Bluesmaster PI reprise

[martin manning]

There are lots of o-scope tutorials around to get the basics. More recent ones will lean more toward digital. For this PI balance thing, just use the generator to send e.g. a 400 Hz signal into the power amp in, and put a probe on each bias test jack. This is low voltage and low frequency, so you can use x1 probes, and DC coupling so they have the same position reference on the screen. Horizontal sweep at 1 ms, vertical sensitivity at say 50 mV. You're looking for the peaks of the two signals to be equal in height, like this:

[erwin_ve]

There are lots of o-scope tutorials around to get the basics. More recent ones will lean more toward digital. For this PI balance thing, just use the generator to send e.g. a 400 Hz signal into the power amp in, and put a probe on each bias test jack. This is low voltage and low frequency, so you can use x1 probes, and DC coupling so they have the same position reference on the screen. Horizontal sweep at 1 ms, vertical sensitivity at say 50 mV. You're looking for the peaks of the two signals to be equal in height, like this:

Thats a great way to do it; add to the PI sticky?

[GAStan]

Good choice on the Hantek, that's the one I would get if I could do it over again.

It looks like the Hantek only comes with one 1x/10x probe, the other is 100x. If this is the case I suggest getting another 1x/10x probe.

[dbharris]

The auto set button will be your friend in the beginning. Good choice on scope. You can plug in a USB stick and screen shot the scope easily.

Looking forward to seeing what you can figure out!

-Dan

[martin manning]

... oops

[martin manning]

It looks like the Hantek only comes with one 1x/10x probe, the other is 100x. If this is the case I suggest getting another 1x/10x probe.

https://www.amazon.com/Hantek-Universal ... r=1-3&th=1

It should be shipped with 2x x1/x10 instead of the x100.

[martin manning]

Thats a great way to do it; add to the PI sticky?

Done.

[Raoul Duke]

Thanks guys! A wealth of info from a handful of my most trusted advisors

I really appreciate the feedback and especially Martin’s quick and simple suggestion!