Amp Stethoscope

[drhulsey]

I built my listening amp.

Brian, what type of amp did you use for the listening amp
It's VERY cool that this setup has already proved its worth. I had a feeling that Dave brought us something very useful

[tele_player]

Pretty cool.

[mchauck]

Hey Tim... for my first try at this thing, I used a stupid little battery powered Fender Mini Twin. Its about 7 x 5 x 3" !!!

I am trying to upload a pix but my reader is caput I think.....HMMMM maybe I could listen to it and .............naaaaaaaaaa!!!!

Hey I got her.....here she is. Her name is Elvira!!!!! Has all the internals layed out by Mr. Hoffman.

Brian

[drhulsey]

Her name is Elvira!!!!! Has all the internals layed out by Mr. Hoffman.

As they say in Kentucky, you can't beat that with a stick

[mlp-mx6]

Does that little amp have a blocking cap on the input?

[Bob-I]

I use the stereo in my little room as a listening amp.

What is the wattage on your stereo amp

'bout 40 watts. What's the difference, you're only listening for farts and squeeks and stuff

[mchauck]

mlp-mx6 asked
"Does that little amp have a blocking cap on the input? "


he do.......I followed the trace from the input jack on the PCB to the first resistor. I severed the trace and installed the .1 650v OC and 1M pot over the gap. It works great.

[drhulsey]

What's the difference, you're only listening for farts and squeeks and stuff

That's true if you're just troubleshooting. As Dave said, you can do "some very serious tone shaping," as well. The stereo amp, being more linear, should give you a truer re-production of the tone of the test amp. I was just curious as to what size amp had worked for you. Until about a year ago, I had a couple of older stereo amps stored in my garage. They would have been perfect, however, they fell victim to a clean out Now, I've got to look for one on ebay
Thanks for the info

[LeftyStrat]

What's the difference, you're only listening for farts and squeeks and stuff

That's true if you're just troubleshooting. As Dave said, you can do "some very serious tone shaping," as well. The stereo amp, being more linear, should give you a truer re-production of the tone of the test amp. I was just curious as to what size amp had worked for you. Until about a year ago, I had a couple of older stereo amps stored in my garage. They would have been perfect, however, they fell victim to a clean out Now, I've got to look for one on ebay
Thanks for the info

Why buy when you can build:

http://diyaudioprojects.com/Chip/LM3886 ... 886_CA.htm

[gearhead]

Why buy when you can build:

http://diyaudioprojects.com/Chip/LM3886 ... 886_CA.htm

Grack, you know how many projects I got going in parallel?!!

Ahhhhhhhhhh,

and you all keep coming up with even COOLER ones!

[drhulsey]

Why buy when you can build

I accept yo' challenge, Suh (In my best Southern accent, while twisting my long, white handlebar mustache). At least, I can keep it small. I think I'll try a mono kit and use some monitor speakers I've already got. Thanks for sharing that link