ThreeChordWonder
New member
.... what can I use it for, guitar and amp related?
So I Bought an Oscilliscope
- Thread starter ThreeChordWonder
- Start date
beaubrummels
Well-known member
I know how it's used in tuning a heterodyne radio receiver. ;-)
I believe you can check signal integrity, e.g. send a -40db sine wave into the amp and measure/compare what you get at the output, or at other audio points in the amp. I think you can test transformers for linearity also.
But I'm not an engineer/expert. Amp builders/repairers on here could tell you.
I believe you can check signal integrity, e.g. send a -40db sine wave into the amp and measure/compare what you get at the output, or at other audio points in the amp. I think you can test transformers for linearity also.
But I'm not an engineer/expert. Amp builders/repairers on here could tell you.
NegativeEase
New member
What frequencies are it ranged for? What kind?
ThreeChordWonder
New member
Its a FNIRSI-1014D
Linkey:
https://www.ebay.com/itm/4029619854...DK-7zTlTl2&var=&widget_ver=artemis&media=COPY
Up to 100 MHz 40 volts on the 1x probe, and 400 volts on the 10x probe, I believe.
I bought an extra probe with a 100x setting so I should be good way above amplifier voltages at around 500.
It also has a built in wave generator, so I'm hoping to be able to. put in nice neat sin waves at the front and compare them to the outputs on the speaker sockets, for example. I'm also hoping to be able to check filter and smoothing caps.
Linkey:
https://www.ebay.com/itm/4029619854...DK-7zTlTl2&var=&widget_ver=artemis&media=COPY
Up to 100 MHz 40 volts on the 1x probe, and 400 volts on the 10x probe, I believe.
I bought an extra probe with a 100x setting so I should be good way above amplifier voltages at around 500.
It also has a built in wave generator, so I'm hoping to be able to. put in nice neat sin waves at the front and compare them to the outputs on the speaker sockets, for example. I'm also hoping to be able to check filter and smoothing caps.
NegativeEase
New member
Then you are fine for audio. Nice! have fun
beaubrummels
Well-known member
Or Ewizard
Chistopher
malapterurus electricus tonewood instigator
I got a pretty nice oscilloscope from work back when we replaced it with a nicer one, can't really think of anything I'd do with it on guitar unless I were building a circuit
ThreeChordWonder
New member
I'm building a Hiwatt DR103 copy right now.
Ever sort out the issues you were having?
ThreeChordWonder
New member
Working on it. One of the reasons I bought the scope.
So far ive figured out how to turn it on. Methinks i should have bought a secondhand one the same age as me, something with real knobs and dials, but then I'd probably end imup having to fix that too..
It turned out I had a duff tube socket for V4 (ECC81 - phase splitter / inverter), which was causing one side to draw virtually zero current, un- balancing the pair. I'm also working on fixing a duff power tube socket, which I think is the cause of the power amp buzzing (and it is buzzing, not mains/ bad ground hum).
I applaud you for doing this, as I don't think I'd have the skill to try it.
ThreeChordWonder
New member
It's almost there. I fitted replacement power tube sockets last and to-night, and that seems to have sorted out my buzzing A bit of a mains hum to sort out, solder up the bias probe wires, and if all's well, in the cabinet she goes.
Artie
Peaveyologist
An O'scope allows you to "see" electricity. Or more relevant, a waveform. It's cool to plug in your guitar, strike a chord, and "see" what it actually is. You'll see voltage, envelope, and decay. It's also good for seeing the output of an amp. You can see where the output "clips." It's simple and complicated. Hard to explain everything in a forum post.
