Amplified Radio Signal Without a Capacitor?

It really would depend on what that capacitor was doing there...

It could be supply decoupling, dc voltage blocking acting as a resonator...

Have you a circuit diagram of this amplifier?

The capacitor was designed to be in there for a purpose so if you remove it you will effect the operation of the amplifier, but in what way is impossible to tell without a circuit.

John.

Hi Electroman!

...while you are answering that question, how about some more?

What will happen if I remove the keyboard from my compu

LOL @ Del

Your computer will not start up because of keyboard error.

Sorry I can't reply...'cos my computer won't start up....

whats a keyboard

can all of you see how easy a blog can spiral out of control!

Re-install the capacitor, spiraling will stop right there and than!!!

Wangito

capacitor is for ac coupling in an amplifier such amplifiers are called rc coupled amplifiers
the resistor at the collector and the capacitor at the o/p serves as the coupling elements.if the coupling capacitor is removed the dc comonent of the voltage gets added up making disturbances in nxt stage amp(drift in bias).In the case of giving the o/p to a loud speaker we use capacitor for bass boosting ( i think so anybody have some objections,pls reply to the forum).

sorry ,for replying to this forum as a guest!

removing the coupling capacitor increases the bandwidth of the amplifier .It increases the response at lower frequencies.

How do you know its not being used as a power supply filtering capacitor, or as a tuned circuit element?

If its used as tuning element in an if strip then it most definitely won't increase bandwidth or the low frequency response...

John.

Output capacitors in audio amplifiers can be used for two purposes:- DC isolation so that you don't get DC currents offsetting the position of the cone of your loudspeaker (and possibly overheating the loudspeaker coil and the amplifier output stage as well), or
Reducing the low frequency output - as in a crossover network, or to protect a physically small loudspeaker from amplifier overdrive (similar input levels cause small loudspeakers have to move further at low frequencies)Generally the effects are combined.

Capacitors in RF stages similarly provide DC isolation to protect both the drive and any externally connected equipment; of course they also provide low frequency blocking. But in many cases they also form part of the resonant circuit that allows the amplifier output impedance to match the impedance of the driven cable (transmission line) or antenna.

Fyz

Assume the capacitor mentioned is the one connected between the out put of the active element (say, collector of a power transistor) and the speaker. If this is removed, there are chances that your speaker will burn! This is due to the reason that the capacitor provided in this case is to block the DC flowing from the collector of transistor to the LS at the same time passing the amplified alteranting signal.

Cheers!

u r right