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I'd like one but my neighbours wouldn't be that excited I guess.
I read a bit of this review: http://www.iar-80.com/page142.html

Unfortunately I get about 800mV from Q10 to GND. The rectifier gets very hot too.
I connected a wallwart 20-24VDC supply to AC1 and GND. Can someone guess what could be wrong?

I already...

Thanks again! :)

Thank you, but I think I'll manage to remove it with a solder pump - I achieved simialr errors while building a PIMETA. :)



I did send the first part flying by squeezing with the tweezers too...

Thanks, I looked at the site. By the way I managed to mount Q10 backwards (only glancing at the picture in the AI). OH well. :)

Thank you very much! I will look into the board's nooks and crannies for the pad. :)

It was quite a fight but I hope I the first test turns out OK. I already lost two resistors and a cap...

I hope I got lucky and that pin (VCC1a - the first one from the left in the picture) is connected to it's neughbours and I can just create a solder bridge? Tha'ts how I understand the schematic....

I'm a fan of Portasol Buthane soldering irons. Though practicing on two SMD practice kits I destroyed two soldering tips already. I bought Solder honey, a small tin can full of solder tip "stuff"...

Hi,

do you think I could add this to have a universial clipping indicator (if physically possible)?

If yes, could you point me to where I should hook up the circuit?
There is a "Connection To...

Thanks a lot!

It's a coincidence, though I wrongly wrote subwoofer while they're actually woofers.
There will be two tweeters and two woofers in parallel in a dipole speaker. Both won't need a...

Can I use different input capacitors for the channels on one Amp4?
I want to use on channel for a tweeter and the other one for a subwoofer.
Thanks!

Are there any other parts that I need to consider or buy with the standard Amp4PS kit for using the alternative STA517B?

I'll need them for two reasons:
one Amp4 will be driving 4Ohms with a...

I'd certainly be intersted in getting Amp4-HV kits. :) I also have got no reply from Jan yet, though I mentioed the HV version to him.

Thank you for the quick reply. :)

Would it be bad to put an 8 Ohm speaker on one channel and a 4 Ohm speaker on the other channel of the same amp (provided the amp can handle both loads of course)?

Hm, but isn't tha only about the power connectors? I'll see, what 'll do when I get my boards then. :)

I found these here, is the 10mm lead spacing is OK? I'd put one on each side if possible and use an extra heatsink for the IC.
Mouser # 598-SLPX223M050H9P3
link:...

What is the maximum diameter for the big caps - they are the only ones which wouldn't fit, no?

Thank you! :)

Thanks for the replies!

Would such a 220-110 transformer have to have a high VA rating like the ones connected to it?
That one would cost me almost as much as an R-core and since those are less...

Maybe I shouldn't open another thread, so I'll ask here:

Let's say I unwind a bit: Can I use two trafos for one Amp15 with parallel secondaries to get double VA rating?

Also I read on this...

I too have severe problems viewing the forum in both Chrome 9 beta and IE9 beta.
Chrome won't display anything and in IE9 I need to reload the page to see it every other time.

I actually found the manufacturer's site: :)
http://www.frei.de/produkte/stromversorgungen/pdf/einphasen-transformatoren/Einphas-Trafo_63-250W.pdf

Unfortunately I have no camera at the moment, I'll post, when I can.

Do you think I'll probably get noise issues with them anyway and should rather buy a toroid?

I found a step by step...

Thank you and sorry for posting before looking at those trannies again. I don't have a good record at this forum. :)

They are 48V unfortunately, I'll look if can unwind them.