What is B+ power?

what is b+ power?
i can't find definition or origin of b+?
please explain to me..

 

[Rodney Kelp]

The B is from the 2 humps of the half wave rectifier.B+ uses the two
positive cycles of the AC signal in a half wave rectifier. B- powersupply
uses the 2 negative pulses of a half wave rectifier.
A full wave rectifier flips the 2 negative going ac pulses to the + side
using the full power of the AC signal for DC. A half wave uses only half the
power.

<trimir@gmail.com> wrote in message
news:1105968315.476173.294600@c13g2000cwb.googlegroups.com...

what is b+ power?
i can't find definition or origin of b+?
please explain to me..

 

[Andrew Holme]

tri...@gmail.com wrote:

what is b+ power?
i can't find definition or origin of b+?
please explain to me..

B+ and B- were the high-tension (HT) supply used in thermionic valve
radio equipment.

A+ and A- were the filament (heater) supply
C+ and C- were the grid bias

 

[Michael Black]

(trimir@gmail.com) writes:

what is b+ power?
i can't find definition or origin of b+?
please explain to me..

The B battery supplied the high voltage for tubes in the early days.
There really was a B battery, as there was an A battery for the filament.

So "B+" became the label for the high voltage bus in equipment. It
became so standard, that the term remained even when voltages got
a lot less with solid-state equipment.

Michael

 

[JeffM]

}A+ and A- were the filament (heater) supply
}C+ and C- were the grid bias
} Andrew Holme

The B battery supplied the high voltage for tubes in the early days
Michael Black

Sometimes called the "Plate supply".

 

[Miles Harris]

On 17 Jan 2005 10:40:27 -0800, "JeffM" <jeffm_@email.com> wrote:

}A+ and A- were the filament (heater) supply
}C+ and C- were the grid bias
} Andrew Holme

The B battery supplied the high voltage for tubes in the early days
Michael Black

Sometimes called the "Plate supply".

Or the "anode supply voltage" in Britain. Typically several hundred
volts upwards.

 

[Bob Myers]

"Rodney Kelp" <Rodneykelp605@hotmail.com> wrote in message
news:AY6dnQBGUZCbX3bcRVn-oA@adelphia.com...

The B is from the 2 humps of the half wave rectifier

Nonsense. As was already correctly said elsewhere, the
"B" designation dates back to the early days of battery-operated
tube (valve) radios, in which the "B" battery was the plate (anode)
supply. The "A" and "C" designations have long since died out,
but for some reason you still will come across the "B+"
designation used in many schematics, even those of fairly
recent vintage.


Bob M.

..

 

[John Larkin]

On Mon, 17 Jan 2005 08:47:58 -0500, "Rodney Kelp"
<Rodneykelp605@hotmail.com> wrote:

The B is from the 2 humps of the half wave rectifier.B+ uses the two
positive cycles of the AC signal in a half wave rectifier. B- powersupply
uses the 2 negative pulses of a half wave rectifier.
A full wave rectifier flips the 2 negative going ac pulses to the + side
using the full power of the AC signal for DC. A half wave uses only half the
power.

Except that the designations were originally for battery-powered
equipment, with A, B, and C batteries, as others have noted.

Besides, if we were dealing with voltage bumps, the positive would be
the M supply, and negative would be W.

John

 

[krw]

In article <41ec47dd@usenet01.boi.hp.com>, nospamplease@address.invalid
says...

"Rodney Kelp" <Rodneykelp605@hotmail.com> wrote in message
news:AY6dnQBGUZCbX3bcRVn-oA@adelphia.com...
The B is from the 2 humps of the half wave rectifier

Nonsense. As was already correctly said elsewhere, the
"B" designation dates back to the early days of battery-operated
tube (valve) radios, in which the "B" battery was the plate (anode)
supply.

Right, the 'B' battery was typically 90v. The 'A' battery (1.5V)
supplied the filaments and the 'C' the grid bias.

The "A" and "C" designations have long since died out,

You've never seen a 'C' battery?

but for some reason you still will come across the "B+"
designation used in many schematics, even those of fairly
recent vintage.

--
Keith

 

[Bob Myers]

"krw" <krw@att.biz> wrote in message
news:MPG.1c59ab7c831259d9989744@news3.prserv.net...
the filaments and the 'C' the grid bias.

The "A" and "C" designations have long since died out,

You've never seen a 'C' battery?

Sure, but not on a schematic as the letter identifying
a power supply.

Bob M.

 

[krw]

In article <41effd85$1@usenet01.boi.hp.com>,
nospamplease@address.invalid says...

"krw" <krw@att.biz> wrote in message
news:MPG.1c59ab7c831259d9989744@news3.prserv.net...
the filaments and the 'C' the grid bias.

The "A" and "C" designations have long since died out,

You've never seen a 'C' battery?

Sure, but not on a schematic as the letter identifying
a power supply.

That's only because the few places there are grids, they're biased
other ways. The 'C' battery remains, however. The 'A' has gone pretty
much the way of the DoDo, though.

--
Keith