This scope appears similar to the JYE Tech offerings, of which I have the "DSO Shell." My tech friends laugh at me, but I thought it was cute, it was fun to put together, and I have found it reasonably useful. I haven't used it for amp servicing yet, though. I am not sure the one I have is suitable for tube amp usage due to the input voltage rating. I also have an old Sencore 60MHz CRT analog scope I can bring out if I feel like manipulating its weight; the JYETech "toy" gets used more...
I will point out that the scope you list doesn't have a real case, looks like it's 3 layers of pc boards kept together by stand offs. Part of the info on the page mentions "DIY oscilloscope kit" so there may be some assembly required on your part. The fact that it's battery operated and won't be referenced to ground is possibly a positive thing in my book, though.
Info says it "can withstand up to +/- 400V AC/DC voltage signal". I can't decide whether that's what can be displayed, or only what the protection circuit will keep from destroying the rest of the scope, though.
If similar to mine, it's just above the level of a toy, but enough to be useful. Do be sure to check out the prices of low end "real" digital scopes, I think they're in the $200-$300 range. Ask yourself if you'll be happy with the limitations, or wish you'd saved the money to apply to a more complete unit.
You might not be able to take certifiable measurements with it, but you can probably get a good picture of what's going on in your circuit.
Tony: I would love to see your video if you can find it!
--> Steve
On Sat, Nov 25, 2023 at 07:19:25AM -0500, Tony Miklos via Jukebox-list wrote:
Hard to say how good a square wave will look on it. I didn't look but does it have a square wave test output?
And yes, you need a signal generator that can put out a 1Khz square wave. If using a sine wave you may as well skip the generator and the scope. I made a short video to show how much distortion an amp can have without seeing it with a sine wave, then switch it to a square wave and the distortion jumps off the screen at you. If I can find that video I'll upload it to youtube and post a link. Square wave or nothing.
Oops, just noticed that it also has a signal generator in it. It's probably good for amp work which is about as basic as it gets. I've been thinking of getting a newer cheap one since all I use mine for is amps. The Techtronics is around 45 years old and the control pots are going bad.
If working on Cobra amps, you will need to input the signal after the oscillator. Just yesterday I found my misplaced worn out Cobra Cartridge that is soldered to an RCA jack. Rub my finger over the needle to make sure the oscillator circuit is working.
Tony
On 11/25/2023 6:56 AM, Shankar Singh via Jukebox-list wrote:
Hello,
Is this a suitable scope to troubleshoot Wurlitzer amplifiers? Would a signal injector be required as well?
https://www.amazon.com/Oscilloscope-Persistence-Measurement-Bandwidth-Genera...
I have only done a few basic repairs and servicing, so am still a novice.
If it can be helpful, would appreciate early response; there is time constraint to ask a friend to assist with the purchase.
Many thanks 🙏
SHANKAR SINGH _______________________________________________ Jukebox-list mailing list --jukebox-list@lists.netlojix.com To unsubscribe send an email tojukebox-list-leave@lists.netlojix.com %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s Searchable Archives:http://jukebox.markmail.org/
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