Tripath TA2022 Amp project

[activexp]

Thanks for your valuable input Mark

Think I'll forget that idea seeing that the speakers I use most often are 4 ohms.

Now that I've been bitten by the amp bug, what is your opinion of LJM L12-2?

http://www.ebay.co.uk/itm/1207449952...84.m1423.l2649

I assume that it'll be OK with 4 ohms.

[Reid Malenfant]

If the circuit is basically the same as the L20, which looking at it, it probably is then all I can say is it could be a good bit better

It's quite a simple circuit with some good points, however I would have done a few things a little differently I did actually think about purchasing a couple of L20 amps & modifying them, it wouldn't take a lot of work to bring them up to a very good spec, or should I say the kind of spec that I would want to produce superb music rather than just have a superb spec

Lets just say that for the money they'll be excellent VFM & sound fine, but with some work on them they could be very good indeed

Yes that'll be fine with a 4 ohm load...

[activexp]

That's encouraging I might take this one up as a BIG AMP project.

For the PSU + Speaker protection I've got my eye on this:

http://www.ebay.co.uk/itm/F6-Univers...24530820428411

Looks like it'll do the job.

[activexp]

After a few months of relatively infrequent use, the TA2022 amp has died in a puff of smoke, not entirely unexpected due to the heat issues with the voltage regs, inductors and smoothing caps.

I was surprised to see that the only visible damage is a burnt out 6.2 ohm 1 watt resistor, circled in red below:



As the designer ljm has not made available schematics it's difficult for a layman such as myself to diagnose the cause of the failure and attempt a repair. Probably uneconomic anyway.

So it's the scrapheap for this board, a shame really as the sound quality was excellent.

[Reid Malenfant]

If you want to send me the PCB I will take a look at it for you Steve

[walpurgis]

Desoldering braid is good for clearing PCB holes.

A can of compressed air (air duster) can be helpful too, but you have to watch where any excess solder goes!

[activexp]

If you want to send me the PCB I will take a look at it for you Steve

I'll PM you Mark