A function generator for £16? How bad can it be? FG-100 DDS
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- čas přidán 1. 10. 2023
- This video relates to an eBay purchase, which is an FG-100 DDS function generator.
There are a few videos of some negative reviews but I didn't have that experience today!
My unlucky CZcamsr counterpart, I believe he repaired his by messing with the opamps inside:
• 0060 - FG 100 DDS Func...
Quite a contrast!
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Very impressive. I will have to get one of these eventually.
Handy little device. I currently have 4 cassette decks and could have a 5th very soon....
I might get one of these. Like you said it's perfect for simple stuff like putting a sinewave into an amp for testing. That other guy must have got a duff one. When you're getting technology like this knocked out in china for peanuts there isn't going to be much quality control is there? Obviously, if it's you who gets a faulty one you're not going to be pleased. But if you want better quality, pay more money.
Yes the usual cheap manufacturers firing them out at speed. I've not had a problem with mine thankfully, but then alongside the potential issues is usually a no quibble returns procedure nowadays too. Win win for the buyer in my eyes
I just bought onbe from Temu. It took a while fo rme to figure out due to the lack of clear instructions but it works great. It's a nice little piece of kit.
Use mine a lot.
One problenm with those function generators is, that there are different versions with different firmware sold by many different sellers.
I have an old one and its very bad, even at low frequencies. I have a new one and its very good, even at high frequencies. It also can generate more and different signals, etc. noise.
Would it be possible to make a modification and install an interior lithium battery to make it portable? Thank you.
Hi most definitely with the correct charger setup
Was it my video you saw?
It looks like you were one of the lucky ones!
Hello buddy it was! I wanted a signal generator and wrongly presumed they would all just generate a signal.
When it arrived I realised I hadn't checked reviews - and I watched yours and got extremely worried. A huge difference between the two!
@@pwrestoration I was eventually able to fix the one I got, but it required changing the op-amps on the output.
Hi I picked up a Pintek FG-52 lights up, fan comes on, but I’m going to sell untested as I’ve no idea about stage set up of it!
There's probably a pdf of its manual around!
@@pwrestoration hi yes there is on line . I’ve loads to sell so just haven’t got time to get it all set up and have a go at it mate! I’m sure if I start off bids at £20 untested it will go
Apparently the quality of the output depends on the quality of the op-amps used in construction. Some makers are putting cheaper components in. Looks like you got a quality one.
That's not the end of the world, op-amps are dirt cheap for a perfectly decent jellybean NE5532 or TL072, so even if you get a dud you can just swap em out, maybe even with some from an old junk board. That's why you don't throw out old rubbish, even if it's a Hong Kong radio cassette from 1995 - they had genuine chips in em back then no matter how cheap they were!
ETA this got me looking at some web pages looking at fake op-amps - fascinating. Seems most of the fakes are even cheaper comparator ICs repackaged (and I have used these in a home-built preamp - they sounded awful!) - but why would you bother if you're only saving maybe ten cents a chip? (But then this is Shenzhen we're talking about here).
Would a better (and cheaper) option not be to make a few WAV files on a PC of the tones you need, and burn these to a CD? That way you know you're getting a very high quality, line level output of the correct impedence (and with no offset etc) for audio equipment.
This doesn't seem too bad though. Would be interesting to see what is inside.
That way would work, but a cd player on the bench might take a lot of room!
@@pwrestoration Fair enough, I was making the assumption you'd have one to hand 😁
Did you open it up? I am curious what IC you have inside.
I didn't, I didn't want to tempt fate! I think someone in the comments has opened one up though
how to adjust to stereo output with opamp?
The red wheel
There was once a time I used a mobile phone for tone generation, until one day a piece of equipment I was testing was putting 40v DC out of the preamp input.... good bye mobile phone dac 😅
😅 well yeah, theres your issue haha
Looks decent for £16
Will this run spooky software mate?
What's spooky software? 😅👻👻👻
i bought this, it turned up ratling.....