Hi Bluejets,
There was an attachment. Did you see it?
Thanks
As
@bertus said, it is a block diagram.
Tho it does show several individual components, eg - resistor on the input, capacitor to ground and a speaker on the output.
There are a lot more components not shown that are in those little blocks - N1, N2 - N6
1)
What component is " L=47xx, c=1xx" ...never see this kind of symbol before --- that is showing a block diag of a low pass filter
L47x = an inductor of a specific value and the C1x a capacitor of a specific value , the values are decided to produce a low
pass filter with a certain cut-off frequency
2)
And also "P1" --- P1 is a variable resistor which provides feedback
3)
And what component is "1" (N1) -- As I said in my first comments, a block of a number of components
4)
BS 170 or BS 250 are transistor. So point 'B" is Gain and point "c " is Drain . Where is Source?
--- BS 170 and BS 250 are most likely transistors and again as I said, it's just a block of multiple other components
That is why you see no individual pins of those transistors
A triangle symbol, like that in an amplifier system, usually indicates an amplifier stage.
Like in this multi-stage RF (radio Frequency) amplifier module. Each triangle represents a transistor and its associated components.
ALL those stages are contained within a single module - that black module the M57762
none of the external components are shown. The block diagram is representative indication of the
internals of that module.
In an actual circuit diagram, A triangle symbol usually represents an individual IC (Intergrated Circuit)
and most likely one that is being used as an amplifier.
This may be an op-amp (Operational Amplifier) IC eg a TL072 or an actual amplifier IC eg a TDA2052
Here is 3 different ways of looking at a TL072 op-amp
A drawing of the actual IC.......
A circuit representation - Block diag. .....
There are 2 of these op-amps inside the single package
and, finally, the internal circuit of this op-amp .......
(there are 2 of these circuits, one inside each triangle package of the TL072 hence why it's called a Dual op-amp)
So you can see that a single triangle symbol can represent many individual components
hope that helps
cheers
Dave
