Questions tagged [unbalanced]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0
votes
1answer
36 views

RS485 unmatched line - what will be the impact?

I am doing an experiment where I have a computer with an rs485 transceiver on it and data rate of 1Mbs. an rs485 30m long with Z0 of 120ohm (also have one with Z0 100ohm). at the end of the cable I ...
0
votes
0answers
68 views

How can I calculate the voltage on the load with an UNUN (unbalanced-to-unbalanced) RF transformer?

I'm having hard time calculating how much RF voltage would be applied to the load in presence of an RF transformer (Unun with a specific ratio). Let me draw a simple circuit diagram. The AC power ...
1
vote
1answer
83 views

'true' balanced audio?

I was working on the below circuit, to create a balanced audio output. But have been told this creates a differential audio output, not a 'true' balanced audio output. "A true balanced output would ...
0
votes
2answers
198 views

balanced to unbalanced audio switch

I have an audio source input, that I am putting through the circuit below to create a balanced audio signal. There will be one of these for each channel, left and right. I have been asked to provide ...
1
vote
1answer
40 views

Padding/impedance matching of a phono input

My old stereo amp got coffee spilled on it. I replaced it with the latest model from the same manufacturer. I am an old-world person, and prefer simple approaches - i.e., radio buttons to select ...
0
votes
1answer
75 views

Unbalanced voltage on 3-phase wind turbine system

I work on wind turbines, I am a troubleshooter. I have a problem on the turbine which I cannot solve so far I would like to ask the help of this community. When turbine starts to generate, an ...
1
vote
1answer
134 views

“Ideal” way of using 3-conductor cable for unbalanced audio

I am intending to make some short (<30cm) unbalanced audio cables to interconnect devices on a musical instrument pedal board. As a matter of convenience, I was thinking of using some Belden 9451 ...
0
votes
3answers
293 views

3 phase unbalanced lighting system

I am working at oil pump station plant as electrical technician, I have 4 years experience in the field, and I face a problem which you can help me with. I appreciate any kind of information that will ...
-1
votes
1answer
131 views

Need to convert unbalanced to differential input OPAMP

I have the following filter after the DAC chip (currently with unbalanced outputs) working very well, but I need now to change the DAC chip. The new source has differential outputs. Is there a ...
0
votes
1answer
610 views

Single phase heater loads on 3 phase supply

I have two single phase heaters (same rating) that I have to connect to a 3 phase supply. Say for example the rating on the heater is 1000W, 208V. And the supply is 208V,3phase,60Hz. I connect heater-...
1
vote
2answers
281 views

What are the limitations of “fake” balanced audio cables?

I have an AV receiver providing amplified outputs and preamp outputs. The pre-amp outputs are in the form of (unbalanced) RCA jacks. My speakers are amplified and have a balanced input. I was looking ...
0
votes
0answers
69 views

How do distribution/transmission operators manage unbalances from LV grids?

Low voltage (LV) grids are characterized for being unbalanced due to: 1) the considerable amount of single loads, 2) unbalanced three-phase loads, and 3) unequal impedances in the cables/lines that ...
0
votes
0answers
542 views

When is it safe to ground DC- (specifically audio output)?

With regard to audio devices, if all equipment is unbalanced and there are no DC- connections to earth ground, equipment will generally operate hum/noise free despite large common mode voltages ...
0
votes
1answer
64 views

Troubleshooting Noise/Quirks in Audio Circuit

I am working on a project that takes in a single line-level audio channel and outputs 2 balanced/unbalanced +/- outputs from that channel. I have read a number of the excellent published articles ...
0
votes
1answer
603 views

How does noise affect an unbalanced signal on a balanced cable?

With regard to audio and balanced signals with XLR connectors, how does noise affect an unbalanced signal on the same cable that normally carries a balanced signal? To give some background, I have a ...
2
votes
2answers
1k views

Unbalanced three phase system with unbalanced phase to phase voltages

I've got quite a problem here trying to solve this 3 phase system (2nd U12 should be U31) and hope you can help me: I'm trying to calculate the single phase voltages and currents for the drawn case ...
0
votes
1answer
2k views

Total power measurement in 3-phase unbalanced delta system

I have a 3-phase system with an unbalanced delta load, as seen in the figure below. I want to measure the total apparent and active power consumption and if possible, the respective power consumption ...
0
votes
1answer
450 views

Hum Cancelling Circuit

Consider the following circuit: I was just thinking about how connecting consumer grade unbalanced electronics together has a tendency to generate hum. For example, I have a little mixer that has an ...
3
votes
2answers
552 views

Unbalanced differential pair in NE5234

I had a question in mind. I was reading "Design and Analysis of Integrated Circuits" by Gray and Meyer... In the edition 5 there is an analysis of a Low power OpAmp NE5234... In the second stage of ...
1
vote
2answers
335 views

Transfomation of impedance using a balun

I need to convert 75 ohms balanced impedance to 50 ohms unbalanced impedance using a balun. How do I do that? I am new to this and don't really understand the concept of a:1 voltage and current baluns....
0
votes
1answer
141 views

Undriven element when connecting coax to ground?

In playing around with some RF beacons I noticed that there is generally just one driven element, with the other elements connected to ground if present. I'm having some trouble wrapping my head ...