Soundcraftsmen reset delay

[Racingh11]

I'm hoping you bought that electrical formulas book.. lol I'm thinking of another question. I might start another thread.

 

[Racingh11]

Here's a warmup for then next question. What are the 4 main resistors that determine the gain of the amplifier? And if you get that, what is the input voltage required to produce maximum output voltage at rated power?

 

[Racingh11]

lol I just noticed that post changed again. People may be confused with the dialog in this thread.

 

[avionic]

Avionics,

I don't have time to play games..Don't work on SC much. Primarily Yamaha.

 

[Jimbo40]

I guess I could give you another chance, but this is going to be a tough one!

What color is CR30?

Red

 

[Racingh11]

Red

Ok, what size shirt?

 

[Racingh11]

Ok, what size?

Or color? black, blue, gray, green, white, yellow?

 

[Racingh11]

Shirt is on the way.

I would have given you a bonus if you explained, that technically 3.3 seconds is only a rough estimate since the amp is triggered on before the C28 .22uF cap is fully charged...
The cap here is actually charged at a current of .000000763A determined by the 15M ohm R73((12V-.55V)/15,000,000). For the next stage to trigger, pin 2 needs to match the .0001145A at input pin 3. So that amperage plus the feedback through R76 1M ohm has to go through R75 75k ohm.
.00011505A X 75000 = 8.62875V. Plus the .55V at the input means pin 5 triggers the amp on at 9.18V. The cap has .55V on the other side of it at pin 6, so it still only gets charged with 8.62875V.

8.62875V X .00000022F = .000001898C

.000001898C / .000000763A = 2.488s

2.488, or about 2 1/2 seconds is the calculated time from turn on until the triac is triggered or during protection reset.