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hyperparasite

Joined: Jul 29, 2008 Posts: 3 Location: OR
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Posted: Tue Jul 29, 2008 10:44 pm Post subject:
line output not "hot" enough---what to do? |
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I am finishing up a couple of my first bent toys, but ran into a couple of problems with line output.
Problem #1: Used a 3.5mm mini phone jack on an electronic toy phone with a 1M potentiometer in place of the pitch resistor. As far as I can tell, I soldered the positive and negative leads to my output jack correctly. When I run it through my little 10 Watt practice amp, I have to turn the volume all the way up to get any audible sound level. Even maxed out, it isn't much louder than the speaker inside the toy. I have read about using resistors to tame down the output current when it is too hot, but what can I do when the current is not hot enough for an adequate output level?
Problem #2: This toy now has a 1/4 inch phone jack and a toggle switch to turn the speaker on and off, as per the diagram in Reed's book. When this is run through the same amplifier, I get a nice loud sound, but if I turn off the speaker switch, the line output is also turned off. I surmise that either my wiring job is "haywire" or I don't have the right toggle switch installed. It is a SPDT, but I noticed when buying them that there were several variants with different modes and momentary designations. I was getting confused when wiring it up and it took a couple of attempts before I could get the line output to work, but alas still I can't get the speaker and line output to operate independently... |
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stolenfat

Joined: Apr 17, 2008 Posts: 476 Location: Sunny Oakland California
Audio files: 1
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hyperparasite

Joined: Jul 29, 2008 Posts: 3 Location: OR
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Posted: Thu Jul 31, 2008 7:05 pm Post subject:
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Thanks for the very helpful information and diagram. Since then I have been fiddling around with it and think that I happened upon one of the problems.
The #1 started working nice and loud through the amp, but only very intermittently (like when I would twist the adaptor on the 1/4 inch plug). Then I discovered that it would work reliably if I pulled the plugs apart and just held them together with enough pressure to only make the initial contact...
When I looked at the package for the adaptor I bought, it is a 1/4 STEREO to 3.5mm unit. This must be the source of the problem. Now I need to score some MONO adaptors so I don't go crazy from trying to troubleshoot this deal for so long. |
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