Hey guys, this is my first time posting but I've been around a while. I got the schematic for wiring a headphone-out jack from ROG and was wondering if I applied it to the Noisy Cricket Mark II correctly?
(http://bigheadfx.files.wordpress.com/2007/12/headphone.png)
Thanks to Dano for such a great layout and his work on the Noisy Cricket.
I'm planning on building a ruby for the holidays (cool present to myself). I've also been wondering about adding headphones to my 386 amp. Am I correct in planning on using a mono jack for the output (line out to speaker cab) and a stereo jack for the headphones so I can hear the signal thru both ears? This is what appears to be happening in the layout above. I know, simple question, but I've never used enclosed jacks as pictured above.
FWIW your layout seems to follow the ROG schematic. Since you're using an output jack instead of the wiring direct to the speaker your layout looks OK. If you're wiring to the speaker direct from the circuit board, I think you need a special headphone jack that will cancel the signal to the speaker when the phones are used (someone correct me here if I'm way off).
Happy building.
In the layout above and the schematic the headphone jack is a stereo one but the tip and ring are connected together so if you plug in stereo headphones you get sound in both sides.
The jack in the schematic is a "normally closed" switched type. When nothing is plugged into the headphone socket the tip is connected to the + of the speaker. When you plug a jack in the connection to the speaker is broken and you just get sound out of the headphones.
So, according to my diagram above, when I have headphones and a speaker connected I am going to get sound out of both of them? That is ok with me, but for future reference, what kind of headphone jack would I need for the sound to the speaker to be cut out when I have the headphones connected?
Is my layout going to affect the sound at all?
What purpose does the 10 Ohm resistor serve?
Per the ROG FAQ, the 10 ohm resister shunts a little bit of the signal to ground so you don't go deaf when using headphones. ;D
Hello. This is my first time posting so I hope I'm doing it right :).
I just built my first ruby amp and it has a speaker directly soldered on. I was trying to add another jack so I can bypass the speaker and connect it to a larger speaker (or headphones, using a plug) if need be. I took a look around the forums and landed in this thread. Let me just say that I know fairly little about electronics (i.e. nothing). I work via simplified diagrams and pictures :P.
So I was just wandering if someone could explain something to me. If on the diagram the input is on the far right and the output and headphone jacks are on the far left, what is the component in the middle (next to the battery) suppose to be?
And do I really need to connect all the ground wires to one another or can I just solder the ground from the headphone jack directly to the circuit board? The same question goes for the output cable. And will this bypass the speaker when the headphones are plugged in?
Thanx in advance :)
I tried moding the circuit but it doesn't work like it's suppose to :(. Now the headphones work, but the speaker doesn't unless I connect the ring and the tip. Am I missing something? Or do I have to use some special jack or something?