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I would say that an amp6 b would be best so you wont have to play with mains voltage, just buy a 12v laptop type psu to power it.
Much safer :)

The amp10-basic also has built in rectification, as do the amp5 and amp10.

I did one step at a time, but didnt spend long listening in between each change.
However, changing from cheap input caps and increasing the value to the 'standard' 2.2uf mostly brought about more...

I got hold of one of the above through ebay, for a very small sum for playing around with.
As standard it sound rather flat and uninteresting, and with quite a farty bass quality.

After replacing...

Yes, I switched the Ground and the AC round the wrong way.

Yes,

I got the polarity wrong...doh! My amp4 still survived though, thats twice I've done something stupid and its still working.


Great little amp :)

I also agree, I'm always put off by sites which require a 'sign in' just to see the prices.

Clean hot iron tip with lots of solder (60/40 lead), rub the solder off. The tip should now look silver coloured with no black residue.
Clean area of board with PCB cleaner and an old toothbrush....

Cleaning did nothing. Chip is dead, it happens sometimes...perhaps I did something stupid, who knows.

Thanks for all the advice!

In other words perhaps the choice between the two is the layout and features rather than outright 'sound quality' variations?

Well, I used the rework station to solder the amp3 T chip on. The solder connections are very tidy, I was quite proud of the job.
I think the T chip is perhaps not as heat tolerant as others, as on...

Found these at work...

Suntan non polar 16v 1000uf

I have no other specs or part number. They dont look very good to be honest, but I'm going to try a bank of 10 for a ta2024 evaluation board...

Thanks, I'll give it a try :)

Can I use non-polar caps for the bulks? I have found lots of 1000uf nonpolar caps with which I could build an array.

Thanks! :D

Sold to Paul :)

Hi,

It can be a bit hit or miss. I've always had very good delivery times, but not all of my questions have been replied to. Still, I am willing to put up with the odd issue for the sake of great...

Hi,

Have a look on ebay 320399940738

This would do the job, or something like it.

It may be just the t chip, I'm not sure if you can verify without replacing it though. You could take the chance and buy just a new chip, or you could buy a new kit.
The amp6b is one of the...

Where was the spark?

c13 and c12 are also part of the filters, so I have bought some 0.22uf 63v Wimas polyprop film to replace the stock surface mount caps.

PSU built, output torroids wound, T chip soldered on the...

1a is too low for an amp6b, laptop type chargers (switch mode) will overheat and die if you draw too much current from them.
Try a different 12v of 3a (or so) and keep your fingers crossed you...

:)

First link look okay. Make sure you buy lead solder, it can be done with lead free but its harder and has to be at a much higher temperature.

Get a different wife :)

For doing bulk caps perhaps 320c/330c with the iron.