K Fodder wrote:
Hi can someone please help me with what scope I should get for
Audio equipment repair? I need to have flexibility so I wont
have to buy another for a while. A benchtop model is fine.

I want something specifically to cover tube/valve amps.
I need to be able to check the performance of amp and see if
my input signal is distorting, deteriorating, has interference
or other types of problems that plague audio.

What the max MHZ range would I need to aim for?
What other features would it need or be handy?
Do you know a specific brand and model?
Do you think I need any other equipment?
Whats a good brand/model function generator?

Lastly I have read suggestions that I should get an older analog
scope for this work. And then read the digital ones "can" do the job.
It is a bit of conflicting information what do you think?

What would be best for audio and offer the most flexibility?
Or has there been a scope that covers both digital and analog well?

Detailed answers are fine. Learning...


I would recommend getting a dual trace scope. Minimum 20/30MHZ
bandwidth. You should be able to get a used one reasonable.
($50 to $200 dollars) I like Tektronix, but a older BK, Hitachi, Kikutsi
or such would be fine. There are some newer imports that MCM electronics
carrys.

Since audio only goes up to 20Kilo Hz or so, you really don't need
a lot of input bandwidth. But for looking at transients and other
things it can be helpful.

I have little plastic boxed function sweep generators. You can also get
CD's with audio tones and sweeps on them. For quick and dirty, download
the CD to a small MP3 player and thats about as small as it gets.
If your trying to do THD tests or such thats another ball game to
get a low THD sine source. Depends on what your doing...

bob