How bad does it overheat? I would have thought Lorien has done the thinking on this.
Don't overthink it, Just add more metal to the existing heatsink using thermal tape.
Mouser currently has these in stock( TO220) ; IXTP01N100D , IXTP02N50D , DN2540N5-G . IXTP02N50D would be the best choice 😉 .
It's not a depletion mosfet so it certainly won't work. In that case the full supply voltage might reach the anode which can be dangerous for the tube (Russian tubes can withstand even that, tested with fake DN2540 🤣 ) .
Last edited:
I use that in a shunt regulator for CCS where the current is almost 500mA so it makes no sense in this case. The IXTP02N50D I mentioned in the above post is a good choice.
If your B+ at input is less than 300V the DN2540 are fine for such a tube. The IXTP are refinments, buy it after if you are happy with what you hear. I find they exagerate too with the price of those mosfet. I have burned some and I cried ! Burned two J310 cried again !
Before inserting the chips, I check whether all the voltages are of the appropriate value relative to GND and present in the appropriate places. I abuse the power supplies themselves before that, with resistors.
Also : The upper Riv seems not in the hole towards the dac chip side, but perhaps this is the photograph, hard to see !
Always check twice the capacitors position to avoid shorts before switching on....
Check the output of your reg before connecting them to the dac board, then as already inputed : check on the power vias relative to Vref the voltage numbers (without the ICs) when connected to the dac board.
Always check twice the capacitors position to avoid shorts before switching on....
Check the output of your reg before connecting them to the dac board, then as already inputed : check on the power vias relative to Vref the voltage numbers (without the ICs) when connected to the dac board.