where the signals will mix. A resistor is placed in series with each output simply to prevent short circuits ...

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Mixer resistor values Electronics Forums

Jan 05, 2017  In this case, I would suggest your original approach of a passive mixer to mix your Left/Right into a single Mono Channel, or see if you can run the outdoor stereo in 'Bridge mode' or Mono. (As long as your indoor stereo is connected to the audio-out of the PC *before* your resistor mixer, you will still get stereo in the house although you may ...

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AB763 Mods - Rob Robinette

The mixing resistors prevent channel interaction. Here's the mod, refer to the layout below: Note: if you're going to do the Lead Channel Mod then do it first because this mod places the Normal channel coupling cap across the cathode resistor and bypass cap. 1. Desolder and pull the Vibrato channel .02uF coupling cap output end loose and bend ...

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5 Simple Audio Mixer Circuits Explained - Homemade Circuit Projects

Jun 01, 2022  Even so, the audio mixing range could be practically endless. Before you start building consider which preamplifiers you might need, consider which kind of sockets you would like to work with, and the number of channels you would like (although demonstrated as 4 channel, the mixer could be extended with the addition of further control pots and mixer

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Multi-channel audio mixer circuit using LM3900

Jul 27, 2011  A simple multi-channel audio mixer circuit using LM3900 quad amplifier is given below. The circuit consists of 4 channel quad amplifier (LM3900). Two mic audio inputs and two direct line inputs are available in this circuit. By adding the same circuit parallel with this, you can increase the number of inputs according to the applications.

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Traynor YBA-1 - Bliss Amplifiers

The later "Plexi" Marshalls use 470K resistors. The Traynor used a comparatively low value of 100K. As I mentioned above, the bright cap was just too bright. Then I noticed something. The Marshall has a capacitor in parallel with the mixing resistor of the bright channel mixing resistor.

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Behringer Micromix MX400 Line Mixer - Sweetwater

Whether you're combining keyboard signals, sending multiple signals to a single speaker, or any other small-scale mixing task, you'll be glad you have the Behringer Micromix MX400. Related Videos: Micromix MX400 Line Mixer. Behringer Micromix MX400 4-channel Mono Mixer Features at a Glance: 4-in/1-out mono mixer 1/4" TS inputs and output

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My parallel/cascaded triodes preamp switch - Chasing Tone

Apr 21, 2019  Here is the schematic of the switch: When the switch is in the up position it’s in parallel mode. This is the basic plexi high treble and normal channel setup. The mixing resistors are before the switch. The treble channel enters the middle of the right side of the switch and exits the top right. The normal channel enters the top left side of ...

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Two Channels, One Volume, One TMB Tone Stack - Mixing Resistors.

Feb 12, 2022  From what I've gathered and seen using mixing resistors on the input grids of a tube is kind of norm for lack of better words I guess. But, what I'm wondering is say you wanted to use Two Channels, One Volume, One TMB Tone Stack? Would you put the mixing resistors right before the tone stack with the volume after the tone

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Audio Signal Mixing - Elliott Sound Products

Sep 27, 2010  For example, using 10k mixing resistors and a 10 channel mixer, the individual channel gain is -1 (unity, but inverted), the noise gain is 10, and the mix amp will have the frequency response you'd expect of the same opamp operating with a gain of 10. If more channels are added, the high frequency -3dB point will reduce, exactly as it does if ...

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Mixing analog audio signals with resistors

I think you'll need more than just resistors to do what you are describing properly. You should probably go active. You could try a simple summing amplifier like this:. This will invert your signal but you can always add another

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3 Channel Audio Mixer Circuit - ElectroSchematics

Diagram 1.0 shows the 3-channel sound mixer circuit using three Norton-opamps. The input levels can be set by potentiometers P1 or P3. Furthermore, each input level can be trimmed with the help of trimmers pots P4 to P6 to

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confused about 220k mixing resistors ab763 Telecaster Guitar

Nov 25, 2021  With a single channel there's nothing to mix, so you can do without both 220k's. You'll still have the 470K from the reverb pot and of course the 3.3Mohm 10pF joined together at the next tube's grid.

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2-channel with mixing resistors and channel mixing pots?

18watt Technical Discussion. Donations. Links

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Passive audio mixer resistor values All About Circuits

Jun 18, 2020  Jun 18, 2020. #5. Headphones are usually 32 ohms for each ear. Since you are mixing two different signals then both are probably stereo and you are showing the mixing for only one earphone. 100 ohms in series with one 32 ohm earphone attenuates 32/ (100 + 32)= 0.24 times which is -12.4dB. 20 ohms on series with 32 ohms attenuates 32/ (20 + 32 ...

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How the 5E3 Works - Rob Robinette

The unused channel volume pot and 100k plate load resistor change the load on the channel in use and therefore affect the gain. The unused channel load can run from 100k at max volume to 1M at min volume. ... [Bonus info: The Grid Stoppers also act as 'mixing resistors' to prevent interaction between two simultaneous Hi and Lo inputs like two ...

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Multi-channel audio mixer circuit using LM3900

Jul 27, 2011  A simple multi-channel audio mixer circuit using LM3900 quad amplifier is given below. The circuit consists of 4 channel quad amplifier (LM3900). Two mic audio inputs and two direct line inputs are available in this circuit. By adding the same circuit parallel with this, you can increase the number of inputs according to the applications.

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Naively mixing two (or perhaps more) audio signals - Electrical ...

Mar 19, 2014  19. The simplest way to combine two signals is with two resistors as shown in the circuit diagram below. simulate this circuit – Schematic created using CircuitLab. The ground connecton is shared between both inputs and output. The quality can be improved by adding an output buffer (opamp), but that complicates things in requiring an IC ...

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Mixing 2 Channels for Reverb - Music Electronics Forum

Mar 27, 2012  in titles only in Theory Design only.. Advanced

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Changing mixer resistors to 470k - Metropoulos Forum

Jan 29, 2010  What you can do is plug in to the bright channel and set volume as desired, and then set the normal channel volume between 3-6. This will add more resistance from the norm volume pot between the norm 270K mix resistor and ground and you will hear a slight gain increase and also a slight thickening of tone. Play around with it and see.

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7 Best 4 Channel Mixers With Effects 2022 ( Without)

Jan 04, 2019  The PROFX is an affordable, quality mixer that comes in a few different configurations – 4-channel, 8-channel, 12-channel, 16-channel, 22-channel and 30-channel. This Mackie mixer comes equipped with four low-noise Mackie Vita preamps, a three-band EQ with 100Hz low-cut filter on all channels, a five-band graphic EQ for tuning mains or ...

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