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balanced
In telecommunications and professional audio, a balanced line or balanced signal pair is a circuit consisting of two conductors of the same type, each of which have equal impedances along their lengths and equal impedances to ground and to other circuits. The chief advantage of the balanced line format is good rejection of common-mode noise and interference when fed to a differential device such as a transformer or differential amplifier. Common forms of balanced line are twin-lead, used for radio frequency signals and twisted pair, used for lower frequencies. They are to be contrasted to unbalanced lines, such as coaxial cable, which is designed to have its return conductor connected to ground, or circuits whose return conductor actually is ground (see earth-return telegraph). Balanced and unbalanced circuits can be interfaced using a device called a balun.
Circuits driving balanced lines must themselves be balanced to maintain the benefits of balance. This may be achieved by transformer coupling (repeating coils) or by merely balancing the impedance in each conductor.
Lines carrying symmetric signals (those with equal amplitudes but opposite polarities on each leg) are often incorrectly referred to as "balanced", but this is actually differential signaling. Balanced lines and differential signaling are often used together, but they are not the same thing. Differential signaling does not make a line balanced, nor does noise rejection in balanced cables require differential signaling.
First of all hello to all here.
First post, so here goes...........
I found Monodraught after a bit of Googling, and their balanced vertical flue system seems to be the perfect solution to my "plant room" problem.
Monodraught Ltd - Vertical balance Flues
Unfortunately they will not quote as...
JEF
Thread
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Hi All
Hoping this is OK to post here as my 1st post!
We have an old, but very effective Glow Work Space Saver balanced flue boiler driving our central heating. It heats the water well, and provides plenty of heat to the radiators and hot water tank.
However, this last day or so has seen...
theMusicMan
Thread
balanced
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inside
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leak
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