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My mistake - it's the diodes that I think need replacing. What's the thinking regarding heatsinking them? Is this recommended?

It looks like the regulators on my PSU-1 board have gone (they were not attached to a heatsink) and I need to replace them. I can't find the info anywhere on the forum for the specs. Can anyone help...

Think I've fund the issue - the positve rail from the PCB is +45 but hte negative is 0. Think the MOSFETS may need replacing...

I've been running an Amp 7 for a few years with no problem but the Amp has stopped working. I've checked all the voltages and have a good clean 5v, 10v and 45v supply with no fuses blown. The mute...

Thanks. Those pictures are really useful. Everything now working fine though I did fry a chip in the process. Now I can sit back and enjoy the music...

Sorry, unable to do a shematic. Basically I have now connected up the v- connector on the 10v side of the PSU1 VR to VNN at J5 on the mainboard. This means that into the VNN connector on J5 is both...

Thanks...I read some threads but still a bit confused...Do I connect V- from the VR to the PSU board or the mainboard. Does it matter? BTW what's the likely outcome of connecting +10v without...

Is that on the psu board or on the main board? VNN is -45 vdc...

Hi,

Can someone let me know how to connect the VN10 supply. I have connected the 10v trimmed output directly from the V+ connector on the PSU1 VR to J5. Do I need to connect the V- output from the...

Have finished my Amp 2 from a couple of years back and powered it up with +-45vdc with inputs grounded. D12 is illuminated even when unmuted and the outputs are giving me .5v on one channel and 1.1v...

Just finished putting together thi spower supply. When I powered up there was a flash and it seems that there has been some sort of short between the casing of C14 & D14. Any thoughts about what has...

Just finished a very long drawn out Amp 2 project and have been testing the amp with a +/- 35vdc supply. The LED D12 is on even when muted & unmuted. The outputs are showing 1.8v and cannot be...

Hi,
I have completed putting my Amp 3 together and have been doing some tests with a 12v 250mA supply. There is no sound coming from the amp and I have only 0.6v coming from pin 6 (ref) Pin 1 & pin...

Hi,
I think Jan must be away at the moment. I sent an e-mail a couple of weeks back and haven't yet had a reply. He doesn't seem to have posted ont he forum for some time either.

The problem with the LED seesm to have simply been a polarity one. I have hooked the amp up to 5v only and the light comes on, though it doesn't go off when unmuted. I have got the following values...

The problem with the LED seesm to have simply been a polarity one. I have hooked the amp up to 5v only and the light comes on, though it doesn't go off when unmuted. I have got the following values...

I just used a regular digital voltmeter. The black COM probe was not touching anything as far as I can tell and I touched VPP with the red probe. The click was the chip blowing.
With the enclosed...

Having inspected C5A1 & C20 I'm not sure there is any blackening now. They may well be OK but I'm still unsure why the chip would blow when testing the VPP and why the diode wasn't working. Any...

I completed my Amp2 and hooked it up today. I have a 625w SMPS which gives 48vDC. I don't have an earth output on the DC side of the SMPS so I connected PGND to a star connector where the AGND is...

I have almost completed the Amp 2 and just had a couple of final questions -

Do I need to connect some kind of jumper in J1 to set the BBMO to 80ns or do I leave the terminals all unconnected?
...

I have just downloaded the operatin instructions for the TK2350 which seem to match the PCB O.K. Is it just a matter of ignoring the assembly instructions that Jan has e-mailed and working from this...

I have just received the Amp 2 kit and had some instructions by e-mail a few days back. There seems to be some discrepancy between the type of PCB I have and the assembly instructions. Are the...

Thanks...
The AMp 2 should be with me soon. I have located a SMPS which will give me 48vdc at 625va. Will this be suitable for domestic use? Also - I will need to build a seperate 5vdc PS as I did...

Hi There,

I am about to order an Amp 2. Last year I built the Amp 1 and have decided to go for something with more power. I have a few questions -
1. Are these amps currently being shipped?
2....

Just wondering if this Amp is significantly more difficult to build than the AMp 1? I have built an Amp 1 succesfully and am thinking of trying out the Amp 2. Is it just a case of more components to...