prototype schematic--any suggestions?
Hi all,
here's the circuit I built. It sounds OK, but I want to be sure it's within sensible...
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Yes, I've thought about that too. I think for 1M to perhaps 3M a short 2ft cable might be OK, but I'm using 10M, so I've actually built a buffer in a box...
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buffer schematic draft
Hi all, thanks for your comments.
Here's a draft of the circuit I plan to build. Any comments?
...
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Hi, thanks Jim, you're prolific!
IC5 is some kind of (proprietry?) opamp device, in an SIP package called HA1457W. I can't find a datasheet...
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piezo buffer mod for boss GE-7 eq pedal
Hi all, found an old ampage thread about adding a high impedance buffer to the GE7. The author describes the mod as follows:
"I wanted...
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Success
Hi all,
I had a good look at the input, 1Mohm seemed a bit low for a passive piezo (no onboard preamp). The tone issues...
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Yes...that's logical. Can anyone tell me what the caps are in the photo? I've never seen this kind before. So far I'm guessing multilayer ceramic.
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I see, so if I replace to tl062's I should look for the lowest power option. Actually, the Barcus Berry clone has a single tl062, and that's quiet enough...
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Thanks Enzo. What kind of current can phantom power deliver? For example, if I replaced the 3 tl062 s in the unit with tl072's or 5532's, am I likey to be...
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Thanks Pete.
I've had a look around and found some other options for the opamps: AD8032, LF351, Ne5532, TL082. Using phantom 48V or 9V adaptor, current...
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Ultrasound DI/Preamp: are these (photo) caps noisy?!
Hi all,
my ultrasound DI/Preamp is a disappointment. Sounds flat, hisses, turn things up (line out/gain/notch filter) and just gets noisier....
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Hi JM and Steve,
perfect 10! Added the cap and resistor across pins 1 and 2 and grounded through 10k and 1uF. It's on strip board already,...
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I may have identified at least one problem...c8, is supposed to be 100n, but the little mtk box has 124k100 on the top...should be 102k100, shouldn't it?
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Thanks guys,
I'll check out the things you've noted and post results. The piezo is slightly louder directly into amp, but sounds, well, like...
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acoustic preamp needs BOOST...help!
Hi all, new here...
I recently built a preamp/buffer for my piezo pickup. Here's the schematic I followed:
http://analoggur...
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