Mobile audio mixer and mono amp

[Earthshaker]

Any body know of a source for schematics, or complete units for mobile (PA) mixers and amplifiers?

 

[Nigel Goodwin]

Any body know of a source for schematics, or complete units for mobile (PA) mixers and amplifiers?

What do you mean by 'mobile', also what is the intended use?.

 

[Earthshaker]

Nigel, mobile as in motor vehivle permanently mounted. The intended purpose is "radio rebroadcast" ie the radio in in the car and I want to hear it (and others) outside the car at an amplified level, with a provision for PA

 

[Nigel Goodwin]

Nigel, mobile as in motor vehivle permanently mounted. The intended purpose is "radio rebroadcast" ie the radio in in the car and I want to hear it (and others) outside the car at an amplified level, with a provision for PA

Try having a look at **broken link removed**, which has a number of mixer and amplifier designs - however, the big problem in a car is the lack of voltage?.

 

[monkeytree]

generator running of the engine?

 

[Earthshaker]

sometimes yes sometimes no. the reason I have inquired about this particular problem is because years ago you could buy a small mobile pa system that was about the size of a car cassette player, 50 watts output
but now days there is nothing available except 50 and 100 watt sirens but I really don't want or need the temptation, why isn't there anymore mobile pa systems that are compact? So I quess I will have to build my own system.

 

[Nigel Goodwin]

sometimes yes sometimes no. the reason I have inquired about this particular problem is because years ago you could buy a small mobile pa system that was about the size of a car cassette player, 50 watts output
but now days there is nothing available except 50 and 100 watt sirens but I really don't want or need the temptation, why isn't there anymore mobile pa systems that are compact? So I quess I will have to build my own system.

You can still buy them, companies like Eagle make them - they use a speaker matching transformer to overcome the voltage limitations in the car.