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Oscilloscope for audio testing/tube biasing
Old 4 weeks ago
Here for the gear
Oscilloscope for audio testing/tube biasing


I'm looking for a good basic oscilloscope for audio testing/tube biasing.

Can someone please recommend something that has 2+ channels (in/out), can read output levels (in dBU if possible) and has a signal generator that can do the below:

Output audio signal of 1 kHz, at -5dBU / 0.436V
Output audio signal of 1 kHz, at 0dBU / 0.775V
Output audio signal of 1 kHz, at 15dbU / 4.356V
Output DC voltage at 1.75 V
Output DC voltage at +5 V

I'm looking for something less than $200 if possible, any help appreciated!

Old 4 weeks ago
Lives for gear
brianroth's Avatar

I remember a song from my childhood: "To Dream the Impossible Dream"! <g>

What you are seeking are multiple separate pieces of test gear. An oscilloscope doesn't create audio test signals (that would be a signal generator), nor does it provide DC voltages (that would be a power supply).

And at a $200 budget.....nope.


Old 4 weeks ago
Here for the gear
OK thanks Bri, appreciated.

Yeah, I realize now the only way is various pieces and more worries.

I was previously looking at the PicoScope 2204A which seemed OK and does signal & power output but only +-2V so was hoping someone new of something else...but probably not.

Old 4 weeks ago
Lives for gear

Scopes: lots on ebay, many recent ones from various electronics schools, some very cheap.

Siggen: I'm not expert in these at all, but have done well in the past with Heathkit test gear. Back in the day, techs loved their gear, and they have the advantage of generally good accessibility, and instructions to calibrate and verify they work correctly. Of course, given their age, re-capping at least is mandatory. Again, check ebay. The other option is the PT sine wave plugin - don't know if it's good enough for what you need.

Old 4 weeks ago
Here for the gear
Thanks for the replies guys. The Analog Discovery tools look very promising!
Old 4 weeks ago

You can get soundcard-based or interface-based systems that run on a computer. The hard part is that you may need an amp and you will need a pre-amp.....


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