Hissing sound from electronic piano

Delta prime

Joined Nov 15, 2019
841
Hello there Mr. Tonyr1080 :) that was very prudent advice.
I see you have gotten Mr. Audio gurus attention.
I'm a fan of his temporal lobe. Quite frankly everyone on this site. So powers that be don't pull me for being off topic take a look at this circuit . It's an active summing amplifier
image_41522.jpg
But you know this already I meant no offense. My point is whatever you do do not tell mr. Audio guru again you're going to use this circuit and it's going to be his beloved 741 op amp.
Or this is going to be a hoot.
For kicks and giggles. It'll be our secret.
HaHa :p
 

Thread Starter

Tonyr1084

Joined Sep 24, 2015
5,862
Nice summing amp. However, I don't want to have to stuff batteries into a box, nor do I want to plug a wall wart into it.
 

Thread Starter

Tonyr1084

Joined Sep 24, 2015
5,862
I don't have 33Ω. Have 22Ω and 47Ω. Which would be better? Or should I use a 22 & 10Ω resistors in series for each?
 

MisterBill2

Joined Jan 23, 2018
8,440
I suggest the 47 ohm resistors. The reason is that many earphones are 32 ohms, and with the parallel resistance of the load resistor it will approach the planned load from the high side, which is better than from the low side in this case.
 

Thread Starter

Tonyr1084

Joined Sep 24, 2015
5,862
Success. And great happiness. Been blasting out the neighborhood. Hey! I'm not good, but I do enjoy myself.

Thanks for all the help.

Peace and good health.

")
 
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