Chu
1000+ Head-Fier
- Joined
- Jun 22, 2001
- Posts
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- 26
My DIY side finally broke down and I decided to try to build this thing. Anyways, the extent of my electronics knowledge was one lecture on digital logic design (i.e. what a transistor is, how to build gates, how to use those gates to do addition), so I went over to sci.electronics.basics and read up on all the newbie guides. Just have a few quick questions before I start building these things. I'm trying to build the infamous Moy amp btw.
#1: Input and Output. These are obviously the headphone jacks, but what exactly should I be looking for to buy these? I don't see a part # on Moy's article, and was wondering if anyone know offhand exactly what I should be looking for. The wall of plugs at radio shack was fairly intimidating. Also, on the headphone itself, what part of the plug are the left channel, right channel, and ground?
#2: The "R1 1/2SW1" portion of Chu's diagram is a little confusing to me. This is how I'm reading it, tell me if I'm wrong. From the input, you have wires going to both your switch and the 100K resistor. The wires from the resistor and the pot both lead to the interconnect. The net effect being you get a high voltage when the switch is on because the resistors are in parallel.
#3: A connection to three parallel lines that get smaller (in the diagram, what R2 is connected to) means connect to a ground, right? Also, what exactly is your ground? Something tells me hooking these up the headphone ground is not a good idea, but that seems like the natural solution.
#4: For the power supply diagram, there is a "low current" LED in the diagram. Since my local rat shack doesn't have that part number (RS 276-310), can someone give me a definition of what exactly "low current" means?
In any case, thanks in advance for all your help.
-Chu, who is guaranteed to electrocute himself at least once putting this together.
#1: Input and Output. These are obviously the headphone jacks, but what exactly should I be looking for to buy these? I don't see a part # on Moy's article, and was wondering if anyone know offhand exactly what I should be looking for. The wall of plugs at radio shack was fairly intimidating. Also, on the headphone itself, what part of the plug are the left channel, right channel, and ground?
#2: The "R1 1/2SW1" portion of Chu's diagram is a little confusing to me. This is how I'm reading it, tell me if I'm wrong. From the input, you have wires going to both your switch and the 100K resistor. The wires from the resistor and the pot both lead to the interconnect. The net effect being you get a high voltage when the switch is on because the resistors are in parallel.
#3: A connection to three parallel lines that get smaller (in the diagram, what R2 is connected to) means connect to a ground, right? Also, what exactly is your ground? Something tells me hooking these up the headphone ground is not a good idea, but that seems like the natural solution.
#4: For the power supply diagram, there is a "low current" LED in the diagram. Since my local rat shack doesn't have that part number (RS 276-310), can someone give me a definition of what exactly "low current" means?
In any case, thanks in advance for all your help.
-Chu, who is guaranteed to electrocute himself at least once putting this together.