Re: Vox mini 3 amp

Hi midibob, the amp is running smooth again... I've made it myself a little bit easy and ordered a little PAM8403 amp board, which is also 3W and piggybacked it onto the circuit board using your input for connecting. This was very straightforward and easy to do.
Thanks again for all the information which made this possible.
Cheers, Yvan

Re: Vox mini 3 amp

No indeed, I will not use SMD as I havent got the tools for it nor the capability of making PCB's, and as it is just a one of to repair our VOX amp. I think a breadboard wil do the trick, it will be somewhat larger but there is enough space.
I've found back in the thread you used 0,85ohm 10uf caps (SMD), the ones I've got on the order list is a 0,68ohm 10uF cap so it will be ok I guess...
Thanks a lot for all the documentation on this topic.
Cheers.
Yvan

Re: Vox mini 3 amp

Hi Bob, was just hoping you might had one still lying around ;-) I going to try one myself thanks to your information post, but as I do not have the possibility to create PCB's I will try to build it on a breadboard. Should not be that complex I think, but not as compact as yours.
What is the reason you went for a low ESR and how low should it be? I'll search Digi-Key for components this afternoon I think as it is a rainy day...
Have a nice day,
Yvan

Re: Vox mini 3 amp

Hi midibob, I'm wondering iff you still have one off your daughterboards, I've read you stopped producing, but just checking if perhaps you've made a new batch? I think you've made already a lot off people happy with it, so I was just hoping...
Have a nice Easter Sunday
Yvan

Re: Vox mini 3 amp

Yes you are right. consumption would increase.
I still find it very cool that you reached in repearing a broken amp like that, resoldering such a microscopic part. I did not get any further than basic electronics. But still thanks for your info
Grt
Vidji

Re: Vox mini 3 amp

Hi Midibob.
Thx for the info, I was thinking if it is possible to put another (prefabricated, like from old computerspeakers) amp in, taking the input signal from the headphone, here you've got some space to solder and output directly to the speaker. Or could give this some other kind of problem?

Vidji

Re: Vox mini 3 amp

Hi Midibob,
I'm glad i've read your post, but also a little disappointed that it is that hard to repair.
I just received a Vox mini 3, one i've bought at an auction, missing the power source, so I could not test it. but after attaching a 12VDC it did not function through the speaker. Everything else works fine through the headphone output. So I first thought it was the headphone interuption which was malfunctioning but it was not, then I read somewhere on the internet that the headphone is before the amp, so I tought that the output amp was fauty,...